From e1d21d7a37cad6e637eb8c46f1947a3cc939d0cc Mon Sep 17 00:00:00 2001
From: Dmitriy Novozhilov <dmitriy.novozhilov@jetbrains.com>
Date: Tue, 15 Feb 2022 12:17:08 +0300
Subject: [PATCH] [Test] Enable MultiPlatformProjects in multiplatform tests by
 default

---
 .../defaultArguments/annotationArgumentEquality.kt          | 1 -
 .../tests/multiplatform/defaultArguments/annotations.fir.kt | 1 -
 .../tests/multiplatform/defaultArguments/annotations.kt     | 1 -
 .../defaultArguments/annotationsViaActualTypeAlias.fir.kt   | 1 -
 .../defaultArguments/annotationsViaActualTypeAlias.kt       | 1 -
 .../defaultArguments/annotationsViaActualTypeAlias2.kt      | 2 +-
 .../tests/multiplatform/defaultArguments/constructor.fir.kt | 1 -
 .../tests/multiplatform/defaultArguments/constructor.kt     | 1 -
 .../expectedDeclaresDefaultArguments.fir.kt                 | 1 -
 .../defaultArguments/expectedDeclaresDefaultArguments.kt    | 1 -
 .../expectedInheritsDefaultArguments.fir.kt                 | 1 -
 .../defaultArguments/expectedInheritsDefaultArguments.kt    | 1 -
 .../expectedVsNonExpectedWithDefaults.fir.kt                | 1 -
 .../defaultArguments/expectedVsNonExpectedWithDefaults.kt   | 1 -
 .../tests/multiplatform/deprecated/header.fir.kt            | 1 -
 .../diagnostics/tests/multiplatform/deprecated/header.kt    | 1 -
 .../tests/multiplatform/enum/additionalEntriesInImpl.kt     | 1 -
 .../tests/multiplatform/enum/constructorInHeaderEnum.fir.kt | 1 -
 .../tests/multiplatform/enum/constructorInHeaderEnum.kt     | 1 -
 .../tests/multiplatform/enum/differentEntryOrder.kt         | 1 -
 .../tests/multiplatform/enum/enumEntryWithBody.fir.kt       | 1 -
 .../tests/multiplatform/enum/enumEntryWithBody.kt           | 1 -
 .../diagnostics/tests/multiplatform/enum/javaEnum.kt        | 1 -
 .../diagnostics/tests/multiplatform/enum/simpleEnum.kt      | 1 -
 .../exhaustiveness/commonSealedWithPlatformInheritor.fir.kt | 1 -
 .../exhaustiveness/commonSealedWithPlatformInheritor.kt     | 1 -
 .../tests/multiplatform/exhaustiveness/expectEnum.fir.kt    | 1 -
 .../tests/multiplatform/exhaustiveness/expectEnum.kt        | 1 -
 .../multiplatform/exhaustiveness/expectSealedClass.fir.kt   | 1 -
 .../tests/multiplatform/exhaustiveness/expectSealedClass.kt | 1 -
 .../exhaustiveness/expectSealedClassWithActualTypealias.kt  | 1 -
 .../exhaustiveness/expectSealedInterface.fir.kt             | 1 -
 .../multiplatform/exhaustiveness/expectSealedInterface.kt   | 1 -
 .../tests/multiplatform/exhaustiveness/kt45796.fir.kt       | 1 -
 .../tests/multiplatform/exhaustiveness/kt45796.kt           | 1 -
 .../tests/multiplatform/expectInterfaceApplicability.fir.kt | 1 -
 .../tests/multiplatform/expectInterfaceApplicability.kt     | 1 -
 .../multiplatform/generic/functionTypeParameterBounds.kt    | 1 -
 .../tests/multiplatform/generic/genericMemberBounds.kt      | 1 -
 .../tests/multiplatform/generic/membersInGenericClass.kt    | 1 -
 .../typeParameterBoundsDifferentOrderActualMissing.fir.kt   | 1 -
 .../typeParameterBoundsDifferentOrderActualMissing.kt       | 1 -
 ...ualClassWithDefaultValuesInAnnotationViaTypealias.fir.kt | 1 -
 .../actualClassWithDefaultValuesInAnnotationViaTypealias.kt | 1 -
 .../headerClass/actualClassWithDifferentConstructors.fir.kt | 1 -
 .../headerClass/actualClassWithDifferentConstructors.kt     | 1 -
 .../tests/multiplatform/headerClass/actualMissing.fir.kt    | 1 -
 .../tests/multiplatform/headerClass/actualMissing.kt        | 1 -
 .../headerClass/baseExpectClassWithoutConstructor.fir.kt    | 1 -
 .../headerClass/baseExpectClassWithoutConstructor.kt        | 1 -
 .../tests/multiplatform/headerClass/classKinds.kt           | 1 -
 .../dontOverrideMethodsFromInterfaceInCommonCode.kt         | 1 -
 .../headerClass/expectClassWithExplicitAbstractMember.kt    | 3 +--
 .../headerClass/expectClassWithoutConstructor.kt            | 1 -
 .../expectDeclarationWithStrongIncompatibilities.fir.kt     | 1 -
 .../expectDeclarationWithStrongIncompatibilities.kt         | 1 -
 .../expectDeclarationWithWeakIncompatibilities.fir.kt       | 1 -
 .../expectDeclarationWithWeakIncompatibilities.kt           | 1 -
 .../multiplatform/headerClass/expectFinalActualOpen.kt      | 1 -
 .../headerClass/explicitConstructorDelegation.fir.kt        | 1 -
 .../headerClass/explicitConstructorDelegation.kt            | 1 -
 .../extendExpectedClassWithAbstractMember.fir.kt            | 1 -
 .../headerClass/extendExpectedClassWithAbstractMember.kt    | 1 -
 ...xtendExpectedClassWithoutExplicitOverrideOfMethod.fir.kt | 1 -
 .../extendExpectedClassWithoutExplicitOverrideOfMethod.kt   | 1 -
 .../multiplatform/headerClass/extraHeaderOnMembers.fir.kt   | 1 -
 .../tests/multiplatform/headerClass/extraHeaderOnMembers.kt | 1 -
 .../headerClass/functionAndPropertyWithSameName.kt          | 1 -
 .../headerClass/genericClassImplTypeAlias.fir.kt            | 1 -
 .../multiplatform/headerClass/genericClassImplTypeAlias.kt  | 1 -
 .../tests/multiplatform/headerClass/headerClassMember.kt    | 1 -
 .../headerClass/headerClassWithFunctionBody.fir.kt          | 1 -
 .../headerClass/headerClassWithFunctionBody.kt              | 1 -
 .../tests/multiplatform/headerClass/implDataClass.kt        | 1 -
 .../tests/multiplatform/headerClass/implOpenClass.kt        | 1 -
 .../headerClass/inheritanceByDelegationInExpectClass.fir.kt | 3 +--
 .../headerClass/inheritanceByDelegationInExpectClass.kt     | 3 +--
 .../multiplatform/headerClass/memberPropertyKinds.fir.kt    | 1 -
 .../tests/multiplatform/headerClass/memberPropertyKinds.kt  | 1 -
 .../modalityCheckForExplicitAndImplicitOverride.fir.kt      | 1 -
 .../modalityCheckForExplicitAndImplicitOverride.kt          | 1 -
 .../headerClass/morePermissiveVisibilityOnActual.fir.kt     | 1 -
 .../headerClass/morePermissiveVisibilityOnActual.kt         | 1 -
 .../morePermissiveVisibilityOnActualViaTypeAlias.kt         | 1 -
 .../tests/multiplatform/headerClass/nestedClasses.fir.kt    | 1 -
 .../tests/multiplatform/headerClass/nestedClasses.kt        | 1 -
 .../headerClass/nestedClassesWithErrors.fir.kt              | 1 -
 .../multiplatform/headerClass/nestedClassesWithErrors.kt    | 1 -
 .../multiplatform/headerClass/noImplKeywordOnMember.fir.kt  | 3 +--
 .../multiplatform/headerClass/noImplKeywordOnMember.kt      | 1 -
 .../tests/multiplatform/headerClass/privateMembers.fir.kt   | 1 -
 .../tests/multiplatform/headerClass/privateMembers.kt       | 1 -
 .../tests/multiplatform/headerClass/simpleHeaderClass.kt    | 1 -
 .../multiplatform/headerClass/smartCastOnExpectClass.kt     | 1 -
 .../tests/multiplatform/headerClass/superClass.fir.kt       | 1 -
 .../tests/multiplatform/headerClass/superClass.kt           | 1 -
 .../tests/multiplatform/headerFunInNonHeaderClass.fir.kt    | 1 -
 .../tests/multiplatform/headerFunInNonHeaderClass.kt        | 1 -
 .../hmpp/sealedInheritorsInComplexModuleStructure.fir.kt    | 1 -
 .../hmpp/sealedInheritorsInComplexModuleStructure.kt        | 1 -
 .../testData/diagnostics/tests/multiplatform/hmpp/simple.kt | 1 -
 .../diagnostics/tests/multiplatform/implDelegatedMember.kt  | 1 -
 .../diagnostics/tests/multiplatform/implDynamic.fir.kt      | 1 -
 .../testData/diagnostics/tests/multiplatform/implDynamic.kt | 1 -
 .../diagnostics/tests/multiplatform/implFakeOverride.kt     | 1 -
 .../diagnostics/tests/multiplatform/incompatibles.fir.kt    | 1 -
 .../diagnostics/tests/multiplatform/incompatibles.kt        | 3 +--
 .../inlineClasses/expectActualInlineClass.fir.kt            | 2 +-
 .../multiplatform/inlineClasses/expectActualInlineClass.kt  | 2 +-
 .../inlineClasses/jvmInlineExpectValueClass.kt              | 1 -
 .../diagnostics/tests/multiplatform/java/flexibleTypes.kt   | 1 -
 .../diagnostics/tests/multiplatform/java/parameterNames.kt  | 1 -
 .../tests/multiplatform/modifierApplicability.fir.kt        | 1 -
 .../tests/multiplatform/modifierApplicability.kt            | 1 -
 .../diagnostics/tests/multiplatform/namedArguments.fir.kt   | 1 -
 .../diagnostics/tests/multiplatform/namedArguments.kt       | 1 -
 .../tests/multiplatform/privateTopLevelDeclarations.fir.kt  | 1 -
 .../tests/multiplatform/privateTopLevelDeclarations.kt      | 1 -
 .../diagnostics/tests/multiplatform/sealedTypeAlias.kt      | 1 -
 .../tests/multiplatform/sealedTypeAliasTopLevel.kt          | 1 -
 .../tests/multiplatform/topLevelFun/callHeaderFun.kt        | 1 -
 .../topLevelFun/callableReferenceOnExpectFun.fir.kt         | 1 -
 .../topLevelFun/callableReferenceOnExpectFun.kt             | 1 -
 .../topLevelFun/conflictingHeaderDeclarations.kt            | 1 -
 .../topLevelFun/conflictingImplDeclarations.fir.kt          | 1 -
 .../topLevelFun/conflictingImplDeclarations.kt              | 1 -
 .../tests/multiplatform/topLevelFun/functionModifiers.kt    | 1 -
 .../topLevelFun/headerAndImplInDIfferentPackages.fir.kt     | 1 -
 .../topLevelFun/headerAndImplInDIfferentPackages.kt         | 1 -
 .../multiplatform/topLevelFun/headerDeclarationWithBody.kt  | 1 -
 .../tests/multiplatform/topLevelFun/headerWithoutImpl.kt    | 1 -
 .../topLevelFun/implDeclarationWithoutBody.fir.kt           | 1 -
 .../multiplatform/topLevelFun/implDeclarationWithoutBody.kt | 1 -
 .../multiplatform/topLevelFun/implWithoutHeader.fir.kt      | 1 -
 .../tests/multiplatform/topLevelFun/implWithoutHeader.kt    | 1 -
 .../tests/multiplatform/topLevelFun/inlineFun.fir.kt        | 1 -
 .../tests/multiplatform/topLevelFun/inlineFun.kt            | 1 -
 .../tests/multiplatform/topLevelFun/simpleHeaderFun.kt      | 1 -
 .../topLevelFun/valueParameterModifiers.fir.kt              | 1 -
 .../multiplatform/topLevelFun/valueParameterModifiers.kt    | 1 -
 .../topLevelProperty/differentKindsOfProperties.fir.kt      | 2 +-
 .../topLevelProperty/differentKindsOfProperties.kt          | 2 +-
 .../tests/multiplatform/topLevelProperty/simpleHeaderVar.kt | 1 -
 .../jetbrains/kotlin/test/runners/AbstractDiagnosticTest.kt | 6 ++++++
 .../kotlin/test/runners/AbstractFirDiagnosticTest.kt        | 6 ++++++
 145 files changed, 22 insertions(+), 148 deletions(-)

diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationArgumentEquality.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationArgumentEquality.kt
index 7022108ef23..3fe9dc4930a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationArgumentEquality.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationArgumentEquality.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.fir.kt
index ad9b6a09b45..d91f570f99e 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.kt
index ddf7d94e7fc..948d3374e8f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotations.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.fir.kt
index 570743e36c4..4aadc9bd854 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.kt
index ae6dffb212f..5c7ad0b5d0f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias2.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias2.kt
index 33745770423..8f998a99a7f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias2.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/annotationsViaActualTypeAlias2.kt
@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects -ProhibitGenericArrayClassLiteral
+// !LANGUAGE: -ProhibitGenericArrayClassLiteral
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.fir.kt
index 9805029743d..6d59cac4299 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.kt
index 0588b55f901..256191aa96a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/constructor.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.fir.kt
index d83d88bb81b..4d8310d3b80 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.kt
index ef72dee3522..0f17b475376 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedDeclaresDefaultArguments.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.fir.kt
index cb557e3ed51..fdf60804e4f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.kt
index d6e9b0daca8..83933c7e73b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedInheritsDefaultArguments.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.fir.kt
index 250cdfada5d..f03d431301a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.kt b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.kt
index 54826ac0766..70bedb5187d 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/defaultArguments/expectedVsNonExpectedWithDefaults.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.fir.kt
index 5f9fcd55240..3e2089dcc97 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.kt b/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.kt
index 579c3db9a01..64e6f75462f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/deprecated/header.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/additionalEntriesInImpl.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/additionalEntriesInImpl.kt
index 61fd0542bbb..755ad7b827c 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/additionalEntriesInImpl.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/additionalEntriesInImpl.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect enum class Foo { A, B }
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.fir.kt
index 5546bcea3c4..5029835c698 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.kt
index f12cc694024..cf3dd53959a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/constructorInHeaderEnum.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/differentEntryOrder.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/differentEntryOrder.kt
index cba489e3172..b8ebc2a5c37 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/differentEntryOrder.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/differentEntryOrder.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect enum class Foo { A, B }
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.fir.kt
index c2a35bfb500..9b97c8e9aa7 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.kt
index 5f06869f912..9033bddee4a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/enumEntryWithBody.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/javaEnum.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/javaEnum.kt
index a677fca38ef..154f409fd3d 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/javaEnum.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/javaEnum.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect enum class Foo {
diff --git a/compiler/testData/diagnostics/tests/multiplatform/enum/simpleEnum.kt b/compiler/testData/diagnostics/tests/multiplatform/enum/simpleEnum.kt
index 715c68634d2..945a7312ef3 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/enum/simpleEnum.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/enum/simpleEnum.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect enum class Foo {
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.fir.kt
index 82fbffff622..9f184e1b792 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // ISSUE: KT-45848
 // MODULE: m1-common
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.kt
index ce5731722df..6b1989d4fcb 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/commonSealedWithPlatformInheritor.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // ISSUE: KT-45848
 // MODULE: m1-common
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.fir.kt
index f426941647b..5e97794092b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // ISSUE: KT-20306
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.kt
index 7af8c3e519a..0885e07654c 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectEnum.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // ISSUE: KT-20306
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.fir.kt
index 188decb0939..a1d270de619 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // ISSUE: KT-44474
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.kt
index 4d30025aadb..40b79d99749 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClass.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // ISSUE: KT-44474
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClassWithActualTypealias.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClassWithActualTypealias.kt
index 8c1a61eaaff..10bf294e58d 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClassWithActualTypealias.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedClassWithActualTypealias.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // ISSUE: KT-45796
 // SKIP_TXT
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.fir.kt
index d5cd3cfaf5b..1d5ef0265a6 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // ISSUE: KT-44474
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.kt
index 030e6c58300..866cb4caa75 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/expectSealedInterface.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // ISSUE: KT-44474
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.fir.kt
index dc688b7b0ed..80d21909659 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // ISSUE: KT-45796
 
 // MODULE: m1-common
diff --git a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.kt b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.kt
index 601ceff6ba6..34e2518998c 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/exhaustiveness/kt45796.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // ISSUE: KT-45796
 
 // MODULE: m1-common
diff --git a/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.fir.kt
index 66ca3c86597..6b2ab5ced75 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 // TODO: .fir.kt version is just a stub.
diff --git a/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.kt b/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.kt
index 3163a93a849..d77e3d8aeb8 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/expectInterfaceApplicability.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 // TODO: .fir.kt version is just a stub.
diff --git a/compiler/testData/diagnostics/tests/multiplatform/generic/functionTypeParameterBounds.kt b/compiler/testData/diagnostics/tests/multiplatform/generic/functionTypeParameterBounds.kt
index b16c3747b8f..ed40b8394b2 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/generic/functionTypeParameterBounds.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/generic/functionTypeParameterBounds.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/generic/genericMemberBounds.kt b/compiler/testData/diagnostics/tests/multiplatform/generic/genericMemberBounds.kt
index 9a6436f4c7d..800a41755a1 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/generic/genericMemberBounds.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/generic/genericMemberBounds.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/generic/membersInGenericClass.kt b/compiler/testData/diagnostics/tests/multiplatform/generic/membersInGenericClass.kt
index 4e4fd9939c0..77fef66723b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/generic/membersInGenericClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/generic/membersInGenericClass.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.fir.kt
index 66b7bd8f782..de2dfec1596 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.kt b/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.kt
index cddaaa8f222..f3cc841cc1f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/generic/typeParameterBoundsDifferentOrderActualMissing.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.fir.kt
index d2a8d82dd4e..119fd39e8bf 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.kt
index 0a8e4218575..9fbfa902edf 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDefaultValuesInAnnotationViaTypealias.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.fir.kt
index d0f2570445e..649563e8234 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.kt
index 00d7db5b984..8ba55f667dd 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualClassWithDifferentConstructors.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.fir.kt
index 34152949870..706414a06e9 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.kt
index 326195c6b3c..fdcd296eceb 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/actualMissing.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.fir.kt
index 5a849c42c94..d2e83bfe877 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.kt
index d053de3a37e..c70c601a7e3 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/baseExpectClassWithoutConstructor.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/classKinds.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/classKinds.kt
index 4bd2b91d784..cb7096addfb 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/classKinds.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/classKinds.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/dontOverrideMethodsFromInterfaceInCommonCode.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/dontOverrideMethodsFromInterfaceInCommonCode.kt
index 1b4541c3321..5be5669fa26 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/dontOverrideMethodsFromInterfaceInCommonCode.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/dontOverrideMethodsFromInterfaceInCommonCode.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithExplicitAbstractMember.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithExplicitAbstractMember.kt
index 7938a4d950e..e21846c9734 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithExplicitAbstractMember.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithExplicitAbstractMember.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -21,4 +20,4 @@ expect abstract class AbstractClass : Foo {
     abstract val baz: Int
 
     abstract override fun foo()
-}
\ No newline at end of file
+}
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithoutConstructor.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithoutConstructor.kt
index d2b7f04d66b..e12704f0e5a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithoutConstructor.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectClassWithoutConstructor.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.fir.kt
index e8ea7de0c4d..adc51bdb183 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.kt
index 43dc7199adb..3d4b3b69b95 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithStrongIncompatibilities.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.fir.kt
index e7ea59d4d0c..e3c19e4a891 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.kt
index a5a5475b2f1..2938e80f322 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectDeclarationWithWeakIncompatibilities.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectFinalActualOpen.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectFinalActualOpen.kt
index ac0c92f4523..ad833512297 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectFinalActualOpen.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/expectFinalActualOpen.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.fir.kt
index 6584b6fe29c..2c1ebda9443 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect open class A {
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.kt
index 0eac8ee13a3..89b17a77f25 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/explicitConstructorDelegation.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect open class A {
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.fir.kt
index 6903d6fe9d8..bee5a07d0f7 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.kt
index 984e8fc66ed..f6d270bcc8b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.fir.kt
index baf7482a770..acc2a467609 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.kt
index bc84bd1e6d9..e49d1b61c91 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithoutExplicitOverrideOfMethod.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.fir.kt
index 15862d94e8b..469992b7f4c 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.kt
index b09a6bba0ed..3e6bc346063 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extraHeaderOnMembers.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/functionAndPropertyWithSameName.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/functionAndPropertyWithSameName.kt
index 32e1bf555fd..cd9c285a66d 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/functionAndPropertyWithSameName.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/functionAndPropertyWithSameName.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.fir.kt
index d98db4f6acc..25cf58a109f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.fir.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -ACTUAL_WITHOUT_EXPECT
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.kt
index abaaffad912..9cbf2238141 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/genericClassImplTypeAlias.kt
@@ -1,5 +1,4 @@
 // !DIAGNOSTICS: -ACTUAL_WITHOUT_EXPECT
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassMember.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassMember.kt
index e0faa03d9a2..1d391ad8eca 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassMember.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassMember.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect class Foo {
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.fir.kt
index c05fa0c4ff5..9fc89185797 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect class Foo(
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.kt
index 7b39488f4b8..f6d046a310e 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/headerClassWithFunctionBody.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect class Foo(
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/implDataClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/implDataClass.kt
index 9fb24121517..578fa6a96b6 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/implDataClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/implDataClass.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/implOpenClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/implOpenClass.kt
index bc940141af6..b6e77172edf 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/implOpenClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/implOpenClass.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.fir.kt
index cd03ae5bf0f..864bba60d90 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -7,4 +6,4 @@ interface A
 class B : A
 expect class Foo(b: B) : A by b
 
-expect class Bar : A by B()
\ No newline at end of file
+expect class Bar : A by B()
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.kt
index 35b7099abf5..4f9383bb084 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/inheritanceByDelegationInExpectClass.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -7,4 +6,4 @@ interface A
 class B : A
 expect class Foo(b: B) : <!IMPLEMENTATION_BY_DELEGATION_IN_EXPECT_CLASS!>A by b<!>
 
-expect class Bar : <!IMPLEMENTATION_BY_DELEGATION_IN_EXPECT_CLASS!>A by B()<!>
\ No newline at end of file
+expect class Bar : <!IMPLEMENTATION_BY_DELEGATION_IN_EXPECT_CLASS!>A by B()<!>
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.fir.kt
index 892b56abdaa..1c116c0a971 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.kt
index 74f469447a6..7351a88b6aa 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/memberPropertyKinds.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.fir.kt
index 7e506fc49f5..e87cad7da82 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt
index 6a42bb20506..1855e214da3 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/modalityCheckForExplicitAndImplicitOverride.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.fir.kt
index d910ce8f090..f60649f095f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.kt
index 081dffdf70d..5fc72da0fdc 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActual.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActualViaTypeAlias.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActualViaTypeAlias.kt
index 16fd92514a1..9f8b23d1e84 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActualViaTypeAlias.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/morePermissiveVisibilityOnActualViaTypeAlias.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.fir.kt
index 94cd85c57c2..79d7baefc84 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.kt
index 9096ab4c073..6d0990b37d8 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClasses.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.fir.kt
index 1bd2c642f96..73044e2c9cd 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.kt
index 361b626835e..42b83ae4816 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/nestedClassesWithErrors.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.fir.kt
index f06b136f9c8..ab6d7684384 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
@@ -13,4 +12,4 @@ expect class Foo {
 actual class Foo {
     fun bar(): String = "bar"
     fun bas(g: Int) {}
-}
\ No newline at end of file
+}
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.kt
index 55fc6cb430b..0166935807a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/noImplKeywordOnMember.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.fir.kt
index 751b6f104d4..4104850d04a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.kt
index 1115732b734..a65a463e451 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/privateMembers.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/simpleHeaderClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/simpleHeaderClass.kt
index f47abc8d772..c2a75342f8f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/simpleHeaderClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/simpleHeaderClass.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect class Foo
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/smartCastOnExpectClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/smartCastOnExpectClass.kt
index cc5384f4fc2..4323c4ff6da 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/smartCastOnExpectClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/smartCastOnExpectClass.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.fir.kt
index ff212e1f801..bd6634ae7e5 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.kt
index 4c0c7eb586b..9e29bc1b084 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/superClass.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.fir.kt
index f542ed05f17..5745558b1fb 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.kt b/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.kt
index 8a0ec3293df..127a19e05f6 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerFunInNonHeaderClass.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.fir.kt
index 1a02e9cd7ed..03d8d7876d0 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 
 // MODULE: common
 // TARGET_PLATFORM: Common
diff --git a/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.kt b/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.kt
index 09feb594e32..f05c19b42b3 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/hmpp/sealedInheritorsInComplexModuleStructure.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 
 // MODULE: common
 // TARGET_PLATFORM: Common
diff --git a/compiler/testData/diagnostics/tests/multiplatform/hmpp/simple.kt b/compiler/testData/diagnostics/tests/multiplatform/hmpp/simple.kt
index 71e7525da83..957667347bb 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/hmpp/simple.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/hmpp/simple.kt
@@ -5,7 +5,6 @@
  * Js backend is ignored because they use old test infrastructure which doesn't support HMPP
  */
 
-// !LANGUAGE: +MultiPlatformProjects
 
 // IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
diff --git a/compiler/testData/diagnostics/tests/multiplatform/implDelegatedMember.kt b/compiler/testData/diagnostics/tests/multiplatform/implDelegatedMember.kt
index 4fd830ec7fe..0681dd8ba6a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/implDelegatedMember.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/implDelegatedMember.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/implDynamic.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/implDynamic.fir.kt
index ab745196cff..95cf62ad94b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/implDynamic.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/implDynamic.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNSUPPORTED
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/implDynamic.kt b/compiler/testData/diagnostics/tests/multiplatform/implDynamic.kt
index 06012e5431e..7d4289cd403 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/implDynamic.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/implDynamic.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -UNSUPPORTED
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/implFakeOverride.kt b/compiler/testData/diagnostics/tests/multiplatform/implFakeOverride.kt
index 90e673c50c4..b1da3314aad 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/implFakeOverride.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/implFakeOverride.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/incompatibles.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/incompatibles.fir.kt
index 563ff397118..9665559832c 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/incompatibles.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/incompatibles.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 
 <!DEPRECATED_MODIFIER, INCOMPATIBLE_MODIFIERS!>header<!> <!INCOMPATIBLE_MODIFIERS!>impl<!> class First
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt b/compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt
index 91bab1b0acc..a6fecf37452 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 
 <!DEPRECATED_MODIFIER, INCOMPATIBLE_MODIFIERS!>header<!> <!INCOMPATIBLE_MODIFIERS!>impl<!> class <!NO_ACTUAL_FOR_EXPECT!>First<!>
 
@@ -10,4 +9,4 @@
 
 <!DEPRECATED_MODIFIER, INCOMPATIBLE_MODIFIERS!>impl<!> <!INCOMPATIBLE_MODIFIERS!>actual<!> class <!ACTUAL_WITHOUT_EXPECT!>Fifth<!>
 
-<!INCOMPATIBLE_MODIFIERS!>expect<!> <!INCOMPATIBLE_MODIFIERS!>actual<!> class <!NO_ACTUAL_FOR_EXPECT!>Sixth<!>
\ No newline at end of file
+<!INCOMPATIBLE_MODIFIERS!>expect<!> <!INCOMPATIBLE_MODIFIERS!>actual<!> class <!NO_ACTUAL_FOR_EXPECT!>Sixth<!>
diff --git a/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.fir.kt
index 432b6333128..668943dac2b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +MultiPlatformProjects, +InlineClasses, -JvmInlineValueClasses
+// !LANGUAGE: +InlineClasses, -JvmInlineValueClasses
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.kt b/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.kt
index 9f8199b1e06..91e0c75341a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/expectActualInlineClass.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +MultiPlatformProjects, +InlineClasses, -JvmInlineValueClasses
+// !LANGUAGE: +InlineClasses, -JvmInlineValueClasses
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/jvmInlineExpectValueClass.kt b/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/jvmInlineExpectValueClass.kt
index b1daf22e634..ced8d3df7f5 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/jvmInlineExpectValueClass.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/inlineClasses/jvmInlineExpectValueClass.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // SKIP_TXT
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/java/flexibleTypes.kt b/compiler/testData/diagnostics/tests/multiplatform/java/flexibleTypes.kt
index d6c6e43f37b..78871917df9 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/java/flexibleTypes.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/java/flexibleTypes.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/java/parameterNames.kt b/compiler/testData/diagnostics/tests/multiplatform/java/parameterNames.kt
index ae231ddc9e3..6ede9f75ef1 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/java/parameterNames.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/java/parameterNames.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.fir.kt
index e5a164e43d7..6240999700a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.kt b/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.kt
index 4cc83cae292..2bb567aa109 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/modifierApplicability.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/namedArguments.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/namedArguments.fir.kt
index be5be893aa0..cdda3cab878 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/namedArguments.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/namedArguments.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/namedArguments.kt b/compiler/testData/diagnostics/tests/multiplatform/namedArguments.kt
index 208487f3414..25005f2b91f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/namedArguments.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/namedArguments.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.fir.kt
index 98f3d8bce48..2ed710c64ae 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.kt b/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.kt
index dfbb729094f..b8535fc41a9 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/privateTopLevelDeclarations.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.kt b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.kt
index d0e5a6234e4..e62094269af 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.kt b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.kt
index 49aca7a6bf7..bce59c8065b 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callHeaderFun.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callHeaderFun.kt
index a1eb0132ddb..a3979052c7f 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callHeaderFun.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callHeaderFun.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.fir.kt
index 7622bbd7d38..a1ccd06a875 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.kt
index 694a66f1772..e1b5b8ba1b8 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/callableReferenceOnExpectFun.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingHeaderDeclarations.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingHeaderDeclarations.kt
index 9932503cc86..d2b4e8df486 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingHeaderDeclarations.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingHeaderDeclarations.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.fir.kt
index 54addebdd73..bddb9607ec1 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.kt
index 73c017f9f80..9c4050af202 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/conflictingImplDeclarations.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/functionModifiers.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/functionModifiers.kt
index fe5d17234b3..66967484afd 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/functionModifiers.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/functionModifiers.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -NOTHING_TO_INLINE
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.fir.kt
index ec334a67cd0..7518eaab7ac 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 package common
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.kt
index 2d239f97bd4..653748beaa6 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerAndImplInDIfferentPackages.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 package common
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerDeclarationWithBody.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerDeclarationWithBody.kt
index 80e55c41d2a..e39f33493c9 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerDeclarationWithBody.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerDeclarationWithBody.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerWithoutImpl.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerWithoutImpl.kt
index 491933a59d9..d6af6ee53f9 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerWithoutImpl.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/headerWithoutImpl.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.fir.kt
index 4aa5dc4d9e5..c8f4474ef75 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.kt
index 933f763d04d..bf33fd9d376 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implDeclarationWithoutBody.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.fir.kt
index bcad4bd6c2f..056778a1633 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-jvm
 // FILE: jvm.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.kt
index bf4348aeddb..040b35189fe 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/implWithoutHeader.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-jvm
 // FILE: jvm.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.fir.kt
index 7e7de1435e0..94d0de397a4 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.kt
index 59ffd1a6ff1..cbc71682fc0 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/inlineFun.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/simpleHeaderFun.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/simpleHeaderFun.kt
index 60c721ba7e3..87dbbc3b803 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/simpleHeaderFun.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/simpleHeaderFun.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect fun foo()
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.fir.kt
index b1c7ea1ff53..8d3120838af 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.fir.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -NOTHING_TO_INLINE
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.kt
index d002d0baea8..38f60745643 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelFun/valueParameterModifiers.kt
@@ -1,4 +1,3 @@
-// !LANGUAGE: +MultiPlatformProjects
 // !DIAGNOSTICS: -NOTHING_TO_INLINE
 // MODULE: m1-common
 // FILE: common.kt
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.fir.kt
index edc3f838c42..7b0747618fd 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.fir.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.fir.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +MultiPlatformProjects +LateinitTopLevelProperties
+// !LANGUAGE: +LateinitTopLevelProperties
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.kt
index e73e201c4b4..a65c504de00 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/differentKindsOfProperties.kt
@@ -1,4 +1,4 @@
-// !LANGUAGE: +MultiPlatformProjects +LateinitTopLevelProperties
+// !LANGUAGE: +LateinitTopLevelProperties
 // MODULE: m1-common
 // FILE: common.kt
 
diff --git a/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/simpleHeaderVar.kt b/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/simpleHeaderVar.kt
index 442f5558d7e..ad0e33f0975 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/simpleHeaderVar.kt
+++ b/compiler/testData/diagnostics/tests/multiplatform/topLevelProperty/simpleHeaderVar.kt
@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +MultiPlatformProjects
 // MODULE: m1-common
 // FILE: common.kt
 expect var foo: String
diff --git a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractDiagnosticTest.kt b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractDiagnosticTest.kt
index 569e7bcb2d9..4113f047f19 100644
--- a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractDiagnosticTest.kt
+++ b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractDiagnosticTest.kt
@@ -117,6 +117,12 @@ abstract class AbstractDiagnosticTest : AbstractKotlinCompilerTest() {
             }
         }
 
+        forTestsMatching("compiler/testData/diagnostics/tests/multiplatform/*") {
+            defaultDirectives {
+                LANGUAGE with "+MultiPlatformProjects"
+            }
+        }
+
         // ----------------------- constant evaluation tests -----------------------
         forTestsMatching("compiler/testData/diagnostics/tests/constantEvaluator/*") {
             defaultDirectives {
diff --git a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractFirDiagnosticTest.kt b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractFirDiagnosticTest.kt
index c35f743acb1..e818e277d9f 100644
--- a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractFirDiagnosticTest.kt
+++ b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractFirDiagnosticTest.kt
@@ -146,4 +146,10 @@ fun TestConfigurationBuilder.baseFirDiagnosticTestConfiguration(
             LANGUAGE with "+ExplicitBackingFields"
         }
     }
+
+    forTestsMatching("compiler/testData/diagnostics/tests/multiplatform/*") {
+        defaultDirectives {
+            LANGUAGE with "+MultiPlatformProjects"
+        }
+    }
 }