diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
index 152049a8f56..5749ee5d155 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
@@ -24415,12 +24415,6 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                 runTest("compiler/testData/diagnostics/tests/sealed/NeverFinal.kt");
             }
 
-            @Test
-            @TestMetadata("NeverInterface.kt")
-            public void testNeverInterface() throws Exception {
-                runTest("compiler/testData/diagnostics/tests/sealed/NeverInterface.kt");
-            }
-
             @Test
             @TestMetadata("NeverObject.kt")
             public void testNeverObject() throws Exception {
@@ -27255,12 +27249,6 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                 runTest("compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.kt");
             }
 
-            @Test
-            @TestMetadata("noTopLevelSealedInheritance.kt")
-            public void testNoTopLevelSealedInheritance() throws Exception {
-                runTest("compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.kt");
-            }
-
             @Nested
             @TestMetadata("compiler/testData/diagnostics/tests/sourceCompatibility/apiVersion")
             @TestDataPath("$PROJECT_ROOT")
diff --git a/compiler/testData/diagnostics/tests/checkArguments/SpreadVarargs.kt b/compiler/testData/diagnostics/tests/checkArguments/SpreadVarargs.kt
index 926cddf106e..1193a21ebac 100644
--- a/compiler/testData/diagnostics/tests/checkArguments/SpreadVarargs.kt
+++ b/compiler/testData/diagnostics/tests/checkArguments/SpreadVarargs.kt
@@ -25,9 +25,9 @@ fun main() {
     join(1, "4", *a)
     join(1, "4", *a, *a, "3")
     join(1, "4", *a, *<!TYPE_MISMATCH!>b<!>, "3")
-    join(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS{NI}!>a = a<!>, x = 1)
-    join(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS{NI}!>a = <!TYPE_MISMATCH!>b<!><!>, x = 1)
-    join(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS{NI}!>a = a<!>, x = 1)
+    join(a = a, x = 1)
+    join(a = <!TYPE_MISMATCH!>b<!>, x = 1)
+    join(a = a, x = 1)
 
     joinG<String>(1, "2")
     joinG<String>(<!NON_VARARG_SPREAD!>*<!>1, "2")
@@ -40,7 +40,7 @@ fun main() {
     joinG<String>(1, "4", *a, "3")
     joinG<String>(1, "4", *a)
     joinG<String>(1, "4", *a, *a, "3")
-    joinG<String>(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS{NI}!>a = a<!>, x = 1)
+    joinG<String>(a = a, x = 1)
 
     joinG(1, "2")
     joinG(<!NON_VARARG_SPREAD!>*<!>1, "2")
@@ -53,7 +53,7 @@ fun main() {
     joinG(1, "4", *a, "3")
     joinG(1, "4", *a)
     joinG(1, "4", *a, *a, "3")
-    joinG(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS{NI}!>a = a<!>, x = 1)
+    joinG(a = a, x = 1)
 
     val x1 = joinT(1, "2")
     checkSubtype<String?>(x1)
@@ -69,7 +69,7 @@ fun main() {
     checkSubtype<String?>(x9)
     val x10 = joinT(1, "4", *a, *a, "3")
     checkSubtype<String?>(x10)
-    val x11 = joinT(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS{NI}!>a = a<!>, x = 1)
+    val x11 = joinT(a = a, x = 1)
     checkSubtype<String?>(x11)
     val x12 = joinT(x = 1, a = a)
     checkSubtype<String?>(x12)
diff --git a/compiler/testData/diagnostics/tests/dataClasses/sealedDataClass.txt b/compiler/testData/diagnostics/tests/dataClasses/sealedDataClass.txt
index 5a1f87b58de..843867f4337 100644
--- a/compiler/testData/diagnostics/tests/dataClasses/sealedDataClass.txt
+++ b/compiler/testData/diagnostics/tests/dataClasses/sealedDataClass.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed data class My {
-    private constructor My(/*0*/ x: kotlin.Int)
+    internal constructor My(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public final operator /*synthesized*/ fun component1(): kotlin.Int
     public final /*synthesized*/ fun copy(/*0*/ x: kotlin.Int = ...): My
@@ -29,3 +29,4 @@ public sealed data class My {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/generics/starProjections/foldRecursiveTypesToStarProjection.txt b/compiler/testData/diagnostics/tests/generics/starProjections/foldRecursiveTypesToStarProjection.txt
index a3462779ed6..9e03553cdbf 100644
--- a/compiler/testData/diagnostics/tests/generics/starProjections/foldRecursiveTypesToStarProjection.txt
+++ b/compiler/testData/diagnostics/tests/generics/starProjections/foldRecursiveTypesToStarProjection.txt
@@ -77,30 +77,31 @@ public object KT32183 {
     }
 
     public sealed class ProjectJob {
-        private constructor ProjectJob()
+        internal constructor ProjectJob()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
         public sealed class Process</*0*/ E : KT32183.ProjectJob.ProcessExecutable<E>, /*1*/ R : KT32183.ProjectJob.ProcessResources<R>> : KT32183.ProjectJob {
-            private constructor Process</*0*/ E : KT32183.ProjectJob.ProcessExecutable<E>, /*1*/ R : KT32183.ProjectJob.ProcessResources<R>>()
+            internal constructor Process</*0*/ E : KT32183.ProjectJob.ProcessExecutable<E>, /*1*/ R : KT32183.ProjectJob.ProcessResources<R>>()
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
             public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
         }
 
         public sealed class ProcessExecutable</*0*/ E : KT32183.ProjectJob.ProcessExecutable<E>> {
-            private constructor ProcessExecutable</*0*/ E : KT32183.ProjectJob.ProcessExecutable<E>>()
+            internal constructor ProcessExecutable</*0*/ E : KT32183.ProjectJob.ProcessExecutable<E>>()
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
             public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
         }
 
         public sealed class ProcessResources</*0*/ R : KT32183.ProjectJob.ProcessResources<R>> {
-            private constructor ProcessResources</*0*/ R : KT32183.ProjectJob.ProcessResources<R>>()
+            internal constructor ProcessResources</*0*/ R : KT32183.ProjectJob.ProcessResources<R>>()
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
             public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/inference/nothingType/kt32388.txt b/compiler/testData/diagnostics/tests/inference/nothingType/kt32388.txt
index 790a1da91cd..77f67644feb 100644
--- a/compiler/testData/diagnostics/tests/inference/nothingType/kt32388.txt
+++ b/compiler/testData/diagnostics/tests/inference/nothingType/kt32388.txt
@@ -4,7 +4,7 @@ public fun </*0*/ A, /*1*/ B> Either<A, B>.recover(/*0*/ f: (A) -> B): Either<A,
 public fun </*0*/ A> A.right(): Either<kotlin.Nothing, A>
 
 public sealed class Either</*0*/ out A, /*1*/ out B> {
-    private constructor Either</*0*/ out A, /*1*/ out B>()
+    internal constructor Either</*0*/ out A, /*1*/ out B>()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -25,3 +25,4 @@ public sealed class Either</*0*/ out A, /*1*/ out B> {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/inlineClasses/inlineClassDeclarationCheck.txt b/compiler/testData/diagnostics/tests/inlineClasses/inlineClassDeclarationCheck.txt
index 0933b86cc72..d5932702482 100644
--- a/compiler/testData/diagnostics/tests/inlineClasses/inlineClassDeclarationCheck.txt
+++ b/compiler/testData/diagnostics/tests/inlineClasses/inlineClassDeclarationCheck.txt
@@ -174,7 +174,7 @@ public abstract inline class D2 {
 }
 
 public sealed inline class D3 {
-    private constructor D3(/*0*/ x: kotlin.Int)
+    internal constructor D3(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*synthesized*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
@@ -190,3 +190,4 @@ public final data inline class D4 {
     public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/javac/inners/Nested.txt b/compiler/testData/diagnostics/tests/javac/inners/Nested.txt
index 53795353575..9b8503cf487 100644
--- a/compiler/testData/diagnostics/tests/javac/inners/Nested.txt
+++ b/compiler/testData/diagnostics/tests/javac/inners/Nested.txt
@@ -21,13 +21,13 @@ package p {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
         public sealed class Sealed1 {
-            private constructor Sealed1()
+            internal constructor Sealed1()
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
             public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
             public sealed class Sealed2 {
-                private constructor Sealed2()
+                internal constructor Sealed2()
                 public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
                 public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
                 public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -35,3 +35,4 @@ package p {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/modifiers/IllegalModifiers.txt b/compiler/testData/diagnostics/tests/modifiers/IllegalModifiers.txt
index 7c5153ea00c..18f8bd789ee 100644
--- a/compiler/testData/diagnostics/tests/modifiers/IllegalModifiers.txt
+++ b/compiler/testData/diagnostics/tests/modifiers/IllegalModifiers.txt
@@ -155,7 +155,7 @@ package illegal_modifiers {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
         public sealed inner class Inner {
-            private constructor Inner()
+            internal constructor Inner()
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
             public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -176,3 +176,4 @@ package illegal_modifiers {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/multimodule/redundantElseInWhen.txt b/compiler/testData/diagnostics/tests/multimodule/redundantElseInWhen.txt
index f15679a2cab..4fab4c6ad6e 100644
--- a/compiler/testData/diagnostics/tests/multimodule/redundantElseInWhen.txt
+++ b/compiler/testData/diagnostics/tests/multimodule/redundantElseInWhen.txt
@@ -30,7 +30,7 @@ package test {
     }
 
     public sealed class S {
-        private constructor S()
+        internal constructor S()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
diff --git a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.txt b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.txt
index b476ae9b950..8e6a3c4f8e7 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.txt
+++ b/compiler/testData/diagnostics/tests/multiplatform/headerClass/extendExpectedClassWithAbstractMember.txt
@@ -70,7 +70,7 @@ public expect interface BaseE {
 }
 
 public sealed class BaseEImpl : BaseE {
-    private constructor BaseEImpl()
+    internal constructor BaseEImpl()
     public final fun bar(): kotlin.Unit
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public abstract expect override /*1*/ /*fake_override*/ fun foo(): kotlin.Unit
@@ -140,3 +140,4 @@ public final class DerivedC2 : BaseCImpl {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.txt b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.txt
index 74e8c79ce25..36e27006142 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.txt
+++ b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.txt
@@ -23,7 +23,7 @@ public sealed expect class Presence {
 package
 
 public sealed class P {
-    private constructor P()
+    internal constructor P()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
diff --git a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.txt b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.txt
index 8a518d78c8c..16eaf0abd1a 100644
--- a/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.txt
+++ b/compiler/testData/diagnostics/tests/multiplatform/sealedTypeAliasTopLevel.txt
@@ -37,7 +37,7 @@ public actual object Online : P {
 }
 
 public sealed class P {
-    private constructor P()
+    internal constructor P()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
diff --git a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt
index 18e4c5d763f..8e171bdd5c0 100644
--- a/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt
+++ b/compiler/testData/diagnostics/tests/namedArguments/mixedNamedPosition/varargs.kt
@@ -29,12 +29,12 @@ fun foo4(
 
 fun main() {
     foo1(1, 2, p2 = "3", <!MIXING_NAMED_AND_POSITIONED_ARGUMENTS!>4.0<!><!NO_VALUE_FOR_PARAMETER!>)<!>
-    foo1(<!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS!>p1 = intArrayOf(1, 2)<!>, "3", p3 = 4.0)
+    foo1(p1 = intArrayOf(1, 2), "3", p3 = 4.0)
 
     foo1(p2 = "3", <!MIXING_NAMED_AND_POSITIONED_ARGUMENTS!>4.0<!><!NO_VALUE_FOR_PARAMETER!>)<!>
 
     foo2(p1 = 1, "2", "3", p3 = 4.0)
-    foo2(1, <!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS!>p2 = arrayOf("2", "3")<!>, 4.0)
+    foo2(1, p2 = arrayOf("2", "3"), 4.0)
     foo2(1, p3 = 3.0)
 
     foo3(p1 = 1, "2", 3.0, 4.0)
@@ -52,6 +52,6 @@ fun main() {
     foo2(1, p3 = 2.0, <!MIXING_NAMED_AND_POSITIONED_ARGUMENTS!>*arrayOf("3", "4")<!>)
     foo2(1, p3 = 2.0, p2 = arrayOf("3", "4"))
 
-    foo3(1, <!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS!>p3 = doubleArrayOf(2.0, 3.0)<!>, <!MIXING_NAMED_AND_POSITIONED_ARGUMENTS!>"4"<!><!NO_VALUE_FOR_PARAMETER!>)<!>
-    foo3(1, <!CHANGING_ARGUMENTS_EXECUTION_ORDER_FOR_NAMED_VARARGS!>p3 = doubleArrayOf(2.0, 3.0)<!>, p2 = "4")
+    foo3(1, p3 = doubleArrayOf(2.0, 3.0), <!MIXING_NAMED_AND_POSITIONED_ARGUMENTS!>"4"<!><!NO_VALUE_FOR_PARAMETER!>)<!>
+    foo3(1, p3 = doubleArrayOf(2.0, 3.0), p2 = "4")
 }
diff --git a/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.kt b/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.kt
index f7a662f468b..2600c6bd87a 100644
--- a/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.kt
+++ b/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.kt
@@ -1,10 +1,10 @@
 sealed class Base
 
 class Derived: Base() {
-    class Derived2: <!INVISIBLE_MEMBER, SEALED_SUPERTYPE!>Base<!>()
+    class Derived2: Base()
 }
 
 fun test() {
-    class Local: <!INVISIBLE_MEMBER, SEALED_SUPERTYPE!>Base<!>()
+    class Local: <!SEALED_SUPERTYPE!>Base<!>()
 }
 
diff --git a/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.txt b/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.txt
index 8c7dbf3d5aa..7f1ab161a05 100644
--- a/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.txt
+++ b/compiler/testData/diagnostics/tests/sealed/DerivedTopLevel.txt
@@ -3,7 +3,7 @@ package
 public fun test(): kotlin.Unit
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -22,3 +22,4 @@ public final class Derived : Base {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/DoubleInner.txt b/compiler/testData/diagnostics/tests/sealed/DoubleInner.txt
index 67b084f0918..050d26bc834 100644
--- a/compiler/testData/diagnostics/tests/sealed/DoubleInner.txt
+++ b/compiler/testData/diagnostics/tests/sealed/DoubleInner.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -50,3 +50,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnRoot.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnRoot.txt
index 48902800437..425b7c75ed6 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnRoot.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnRoot.txt
@@ -5,7 +5,7 @@ public fun test2(/*0*/ x: Stmt): kotlin.String
 public fun test3(/*0*/ x: Expr): kotlin.String
 
 public sealed class Expr : Stmt {
-    private constructor Expr()
+    internal constructor Expr()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -26,8 +26,9 @@ public final class ForStmt : Stmt {
 }
 
 public sealed class Stmt {
-    private constructor Stmt()
+    internal constructor Stmt()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTree.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTree.txt
index afa4a4d3207..2559c794d81 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTree.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTree.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public final fun bar(): kotlin.Int
     public final fun baz(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -11,7 +11,7 @@ public sealed class Base {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     public sealed class A : Base {
-        private constructor A()
+        internal constructor A()
         public final override /*1*/ /*fake_override*/ fun bar(): kotlin.Int
         public final override /*1*/ /*fake_override*/ fun baz(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -32,7 +32,7 @@ public sealed class Base {
         }
 
         public sealed class A2 : Base.A {
-            private constructor A2()
+            internal constructor A2()
             public final override /*1*/ /*fake_override*/ fun bar(): kotlin.Int
             public final override /*1*/ /*fake_override*/ fun baz(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -44,7 +44,7 @@ public sealed class Base {
     }
 
     public sealed class B : Base {
-        private constructor B()
+        internal constructor B()
         public final override /*1*/ /*fake_override*/ fun bar(): kotlin.Int
         public final override /*1*/ /*fake_override*/ fun baz(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -54,7 +54,7 @@ public sealed class Base {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
         public sealed class B1 : Base.B {
-            private constructor B1()
+            internal constructor B1()
             public final override /*1*/ /*fake_override*/ fun bar(): kotlin.Int
             public final override /*1*/ /*fake_override*/ fun baz(): kotlin.Int
             public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -76,3 +76,4 @@ public sealed class Base {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTriangleStar.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTriangleStar.txt
index d093f4f9b27..ed10fcf8de7 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTriangleStar.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveOnTriangleStar.txt
@@ -5,14 +5,14 @@ public fun test2(/*0*/ a: A): kotlin.Any
 public fun test3(/*0*/ a: A): kotlin.Any
 
 public sealed class A {
-    private constructor A()
+    internal constructor A()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
 public sealed class B : A {
-    private constructor B()
+    internal constructor B()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -31,3 +31,4 @@ public final class D : B {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhen.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhen.txt
index 22dbcb824c9..6052d5fbd87 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhen.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhen.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -44,3 +44,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenDoubleInner.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenDoubleInner.txt
index 148441cbfd3..cd86b738170 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenDoubleInner.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenDoubleInner.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -43,3 +43,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenMultipleInner.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenMultipleInner.txt
index fa09d1fe85b..353be8f9350 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenMultipleInner.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenMultipleInner.txt
@@ -6,7 +6,7 @@ public fun fooWithElse(/*0*/ s: Sealed): kotlin.Int
 public fun fooWithoutElse(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -67,3 +67,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegated.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegated.txt
index 22dbcb824c9..6052d5fbd87 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegated.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegated.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -44,3 +44,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.txt
index 7d59920c4e0..9822f3cd0f9 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -52,3 +52,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNestedSealed.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNestedSealed.txt
index a917d1e29c1..b352827f224 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNestedSealed.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNestedSealed.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed, /*1*/ nf: Sealed.NonFirst): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -16,7 +16,7 @@ public sealed class Sealed {
     }
 
     public sealed class NonFirst {
-        private constructor NonFirst()
+        internal constructor NonFirst()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -43,3 +43,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNullable.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNullable.txt
index a87f45ed06f..3e989e300bb 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNullable.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenOnNullable.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed?): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -44,3 +44,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithAdditionalMember.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithAdditionalMember.txt
index b8887b3f613..5abe4e1702c 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithAdditionalMember.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithAdditionalMember.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -56,3 +56,4 @@ public sealed class Sealed {
         public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithElse.txt b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithElse.txt
index 22dbcb824c9..6052d5fbd87 100644
--- a/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithElse.txt
+++ b/compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenWithElse.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -44,3 +44,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/Local.txt b/compiler/testData/diagnostics/tests/sealed/Local.txt
index 3eb8bb9345e..bbb25c8a302 100644
--- a/compiler/testData/diagnostics/tests/sealed/Local.txt
+++ b/compiler/testData/diagnostics/tests/sealed/Local.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public final val p: Sealed
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -42,3 +42,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NestedSealed.txt b/compiler/testData/diagnostics/tests/sealed/NestedSealed.txt
index 5860a568d5f..10a7db9e368 100644
--- a/compiler/testData/diagnostics/tests/sealed/NestedSealed.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NestedSealed.txt
@@ -5,13 +5,13 @@ public fun foo(/*0*/ b: Base): kotlin.Int
 public fun gav(/*0*/ b: Base?): kotlin.Int
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     public sealed class A : Base {
-        private constructor A()
+        internal constructor A()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -32,7 +32,7 @@ public sealed class Base {
     }
 
     public sealed class B : Base {
-        private constructor B()
+        internal constructor B()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -52,3 +52,4 @@ public sealed class Base {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverConstructed.txt b/compiler/testData/diagnostics/tests/sealed/NeverConstructed.txt
index 3c9d5cefd04..f210e874257 100644
--- a/compiler/testData/diagnostics/tests/sealed/NeverConstructed.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NeverConstructed.txt
@@ -1,9 +1,10 @@
 package
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public final fun foo(): Base
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.kt b/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.kt
index f3a378e55a3..b7342a1c323 100644
--- a/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.kt
+++ b/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.kt
@@ -2,8 +2,8 @@ class A {
     sealed class Base
 }
 
-class Derived : <!INVISIBLE_MEMBER, SEALED_SUPERTYPE!>A.Base<!>()
+class Derived : A.Base()
 
 fun test() {
-    class DerivedLocal : <!INVISIBLE_MEMBER, SEALED_SUPERTYPE!>A.Base<!>()
+    class DerivedLocal : <!SEALED_SUPERTYPE!>A.Base<!>()
 }
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.txt b/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.txt
index 06081addd8b..faaa729b10a 100644
--- a/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NeverDerivedFromNested.txt
@@ -9,7 +9,7 @@ public final class A {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     public sealed class Base {
-        private constructor Base()
+        internal constructor Base()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -22,3 +22,4 @@ public final class Derived : A.Base {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverFinal.txt b/compiler/testData/diagnostics/tests/sealed/NeverFinal.txt
index bb9b3fc8d1c..4f963ec4c07 100644
--- a/compiler/testData/diagnostics/tests/sealed/NeverFinal.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NeverFinal.txt
@@ -1,8 +1,9 @@
 package
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverInterface.fir.kt b/compiler/testData/diagnostics/tests/sealed/NeverInterface.fir.kt
deleted file mode 100644
index d70b4d3f01b..00000000000
--- a/compiler/testData/diagnostics/tests/sealed/NeverInterface.fir.kt
+++ /dev/null
@@ -1,3 +0,0 @@
-sealed interface Base {
-
-}
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverInterface.kt b/compiler/testData/diagnostics/tests/sealed/NeverInterface.kt
deleted file mode 100644
index b22a4a90a43..00000000000
--- a/compiler/testData/diagnostics/tests/sealed/NeverInterface.kt
+++ /dev/null
@@ -1,3 +0,0 @@
-<!WRONG_MODIFIER_TARGET!>sealed<!> interface Base {
-
-}
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverInterface.txt b/compiler/testData/diagnostics/tests/sealed/NeverInterface.txt
deleted file mode 100644
index f2ed48d03d4..00000000000
--- a/compiler/testData/diagnostics/tests/sealed/NeverInterface.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-package
-
-public sealed interface Base {
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-}
diff --git a/compiler/testData/diagnostics/tests/sealed/NeverOpen.txt b/compiler/testData/diagnostics/tests/sealed/NeverOpen.txt
index bb9b3fc8d1c..4f963ec4c07 100644
--- a/compiler/testData/diagnostics/tests/sealed/NeverOpen.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NeverOpen.txt
@@ -1,8 +1,9 @@
 package
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhen.txt b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhen.txt
index 22dbcb824c9..6052d5fbd87 100644
--- a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhen.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhen.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -44,3 +44,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenNegated.txt b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenNegated.txt
index 22dbcb824c9..6052d5fbd87 100644
--- a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenNegated.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenNegated.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -44,3 +44,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAdditionalCase.txt b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAdditionalCase.txt
index 3b3b7d2df39..33444b8be1b 100644
--- a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAdditionalCase.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAdditionalCase.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed(/*0*/ x: kotlin.Int)
+    internal constructor Sealed(/*0*/ x: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -61,3 +61,4 @@ public sealed class Sealed {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAnyCase.txt b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAnyCase.txt
index 9a98e4af50f..fa27bc4811d 100644
--- a/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAnyCase.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NonExhaustiveWhenWithAnyCase.txt
@@ -3,7 +3,7 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -36,3 +36,4 @@ public sealed class Sealed {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NonPrivateConstructor.txt b/compiler/testData/diagnostics/tests/sealed/NonPrivateConstructor.txt
index 0a27f00ee97..18a46c7808f 100644
--- a/compiler/testData/diagnostics/tests/sealed/NonPrivateConstructor.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NonPrivateConstructor.txt
@@ -3,7 +3,7 @@ package
 public sealed class Sealed {
     public constructor Sealed()
     protected constructor Sealed(/*0*/ x: kotlin.Int)
-    private constructor Sealed(/*0*/ y: kotlin.Int, /*1*/ z: kotlin.Int)
+    internal constructor Sealed(/*0*/ y: kotlin.Int, /*1*/ z: kotlin.Int)
     public final val x: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -17,3 +17,4 @@ public sealed class Sealed {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/NotFinal.txt b/compiler/testData/diagnostics/tests/sealed/NotFinal.txt
index 3d5953b9dfc..23ce8ce7f29 100644
--- a/compiler/testData/diagnostics/tests/sealed/NotFinal.txt
+++ b/compiler/testData/diagnostics/tests/sealed/NotFinal.txt
@@ -3,7 +3,7 @@ package
 public fun </*0*/ T : Foo> doit(/*0*/ arg: T): T
 
 public sealed class Foo {
-    private constructor Foo()
+    internal constructor Foo()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -22,3 +22,4 @@ public sealed class Foo {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/OperationWhen.txt b/compiler/testData/diagnostics/tests/sealed/OperationWhen.txt
index 3505739dea2..cebdb6ea323 100644
--- a/compiler/testData/diagnostics/tests/sealed/OperationWhen.txt
+++ b/compiler/testData/diagnostics/tests/sealed/OperationWhen.txt
@@ -3,7 +3,7 @@ package
 public fun priority(/*0*/ op: Operation): kotlin.Int
 
 public sealed class Operation {
-    private constructor Operation(/*0*/ left: kotlin.Int, /*1*/ right: kotlin.Int)
+    internal constructor Operation(/*0*/ left: kotlin.Int, /*1*/ right: kotlin.Int)
     public final val left: kotlin.Int
     public final val right: kotlin.Int
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -51,3 +51,4 @@ public sealed class Operation {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/RedundantAbstract.txt b/compiler/testData/diagnostics/tests/sealed/RedundantAbstract.txt
index bb9b3fc8d1c..4f963ec4c07 100644
--- a/compiler/testData/diagnostics/tests/sealed/RedundantAbstract.txt
+++ b/compiler/testData/diagnostics/tests/sealed/RedundantAbstract.txt
@@ -1,8 +1,9 @@
 package
 
 public sealed class Base {
-    private constructor Base()
+    internal constructor Base()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/TreeWhen.txt b/compiler/testData/diagnostics/tests/sealed/TreeWhen.txt
index bc46a439415..0b16ddc38f4 100644
--- a/compiler/testData/diagnostics/tests/sealed/TreeWhen.txt
+++ b/compiler/testData/diagnostics/tests/sealed/TreeWhen.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed class Tree {
-    private constructor Tree()
+    internal constructor Tree()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public final fun max(): kotlin.Int
@@ -34,3 +34,4 @@ public sealed class Tree {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctional.txt b/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctional.txt
index bc46a439415..0b16ddc38f4 100644
--- a/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctional.txt
+++ b/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctional.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed class Tree {
-    private constructor Tree()
+    internal constructor Tree()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public final fun max(): kotlin.Int
@@ -34,3 +34,4 @@ public sealed class Tree {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctionalNoIs.txt b/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctionalNoIs.txt
index 8a1ace58713..64955fd0483 100644
--- a/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctionalNoIs.txt
+++ b/compiler/testData/diagnostics/tests/sealed/TreeWhenFunctionalNoIs.txt
@@ -1,7 +1,7 @@
 package
 
 public sealed class Tree {
-    private constructor Tree()
+    internal constructor Tree()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public final fun max(): kotlin.Int
@@ -42,3 +42,4 @@ public sealed class Tree {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/WhenOnEmptySealed.txt b/compiler/testData/diagnostics/tests/sealed/WhenOnEmptySealed.txt
index 87745e29ea5..50319d715ed 100644
--- a/compiler/testData/diagnostics/tests/sealed/WhenOnEmptySealed.txt
+++ b/compiler/testData/diagnostics/tests/sealed/WhenOnEmptySealed.txt
@@ -3,8 +3,9 @@ package
 public fun foo(/*0*/ s: Sealed): kotlin.Int
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sealed/WithInterface.txt b/compiler/testData/diagnostics/tests/sealed/WithInterface.txt
index 755910f4b4e..62bb5d50b1f 100644
--- a/compiler/testData/diagnostics/tests/sealed/WithInterface.txt
+++ b/compiler/testData/diagnostics/tests/sealed/WithInterface.txt
@@ -9,7 +9,7 @@ public interface Child : Parent {
 }
 
 public sealed class Page : Parent {
-    private constructor Page()
+    internal constructor Page()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -34,3 +34,4 @@ public interface Parent {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/smartCasts/fakeSmartCastOnEquality.txt b/compiler/testData/diagnostics/tests/smartCasts/fakeSmartCastOnEquality.txt
index 898674e8430..37cc7ceaaf3 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/fakeSmartCastOnEquality.txt
+++ b/compiler/testData/diagnostics/tests/smartCasts/fakeSmartCastOnEquality.txt
@@ -65,7 +65,7 @@ public open class OpenClass2 {
 }
 
 public sealed class Sealed {
-    private constructor Sealed()
+    internal constructor Sealed()
     public final fun check(/*0*/ arg: Sealed.Sealed1): kotlin.Unit
     public open override /*1*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -88,3 +88,4 @@ public sealed class Sealed {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/smartCasts/openInSealed.txt b/compiler/testData/diagnostics/tests/smartCasts/openInSealed.txt
index ec78d0d7a29..050f6bbc035 100644
--- a/compiler/testData/diagnostics/tests/smartCasts/openInSealed.txt
+++ b/compiler/testData/diagnostics/tests/smartCasts/openInSealed.txt
@@ -1,9 +1,10 @@
 package
 
 public sealed class My {
-    private constructor My(/*0*/ x: kotlin.Int?)
+    internal constructor My(/*0*/ x: kotlin.Int?)
     public open val x: kotlin.Int?
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.fir.kt b/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.fir.kt
deleted file mode 100644
index 1e1cc9ad267..00000000000
--- a/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.fir.kt
+++ /dev/null
@@ -1,5 +0,0 @@
-// !LANGUAGE: -TopLevelSealedInheritance
-
-sealed class Base
-
-class Derived : Base()
diff --git a/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.kt b/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.kt
deleted file mode 100644
index 6510deffede..00000000000
--- a/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.kt
+++ /dev/null
@@ -1,5 +0,0 @@
-// !LANGUAGE: -TopLevelSealedInheritance
-
-sealed class Base
-
-class Derived : <!SEALED_SUPERTYPE!>Base<!>()
diff --git a/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.txt b/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.txt
deleted file mode 100644
index 6e259fee7a3..00000000000
--- a/compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-package
-
-public sealed class Base {
-    private constructor Base()
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-}
-
-public final class Derived : Base {
-    public constructor Derived()
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-}
diff --git a/compiler/testData/diagnostics/tests/tailRecOnVirtualMember.txt b/compiler/testData/diagnostics/tests/tailRecOnVirtualMember.txt
index 9206c55d728..1860f2bcccb 100644
--- a/compiler/testData/diagnostics/tests/tailRecOnVirtualMember.txt
+++ b/compiler/testData/diagnostics/tests/tailRecOnVirtualMember.txt
@@ -51,7 +51,7 @@ public object D : A {
 }
 
 public sealed class E : A {
-    private constructor E()
+    internal constructor E()
     internal final override /*1*/ tailrec /*fake_override*/ fun baa(/*0*/ y: kotlin.Int): kotlin.Unit
     internal open override /*1*/ tailrec fun bar(/*0*/ y: kotlin.Int): kotlin.Unit
     protected open override /*1*/ tailrec fun baz(/*0*/ y: kotlin.Int): kotlin.Unit
@@ -123,3 +123,4 @@ public final enum class G : kotlin.Enum<G> {
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): G
     public final /*synthesized*/ fun values(): kotlin.Array<G>
 }
+
diff --git a/compiler/testData/diagnostics/tests/tailRecOnVirtualMemberError.txt b/compiler/testData/diagnostics/tests/tailRecOnVirtualMemberError.txt
index 9206c55d728..1860f2bcccb 100644
--- a/compiler/testData/diagnostics/tests/tailRecOnVirtualMemberError.txt
+++ b/compiler/testData/diagnostics/tests/tailRecOnVirtualMemberError.txt
@@ -51,7 +51,7 @@ public object D : A {
 }
 
 public sealed class E : A {
-    private constructor E()
+    internal constructor E()
     internal final override /*1*/ tailrec /*fake_override*/ fun baa(/*0*/ y: kotlin.Int): kotlin.Unit
     internal open override /*1*/ tailrec fun bar(/*0*/ y: kotlin.Int): kotlin.Unit
     protected open override /*1*/ tailrec fun baz(/*0*/ y: kotlin.Int): kotlin.Unit
@@ -123,3 +123,4 @@ public final enum class G : kotlin.Enum<G> {
     public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): G
     public final /*synthesized*/ fun values(): kotlin.Array<G>
 }
+
diff --git a/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.kt b/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.kt
index cafaeda2aa2..e0ea89e6131 100644
--- a/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.kt
+++ b/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.kt
@@ -17,8 +17,8 @@ val test3a = <!ENUM_CLASS_CONSTRUCTOR_CALL!><!INVISIBLE_MEMBER!>EnumClass<!>()<!
 
 sealed class SealedClass
 typealias Test4 = SealedClass
-val test4 = <!SEALED_CLASS_CONSTRUCTOR_CALL!><!INVISIBLE_MEMBER!>Test4<!>()<!>
-val test4a = <!SEALED_CLASS_CONSTRUCTOR_CALL!><!INVISIBLE_MEMBER!>SealedClass<!>()<!>
+val test4 = <!SEALED_CLASS_CONSTRUCTOR_CALL!>Test4()<!>
+val test4a = <!SEALED_CLASS_CONSTRUCTOR_CALL!>SealedClass()<!>
 
 class Outer {
     inner class Inner
diff --git a/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.txt b/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.txt
index 49ad3823820..766cd3606c4 100644
--- a/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.txt
+++ b/compiler/testData/diagnostics/tests/typealias/typeAliasConstructorWrongClass.txt
@@ -66,7 +66,7 @@ public final class Outer {
 }
 
 public sealed class SealedClass {
-    private constructor SealedClass()
+    internal constructor SealedClass()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -76,3 +76,4 @@ public typealias Test2 = AnnotationClass
 public typealias Test3 = EnumClass
 public typealias Test4 = SealedClass
 public typealias Test5 = Outer.Inner
+
diff --git a/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.fir.kt b/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.fir.kt
index 9a4bc272ef9..dd47c0f0768 100644
--- a/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.fir.kt
+++ b/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.fir.kt
@@ -1,4 +1,5 @@
 // !SKIP_JAVAC
+// !API_VERSION: 1.4
 // !LANGUAGE: -InlineClasses
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
diff --git a/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.kt b/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.kt
index fc43d08330e..553616f7713 100644
--- a/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.kt
+++ b/compiler/testData/diagnostics/tests/valueClasses/basicValueClassDeclarationDisabled.kt
@@ -1,4 +1,5 @@
 // !SKIP_JAVAC
+// !API_VERSION: 1.4
 // !LANGUAGE: -InlineClasses
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
@@ -6,11 +7,11 @@ package kotlin.jvm
 
 annotation class JvmInline
 
-<!UNSUPPORTED_FEATURE, VALUE_CLASS_WITHOUT_JVM_INLINE_ANNOTATION!>value<!> class Foo(val x: Int)
+<!VALUE_CLASS_WITHOUT_JVM_INLINE_ANNOTATION!>value<!> class Foo(val x: Int)
 
 <!VALUE_CLASS_WITHOUT_JVM_INLINE_ANNOTATION, WRONG_MODIFIER_TARGET!>value<!> annotation class InlineAnn
 <!VALUE_CLASS_WITHOUT_JVM_INLINE_ANNOTATION, WRONG_MODIFIER_TARGET!>value<!> object InlineObject
 <!VALUE_CLASS_WITHOUT_JVM_INLINE_ANNOTATION, WRONG_MODIFIER_TARGET!>value<!> enum class InlineEnum
 
 @JvmInline
-<!UNSUPPORTED_FEATURE!>value<!> class NotVal(x: Int)
+value class NotVal(<!INLINE_CLASS_CONSTRUCTOR_NOT_FINAL_READ_ONLY_PARAMETER!>x: Int<!>)
diff --git a/compiler/testData/diagnostics/tests/valueClasses/valueClassDeclarationCheck.txt b/compiler/testData/diagnostics/tests/valueClasses/valueClassDeclarationCheck.txt
index 61739d5e67b..432311e420f 100644
--- a/compiler/testData/diagnostics/tests/valueClasses/valueClassDeclarationCheck.txt
+++ b/compiler/testData/diagnostics/tests/valueClasses/valueClassDeclarationCheck.txt
@@ -152,7 +152,7 @@ package kotlin {
         }
 
         public sealed value class D3 {
-            private constructor D3(/*0*/ x: kotlin.Int)
+            internal constructor D3(/*0*/ x: kotlin.Int)
             public final val x: kotlin.Int
             public open override /*1*/ /*synthesized*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
             public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
@@ -177,3 +177,4 @@ package kotlin {
         }
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/when/NonExhaustiveWarningForSealedClass.txt b/compiler/testData/diagnostics/tests/when/NonExhaustiveWarningForSealedClass.txt
index 41884e0fcb4..7a7ce296cff 100644
--- a/compiler/testData/diagnostics/tests/when/NonExhaustiveWarningForSealedClass.txt
+++ b/compiler/testData/diagnostics/tests/when/NonExhaustiveWarningForSealedClass.txt
@@ -26,8 +26,9 @@ public object Last : S {
 }
 
 public sealed class S {
-    private constructor S()
+    internal constructor S()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/when/RedundantElse.txt b/compiler/testData/diagnostics/tests/when/RedundantElse.txt
index 263919657b6..70da44887fa 100644
--- a/compiler/testData/diagnostics/tests/when/RedundantElse.txt
+++ b/compiler/testData/diagnostics/tests/when/RedundantElse.txt
@@ -50,7 +50,7 @@ public final enum class MyEnum : kotlin.Enum<MyEnum!> {
 }
 
 public sealed class X {
-    private constructor X()
+    internal constructor X()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -69,3 +69,4 @@ public sealed class X {
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/testData/diagnostics/tests/when/TopLevelSealed.txt b/compiler/testData/diagnostics/tests/when/TopLevelSealed.txt
index 36836d7ba57..888bd637178 100644
--- a/compiler/testData/diagnostics/tests/when/TopLevelSealed.txt
+++ b/compiler/testData/diagnostics/tests/when/TopLevelSealed.txt
@@ -3,7 +3,7 @@ package
 public fun test(/*0*/ a: A): kotlin.Unit
 
 public sealed class A {
-    private constructor A()
+    internal constructor A()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -29,3 +29,4 @@ public final class D : A {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/tests/when/withSubjectVariable/smartcastToSealed.txt b/compiler/testData/diagnostics/tests/when/withSubjectVariable/smartcastToSealed.txt
index d38333c2d27..deebd0be736 100644
--- a/compiler/testData/diagnostics/tests/when/withSubjectVariable/smartcastToSealed.txt
+++ b/compiler/testData/diagnostics/tests/when/withSubjectVariable/smartcastToSealed.txt
@@ -4,7 +4,7 @@ public fun testSmartcastToSealedInSubjectInitializer1(/*0*/ x: kotlin.Any?): kot
 public fun testSmartcastToSealedInSubjectInitializer2(/*0*/ x: kotlin.Any?): kotlin.Unit
 
 public sealed class Either {
-    private constructor Either()
+    internal constructor Either()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -23,3 +23,4 @@ public final class Right : Either {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/testsWithStdLib/annotations/jvmDefault/allCompatibility/specialization.txt b/compiler/testData/diagnostics/testsWithStdLib/annotations/jvmDefault/allCompatibility/specialization.txt
index 24d71c99ca1..64beffedaa0 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/annotations/jvmDefault/allCompatibility/specialization.txt
+++ b/compiler/testData/diagnostics/testsWithStdLib/annotations/jvmDefault/allCompatibility/specialization.txt
@@ -120,7 +120,7 @@ private final class Outer {
 }
 
 public sealed class SealedSpecialized : Foo<kotlin.String> {
-    private constructor SealedSpecialized()
+    internal constructor SealedSpecialized()
     public open override /*1*/ /*fake_override*/ val kotlin.String.prop: kotlin.String
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
@@ -181,3 +181,4 @@ public open class UnspecializedFromDerived : FooDerived {
     public open override /*1*/ /*fake_override*/ fun test(/*0*/ p: kotlin.String): kotlin.String
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt41644.txt b/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt41644.txt
index 8fc7f0bc599..46c0ad5c342 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt41644.txt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt41644.txt
@@ -3,13 +3,13 @@ package
 public fun </*0*/ A, /*1*/ DA : DataType<A>, /*2*/ B, /*3*/ DB : DataType<B>, /*4*/ C, /*5*/ DC : DataType<C>, /*6*/ D, /*7*/ DD : DataType<D>, /*8*/ E, /*9*/ DE : DataType<E>, /*10*/ F, /*11*/ DF : DataType<F>, /*12*/ G, /*13*/ DG : DataType<G>, /*14*/ H, /*15*/ DH : DataType<H>> either8(/*0*/ firstName: kotlin.String, /*1*/ firstType: DA, /*2*/ secondName: kotlin.String, /*3*/ secondType: DB, /*4*/ thirdName: kotlin.String, /*5*/ thirdType: DC, /*6*/ fourthName: kotlin.String, /*7*/ fourthType: DD, /*8*/ fifthName: kotlin.String, /*9*/ fifthType: DE, /*10*/ sixthName: kotlin.String, /*11*/ sixthType: DF, /*12*/ seventhName: kotlin.String, /*13*/ seventhType: DG, /*14*/ eighthName: kotlin.String, /*15*/ eighthType: DH): DataType.NotNull.Partial<Either8<A, B, C, D, E, F, G, H>>
 
 public sealed class DataType</*0*/ T> {
-    private constructor DataType</*0*/ T>()
+    internal constructor DataType</*0*/ T>()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 
     public sealed class NotNull</*0*/ T> : DataType<T> {
-        private constructor NotNull</*0*/ T>()
+        internal constructor NotNull</*0*/ T>()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
@@ -50,3 +50,4 @@ public final class Tuple8</*0*/ A, /*1*/ DA : DataType<A>, /*2*/ B, /*3*/ DB : D
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
diff --git a/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt42195.txt b/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt42195.txt
index 2655dbd7a0b..f6134461709 100644
--- a/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt42195.txt
+++ b/compiler/testData/diagnostics/testsWithStdLib/inference/performance/kt42195.txt
@@ -3,7 +3,7 @@ package
 public val tree: Tree.Inner<kotlin.Int, kotlin.String, kotlin.Unit, kotlin.Int>
 
 public sealed class Tree</*0*/ TIndex, /*1*/ out TCommon, /*2*/ out TInner, /*3*/ out TLeaf> {
-    private constructor Tree</*0*/ TIndex, /*1*/ out TCommon, /*2*/ out TInner, /*3*/ out TLeaf>()
+    internal constructor Tree</*0*/ TIndex, /*1*/ out TCommon, /*2*/ out TInner, /*3*/ out TLeaf>()
     public abstract val children: kotlin.collections.Map<TIndex, Tree<TIndex, TCommon, TInner, TLeaf>>
     public abstract val value: TCommon
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
@@ -37,3 +37,4 @@ public sealed class Tree</*0*/ TIndex, /*1*/ out TCommon, /*2*/ out TInner, /*3*
         public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
     }
 }
+
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
index 009583ce0f4..f5f0983cb1b 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
@@ -24505,12 +24505,6 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/sealed/NeverFinal.kt");
             }
 
-            @Test
-            @TestMetadata("NeverInterface.kt")
-            public void testNeverInterface() throws Exception {
-                runTest("compiler/testData/diagnostics/tests/sealed/NeverInterface.kt");
-            }
-
             @Test
             @TestMetadata("NeverObject.kt")
             public void testNeverObject() throws Exception {
@@ -27351,12 +27345,6 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.kt");
             }
 
-            @Test
-            @TestMetadata("noTopLevelSealedInheritance.kt")
-            public void testNoTopLevelSealedInheritance() throws Exception {
-                runTest("compiler/testData/diagnostics/tests/sourceCompatibility/noTopLevelSealedInheritance.kt");
-            }
-
             @Nested
             @TestMetadata("compiler/testData/diagnostics/tests/sourceCompatibility/apiVersion")
             @TestDataPath("$PROJECT_ROOT")