diff --git a/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.fir.kt b/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.fir.kt
new file mode 100644
index 00000000000..0224f2100f1
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.fir.kt
@@ -0,0 +1,24 @@
+<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> fun foo1()
+<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> val bar1 = <!EXPECTED_PROPERTY_INITIALIZER!>42<!>
+<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> class ImplicitExpect {
+    fun foo()
+    val x: Int
+    class Inner
+}
+
+<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> class ExplicitExpect {
+    <!NOT_A_MULTIPLATFORM_COMPILATION, WRONG_MODIFIER_TARGET!>expect<!> fun explicitFoo()
+    <!NOT_A_MULTIPLATFORM_COMPILATION, NOT_A_MULTIPLATFORM_COMPILATION, NOT_A_MULTIPLATFORM_COMPILATION, WRONG_MODIFIER_TARGET!>expect<!> val explicitX: Int
+    <!NOT_A_MULTIPLATFORM_COMPILATION, WRONG_MODIFIER_TARGET!>expect<!> class ExplicitInner
+}
+
+<!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> fun foo2() = 42
+<!MUST_BE_INITIALIZED!><!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> val bar2: Int<!>
+<!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> interface Baz2
+
+<!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> class ImplicitExpect {
+    <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> fun foo() {
+    }
+    <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> val x: Int = 0
+    <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> class Inner
+}
\ No newline at end of file
diff --git a/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.kt b/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.kt
index 4bc6de41916..71a809f3a3e 100644
--- a/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.kt
+++ b/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.kt
@@ -1,17 +1,24 @@
-// FIR_IDENTICAL
 <!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> fun foo1()
 <!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> val bar1 = <!EXPECTED_PROPERTY_INITIALIZER!>42<!>
-<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> class Baz1 {
+<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> class ImplicitExpect {
     fun foo()
+    val x: Int
+    class Inner
+}
 
-    class Baz12
+<!NOT_A_MULTIPLATFORM_COMPILATION!>expect<!> class ExplicitExpect {
+    <!WRONG_MODIFIER_TARGET!>expect<!> fun explicitFoo()
+    <!WRONG_MODIFIER_TARGET!>expect<!> val explicitX: Int
+    <!NOT_A_MULTIPLATFORM_COMPILATION, WRONG_MODIFIER_TARGET!>expect<!> class ExplicitInner
 }
 
 <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> fun foo2() = 42
 <!MUST_BE_INITIALIZED!><!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> val bar2: Int<!>
 <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> interface Baz2
 
-<!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> class Baz1 {
+<!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> class ImplicitExpect {
     <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> fun foo() {
     }
-}
+    <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> val x: Int = 0
+    <!NOT_A_MULTIPLATFORM_COMPILATION!>actual<!> class Inner
+}
\ No newline at end of file
diff --git a/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.txt b/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.txt
index 876e1b4bbf3..34aa61a2a13 100644
--- a/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.txt
+++ b/compiler/testData/diagnostics/tests/sourceCompatibility/noMultiplatformProjects.txt
@@ -3,16 +3,24 @@ package
 public actual val bar2: kotlin.Int
 public actual fun foo2(): kotlin.Int
 
-public final actual class Baz1 {
-    public constructor Baz1()
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public final actual fun foo(): kotlin.Unit
-    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-}
-
 public actual interface Baz2 {
     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 actual class ImplicitExpect {
+    public constructor ImplicitExpect()
+    public actual final val x: kotlin.Int = 0
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final actual fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public final actual class Inner {
+        public 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
+    }
+}