diff --git a/compiler/testData/codegen/box/multiplatform/k2/basic/nonExternalEquals.kt b/compiler/testData/codegen/box/multiplatform/k2/basic/nonExternalEquals.kt
index 46d02f24458..bcdef4f1ce9 100644
--- a/compiler/testData/codegen/box/multiplatform/k2/basic/nonExternalEquals.kt
+++ b/compiler/testData/codegen/box/multiplatform/k2/basic/nonExternalEquals.kt
@@ -21,7 +21,7 @@ actual open class Derived : Base() {
     override fun toString() = "Derived"
 
     // no operator modifier is legal because Base.plus is not expect
-    override fun plus(b: Base) = Derived()
+    override fun plus(b: Base): Base = Derived()
 }
 
 fun box() = "OK"
diff --git a/compiler/testData/codegen/box/multiplatform/k2/defaultArguments/bothInExpectAndActual2.kt b/compiler/testData/codegen/box/multiplatform/k2/defaultArguments/bothInExpectAndActual2.kt
index 30b42191e12..e9eef340dfe 100644
--- a/compiler/testData/codegen/box/multiplatform/k2/defaultArguments/bothInExpectAndActual2.kt
+++ b/compiler/testData/codegen/box/multiplatform/k2/defaultArguments/bothInExpectAndActual2.kt
@@ -19,15 +19,17 @@ actual interface I {
     actual fun test(source: String = "actual")
 }
 
-actual interface J : I {
+actual interface J : I
+
+interface K : J {
     override fun test(source: String) {
         if (source != "actual") throw AssertionError(source)
     }
 }
 
-class K : J
+class L : K
 
 fun box(): String {
-    K().test()
+    L().test()
     return "OK"
 }