diff --git a/compiler/tests-common/org/jetbrains/kotlin/test/testFramework/mock/MockPsiManager.java b/compiler/tests-common/org/jetbrains/kotlin/test/testFramework/mock/MockPsiManager.java
index 8cbba58bda6..bcca0457ab1 100644
--- a/compiler/tests-common/org/jetbrains/kotlin/test/testFramework/mock/MockPsiManager.java
+++ b/compiler/tests-common/org/jetbrains/kotlin/test/testFramework/mock/MockPsiManager.java
@@ -190,4 +190,8 @@ public class MockPsiManager extends PsiManagerEx {
   @Override
   public void beforeChildAddition(@NotNull PsiTreeChangeEventImpl event) {
   }
+
+  @Override
+  public void dropPsiCaches() {
+  }
 }