diff --git a/j2k/testData/fileOrElement/objectLiteral/MyFrame.java b/j2k/testData/fileOrElement/objectLiteral/MyFrame.java
index 363b0a7d06c..56097f94788 100644
--- a/j2k/testData/fileOrElement/objectLiteral/MyFrame.java
+++ b/j2k/testData/fileOrElement/objectLiteral/MyFrame.java
@@ -8,7 +8,9 @@ interface WindowListener {
 interface EmptyWindowListener {
 }
 
-open class EmptyWindowAdapter : EmptyWindowListener {}
+class EmptyWindowAdapter implements EmptyWindowListener {
+
+}
 
 class WindowAdapter implements WindowListener {
   public void windowClosing () {
diff --git a/j2k/testData/fileOrElement/objectLiteral/MyFrame.kt b/j2k/testData/fileOrElement/objectLiteral/MyFrame.kt
index 31b3ddc7024..7d717216c58 100644
--- a/j2k/testData/fileOrElement/objectLiteral/MyFrame.kt
+++ b/j2k/testData/fileOrElement/objectLiteral/MyFrame.kt
@@ -5,7 +5,8 @@ internal interface WindowListener {
 }
 
 internal interface EmptyWindowListener
-internal open class EmptyWindowAdapter
+
+internal open class EmptyWindowAdapter : EmptyWindowListener
 
 internal open class WindowAdapter : WindowListener {
     override fun windowClosing() {}