diff --git a/platform/testFramework/src/com/intellij/testFramework/InspectionTestUtil.java b/platform/testFramework/src/com/intellij/testFramework/InspectionTestUtil.java
index e10d9c2f2015..3b089204dd14 100644
--- a/platform/testFramework/src/com/intellij/testFramework/InspectionTestUtil.java
+++ b/platform/testFramework/src/com/intellij/testFramework/InspectionTestUtil.java
@@ -66,7 +66,10 @@ public final class InspectionTestUtil {
     }
 
     if (!problems.isEmpty()) {
-      Assert.fail(String.join("\n", problems));
+      Assert.fail(String.join("\n", problems) +
+                  "\n where all reported are: " + JDOMUtil.writeElement(doc) +
+                  "\n all expected are: " + JDOMUtil.writeElement(expectedDoc)
+      );
     }
   }