diff --git a/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithSourcesTest.java b/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithSourcesTest.java
index 0fa8238db4d..2faf46854fd 100644
--- a/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithSourcesTest.java
+++ b/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithSourcesTest.java
@@ -126,6 +126,10 @@ public class LibrariesWithSourcesTest extends AbstractLibrariesTest {
             filesToNumbersAndOffsets.putValue(navigationElement.getContainingFile(), numberAndOffset);
         }
 
+        if (filesToNumbersAndOffsets.isEmpty()) {
+            return "<no references>";
+        }
+
         List<PsiFile> files = new ArrayList<PsiFile>(filesToNumbersAndOffsets.keySet());
         Collections.sort(files, new Comparator<PsiFile>() {
             @Override