diff --git a/java/java-tests/testSrc/com/intellij/index/StringIndex.java b/java/java-tests/testSrc/com/intellij/index/StringIndex.java
index 851a389679b8..b381d9afcd37 100644
--- a/java/java-tests/testSrc/com/intellij/index/StringIndex.java
+++ b/java/java-tests/testSrc/com/intellij/index/StringIndex.java
@@ -48,14 +48,14 @@ public class StringIndex {
   }
   
   public void update(final String path, @Nullable String content, @Nullable String oldContent) throws StorageException {
-    myIndex.update(path.hashCode(), toInput(path, content)).compute();
+    myIndex.update(Math.abs(path.hashCode()), toInput(path, content)).compute();
   }
 
   public void dispose() {
     myIndex.dispose();
   }
-  
-  @Nullable 
+
+  @Nullable
   private PathContentPair toInput(@NotNull String path, @Nullable String content) {
     return content != null ? new PathContentPair(path, content) : null;
   }