diff --git a/idea/tests/org/jetbrains/jet/plugin/libraries/AbstractLibrariesTest.java b/idea/tests/org/jetbrains/jet/plugin/libraries/AbstractLibrariesTest.java
index b63385e8d29..700102d6f39 100644
--- a/idea/tests/org/jetbrains/jet/plugin/libraries/AbstractLibrariesTest.java
+++ b/idea/tests/org/jetbrains/jet/plugin/libraries/AbstractLibrariesTest.java
@@ -37,6 +37,8 @@ public abstract class AbstractLibrariesTest extends PlatformTestCase {
     protected static final String TEST_DATA_PATH = PluginTestCaseBase.getTestDataPathBase() + "/libraries";
     protected VirtualFile myLibraryDir;
 
+    protected abstract boolean isWithSources();
+
     @Override
     protected void setUp() throws Exception {
         super.setUp();
@@ -53,6 +55,11 @@ public abstract class AbstractLibrariesTest extends PlatformTestCase {
 
                 Library.ModifiableModel libraryModel = moduleModel.getModuleLibraryTable().getModifiableModel().createLibrary("myKotlinLib").getModifiableModel();
                 libraryModel.addRoot(myLibraryDir, OrderRootType.CLASSES);
+                if (isWithSources()) {
+                    VirtualFile sourceDir = LocalFileSystem.getInstance().findFileByPath(TEST_DATA_PATH + "/library");
+                    assert sourceDir != null;
+                    libraryModel.addRoot(sourceDir, OrderRootType.SOURCES);
+                }
                 libraryModel.commit();
 
                 moduleModel.commit();
diff --git a/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithoutSourcesTest.java b/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithoutSourcesTest.java
index 095d9ceca0e..c830d784064 100644
--- a/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithoutSourcesTest.java
+++ b/idea/tests/org/jetbrains/jet/plugin/libraries/LibrariesWithoutSourcesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2012 JetBrains s.r.o.
+ * Copyright 2010-2012 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -131,4 +131,9 @@ public class LibrariesWithoutSourcesTest extends AbstractLibrariesTest {
         assertNotNull(classFile);
         return classFile;
     }
+
+    @Override
+    protected boolean isWithSources() {
+        return false;
+    }
 }
\ No newline at end of file