diff --git a/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/impl/VfsRootAccess.java b/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/impl/VfsRootAccess.java
index b6fa97092059..5a0f433c7828 100644
--- a/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/impl/VfsRootAccess.java
+++ b/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/impl/VfsRootAccess.java
@@ -49,7 +49,7 @@ import java.util.Set;
 public class VfsRootAccess {
   private static final boolean SHOULD_PERFORM_ACCESS_CHECK = System.getenv("NO_FS_ROOTS_ACCESS_CHECK") == null;
   // we don't want test subclasses to accidentally remove allowed files, added by base classes
-  private static final Set<String> ourAdditionalRoots = new THashSet<String>();
+  private static final Set<String> ourAdditionalRoots = new THashSet<String>(FileUtil.PATH_HASHING_STRATEGY);
   private static boolean insideGettingRoots;
 
   @TestOnly
@@ -109,7 +109,7 @@ public class VfsRootAccess {
     Project[] openProjects = ProjectManager.getInstance().getOpenProjects();
     if (openProjects.length == 0) return null;
 
-    final Set<String> allowed = new THashSet<String>();
+    final Set<String> allowed = new THashSet<String>(FileUtil.PATH_HASHING_STRATEGY);
     allowed.add(FileUtil.toSystemIndependentName(PathManager.getHomePath()));
 
     try {
diff --git a/platform/testFramework/src/com/intellij/testFramework/fixtures/impl/CodeInsightTestFixtureImpl.java b/platform/testFramework/src/com/intellij/testFramework/fixtures/impl/CodeInsightTestFixtureImpl.java
index 8aafb17da1de..8289050e183b 100644
--- a/platform/testFramework/src/com/intellij/testFramework/fixtures/impl/CodeInsightTestFixtureImpl.java
+++ b/platform/testFramework/src/com/intellij/testFramework/fixtures/impl/CodeInsightTestFixtureImpl.java
@@ -185,7 +185,7 @@ public class CodeInsightTestFixtureImpl extends BaseFixture implements CodeInsig
     }
 
     VirtualFile result;
-    final String path = fromFile.getPath();
+    final String path = fromFile.getAbsolutePath();
     if (myTempDirFixture instanceof LightTempDirTestFixtureImpl) {
       VfsRootAccess.allowRootAccess(path);
       Disposer.register(myTestRootDisposable, new Disposable() {