diff --git a/platform/platform-impl/src/com/intellij/idea/IdeaTestApplication.java b/platform/platform-impl/src/com/intellij/idea/IdeaTestApplication.java
index bcbf41cbd1da..bab5a000ec17 100644
--- a/platform/platform-impl/src/com/intellij/idea/IdeaTestApplication.java
+++ b/platform/platform-impl/src/com/intellij/idea/IdeaTestApplication.java
@@ -18,14 +18,18 @@ package com.intellij.idea;
 import com.intellij.ide.plugins.IdeaPluginDescriptor;
 import com.intellij.ide.plugins.PluginManager;
 import com.intellij.openapi.actionSystem.DataProvider;
+import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.application.Result;
 import com.intellij.openapi.application.WriteAction;
 import com.intellij.openapi.application.ex.ApplicationEx;
 import com.intellij.openapi.application.ex.ApplicationManagerEx;
 import com.intellij.openapi.application.impl.PluginsFacade;
 import com.intellij.openapi.extensions.PluginId;
+import com.intellij.openapi.util.io.FileUtil;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.File;
+
 public class IdeaTestApplication extends CommandLineApplication {
   private DataProvider myDataContext;
 
@@ -41,6 +45,10 @@ public class IdeaTestApplication extends CommandLineApplication {
         return PluginManager.getPlugins();
       }
     };
+
+    final File system = new File(PathManager.getSystemPath());
+    FileUtil.delete(system);
+    system.mkdirs();
   }
 
   public void setDataProvider(DataProvider dataContext) {