Here's what it says now: java.lang.IllegalStateException: @NotNull method com/intellij/openapi/editor/impl/EditorImpl.getDocument must not return null at com.intellij.openapi.editor.impl.EditorImpl.getDocument(EditorImpl.java) at com.intellij.openapi.editor.impl.EditorMarkupModelImpl.<init>(EditorMarkupModelImpl.java:34) at com.intellij.openapi.editor.impl.EditorImpl.<init>(EditorImpl.java:297) at com.intellij.openapi.editor.impl.EditorFactoryImpl.a(EditorFactoryImpl.java:16) at com.intellij.openapi.editor.impl.EditorFactoryImpl.createEditor(EditorFactoryImpl.java:5) at com.intellij.testFramework.TestEditorManagerImpl.openTextEditor(TestEditorManagerImpl.java:75) at com.intellij.testFramework.TestEditorManagerImpl.openFileWithProviders(TestEditorManagerImpl.java:42) at com.intellij.openapi.fileEditor.ex.FileEditorManagerEx.openFile(FileEditorManagerEx.java:2) [[ my code ]] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at com.intellij.testFramework.IdeaTestCase.access$201(IdeaTestCase.java:10) at com.intellij.testFramework.IdeaTestCase$6.run(IdeaTestCase.java:7) at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:402) at com.intellij.testFramework.IdeaTestCase$7.run(IdeaTestCase.java:3) at com.intellij.testFramework.IdeaTestCase.invokeTestRunnable(IdeaTestCase.java:71) at com.intellij.testFramework.IdeaTestCase.runTest(IdeaTestCase.java:202) at com.intellij.testFramework.IdeaTestCase$5.run(IdeaTestCase.java:12) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199) at java.awt.EventQueue.dispatchEvent(EventQueue.java:461) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)