Thanks for looking into this. A couple of questions/comments before I give the LGTM..
http://gwt-code-reviews.appspot.com/1224801/diff/1/2 File user/src/com/google/gwt/junit/client/GWTTestCase.java (right): http://gwt-code-reviews.appspot.com/1224801/diff/1/2#newcode445 user/src/com/google/gwt/junit/client/GWTTestCase.java:445: // Check to see if gwt.devjar is null. If so, notify the Is this system property required? http://gwt-code-reviews.appspot.com/1224801/diff/1/2#newcode448 user/src/com/google/gwt/junit/client/GWTTestCase.java:448: testResult.addError(this, new Throwable("No GWT devjar property found. Did you mean to run as a GWT JUnit Test instead of a JUnit Test?")); Suggestion: "No GWT devjar property found. Did you mean to run as a GWT JUnit Test instead of a JUnit Test?" --> "The gwt.devjar property has not been set. If you are using the Google Plugin for Eclipse, you should be running this test as a 'GWT JUnit Test', not a plain 'JUnit Test'." http://gwt-code-reviews.appspot.com/1224801/show -- http://groups.google.com/group/Google-Web-Toolkit-Contributors