Error: Unable to find class *_FieldSerializer

Hello,

I have some problems executing GWT Tests. I need to store an object (called DatabaseConnection) in my test. I have some input fields consisting of a list box, which is filled with all of these objects, which are currently stored in the database. So I have to store the object first, to test the input fields afterwards.

I have serveral tests, which needs to store a DatabaseConnection. If I execute each of these alone, everything works fine. But when I execute all my GWT test, I get the following error messeage, when I try to save the object:

java.lang.RuntimeException: Unable to find class DatabaseConnection_FieldSerializer

It seems to me, that the error comes before the object is actually stored.

My Test looks this:

public void test() {
    TestHelper.resetDatabaseSync();


    DatabaseConnection dbConnection = new DatabaseConnection();
    TestHelper.storeDatabaseConnection(dbConnection, new AsyncCallback<Long>() {
      @Override
      public void onFailure(Throwable caught) {
        // Here the test fails!
        System.out.println(caught.getMessage());
        fail();
      }
      @Override
      public void onSuccess(Long id) {
      }
    });


    Timer timer = new Timer() {
      @Override
      public void run() {
        // create a input field and do some validataion


        TestHelper.resetDatabaseSync();
        finishTest();
      }
    };


    // Waiting for asynchronous calls to finish.
    timer.schedule(4000);


    delayTestFinish(5000);
  }

My DatabaseConnection implements Serializable and the TestHelper executes methods implemented in a RemoteServiceServlet.

Does anyone know why my test are depending on each other? I am clearing my test database before and after each test.

Thanks for your help!

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