Right click on the test failure that has currently been created in the Problems View. You'll see some standard options, including "Go To", "Copy", and "Properties", as well as four options specific to continuous testing:
Try selecting Rerun now. Notice that the "T" icon at the left of the Problems View briefly changes from red () to gray (), then back to red. If it's too quick to see, add the following line to the beginning of getTopN:
Thread.sleep(1000);
The gray means that continuous testing is currently planning to rerun the indicated test, and doesn't yet know the result. If the rerun test fails, the icon is switched back to red. If the rerun test passes, the problem is deleted.