As you have now learned, tests always need to be rerun and reports should always be rechecked.
To validate the repair:
From the Window menu, select Close All
In the Project
Browser tab on the right-hand side of the screen, left-click the
PhoneNumber test node and then
select the Build button.
The test has finished executing when the green execution light on the lower-right of the UI stops flashing. Make sure to wait until it has stopped flashing to ensure all test reports are updated.
From the File menu, select Save Project.
In the Project Browser to the right, right-click the PhoneNumber Java component testing node and select View Report->Test.
One more defect has been eliminated.