--- a/testing/mozbase/mozprocess/mozprocess/processhandler.py
+++ b/testing/mozbase/mozprocess/mozprocess/processhandler.py
@@ -358,16 +358,17 @@ falling back to not using job objects fo
                             self._process_events.put({self.pid: 'FINISHED'})
 
                     if not portstatus:
                         # Check to see what happened
                         errcode = winprocess.GetLastError()
                         if errcode == winprocess.ERROR_ABANDONED_WAIT_0:
                             # Then something has killed the port, break the loop
                             print >> sys.stderr, "IO Completion Port unexpectedly closed"
+                            self._process_events.put({self.pid: 'FINISHED'})
                             break
                         elif errcode == winprocess.WAIT_TIMEOUT:
                             # Timeouts are expected, just keep on polling
                             continue
                         else:
                             print >> sys.stderr, "Error Code %s trying to query IO Completion Port, exiting" % errcode
                             raise WinError(errcode)
                             break