gistfile1.py

@app.teardown_request
def shutdown_request(exc=None):
  if exc is not None:
    print "An exception happened!"

def test_request_teardown(self):
        try:
            with self.app.test_request_context():
                raise Exception('dummy exception')
        except:
            pass
        
        # as expected, "An exception happened!" is printed
        
        # uncomment this to resolve the issue
        # import sys; sys.exc_clear()

        # now test with object updates instead of creation
        with self.app.test_request_context():
          # do stuff that doesn't throw an exception
        
        # here "An exception happened!" would be printed