human
Solve the following python programming problem given the following code:
def build_UNIX_integration_tests(mixin_class, name, fixture) : 
    '
    Build ``AsyncTestCase`` class that runs the tests in the mixin class with
    real queries over a UNIX socket.

    :param mixin_class: A mixin class for ``AsyncTestCase`` that relies on
        having a ``self.scenario``.

    :param name: A ``str``, the name of the test category.

    :param fixture: A callable that takes a ``AsyncTestCase`` and returns a
        ``klein.Klein`` object.

    :return: A L``AsyncTestCase`` class.
    ' 
    class RealTests (mixin_class, AsyncTestCase) : 
        '
        Tests that endpoints are available over the network interfaces that
        real API users will be connecting from.
        ' 
        def setUp(self) : 
            path = os.path.relpath (self.mktemp ()) 
            self.app = fixture (self) 
            self.port = reactor.listenUNIX (path, Site (self.app.resource ())) 
            self.addCleanup (self.port.stopListening) 
            self.agent = ProxyAgent (UNIXClientEndpoint (reactor, path), reactor) 
            super (RealTests, self).setUp () 
RealTests.__name__ += fixture 
    RealTests.__module__ = mixin_class.__module__ 
    return RealTests 

    
    

    Fix the buggy line: RealTests.__name__ += fixture
assistant
#Here is Python code to fix the buggy line: RealTests.

RealTests.__name__ += name