diff --git a/tests/test_worker.py b/tests/test_worker.py
index 30e924a..d2668da 100644
--- a/tests/test_worker.py
+++ b/tests/test_worker.py
@@ -96,41 +96,3 @@ class WorkerTests(ChannelTestCase):
         worker.run()
         self.assertEqual(consumer.call_count, 1)
         self.assertEqual(channel_layer.send.call_count, 0)
-
-
-class WorkerGroupTests(ChannelTestCase):
-    """
-    Test threaded workers.
-    """
-
-    def setUp(self):
-        self.channel_layer = channel_layers[DEFAULT_CHANNEL_LAYER]
-        self.worker = WorkerGroup(self.channel_layer, n_threads=4)
-        self.subworkers = self.worker.workers
-
-    def test_subworkers_created(self):
-        self.assertEqual(len(self.subworkers), 3)
-
-    def test_subworkers_no_sigterm(self):
-        for wrk in self.subworkers:
-            self.assertFalse(wrk.signal_handlers)
-
-    def test_ready_signals_sent(self):
-        self.in_signal = 0
-
-        def handle_signal(sender, *args, **kwargs):
-            self.in_signal += 1
-
-        worker_ready.connect(handle_signal)
-        WorkerGroup(self.channel_layer, n_threads=4)
-        self.worker.ready()
-        self.assertEqual(self.in_signal, 4)
-
-    def test_sigterm_handler(self):
-        threads = []
-        for wkr in self.subworkers:
-            t = threading.Thread(target=wkr.run)
-            t.start()
-            threads.append(t)
-        with self.assertRaises(SystemExit):
-            self.worker.sigterm_handler(None, None)