diff --git a/pyinfra/test/queue_manager_mock.py b/pyinfra/test/queue_manager_mock.py
index ae2fedf..a234dbd 100644
--- a/pyinfra/test/queue_manager_mock.py
+++ b/pyinfra/test/queue_manager_mock.py
@@ -16,17 +16,19 @@ class QueueManagerMock(QueueManager):
     def publish_request(self, request):
         self._input_queue.append(request)
 
-    def publish_response(self, response):
-        self._output_queue.append(response)
+    def publish_response(self, message, callback):
+        self._output_queue.append(callback(message))
 
     def pull_request(self):
-        return self._input_queue.pop()
+        return self._input_queue.popleft()
 
-    def consume(self, callback):
+    def consume(self):
         while self._input_queue:
-            request = self._input_queue.popleft()
-            response = callback(request)
-            self._output_queue.append(response)
+            yield self.pull_request()
+
+    def consume_and_publish(self, callback):
+        for message in self.consume():
+            self.publish_response(message, callback)
 
     def clear(self):
         self._input_queue.clear()
diff --git a/pyinfra/test/unit_tests/consumer_test.py b/pyinfra/test/unit_tests/consumer_test.py
index 6c9d344..547137e 100644
--- a/pyinfra/test/unit_tests/consumer_test.py
+++ b/pyinfra/test/unit_tests/consumer_test.py
@@ -13,7 +13,7 @@ def callback():
 
 @pytest.fixture(scope="session")
 def queue_manager() -> QueueManager:
-    # return QueueManagerMock("input", "output")
+    return QueueManagerMock("input", "output")
     return PikaQueueManager("input", "output")
 
 
@@ -22,10 +22,10 @@ def consumer(queue_manager, callback):
     return Consumer(callback, queue_manager)
 
 
-# def test_consuming_empty_input_queue_does_not_put_anything_on_output_queue(consumer, queue_manager):
-#     queue_manager.clear()
-#     consumer.consume()
-#     assert queue_manager.output_queue.empty()
+def test_consuming_empty_input_queue_does_not_put_anything_on_output_queue(consumer, queue_manager):
+    queue_manager.clear()
+    consumer.consume()
+    assert queue_manager.output_queue.empty()
 
 
 def test_consuming_nonempty_input_queue_puts_messages_on_output_queue_in_fifo_order(consumer, queue_manager, callback):