diff --git a/src/chweb/consumer.py b/src/chweb/consumer.py
index cb18681..7da5bdb 100644
--- a/src/chweb/consumer.py
+++ b/src/chweb/consumer.py
@@ -19,6 +19,7 @@ class Consumer(Service):
     they can be serialized in a :class:`chweb.models.Check` object, then they
     are saved in the database.
     """
+
     def __init__(self, config: Config,
                  logger: logging.Logger,
                  event_loop: asyncio.AbstractEventLoop,
@@ -110,14 +111,14 @@ class Db:
         """
         if self.conn is not None:
             try:
-                await self.conn.execute('''
-                    INSERT INTO statuses (domain, regex, regex_matches,
+                await self.conn.execute(
+                    '''INSERT INTO statuses (domain, regex, regex_matches,
                                           request_time, response_time,
                                           status, url)
-                    VALUES($1, $2, $3, $4, $5, $6, $7)
-                    ''', data.domain, data.regex, data.regex_matches,
-                         data.request_time, data.response_time, data.status,
-                         data.url)
+                    VALUES($1, $2, $3, $4, $5, $6, $7)''',
+                    data.domain, data.regex, data.regex_matches,
+                    data.request_time, data.response_time, data.status,
+                    data.url)
             except asyncpg.PostgresError as exc:
                 self.logger.error("error in query %s", exc)
                 raise
diff --git a/tests/conftest.py b/tests/conftest.py
index 5ddc26e..848a0b6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,7 @@
 import asyncio
 import pytest
 from chweb.cmd import create_config
+from chweb.models import Check
 
 @pytest.fixture()
 def config():
@@ -47,3 +48,12 @@ def config_invalid():
       ]
     }
     return create_config(config_dict)
+
+@pytest.fixture
+def check():
+    return Check(
+        domain="example.com",
+        response_time=3265,
+        status=200,
+        url="https://example.com",
+    )
diff --git a/tests/test_consumer.py b/tests/test_consumer.py
new file mode 100644
index 0000000..ed2f3d8
--- /dev/null
+++ b/tests/test_consumer.py
@@ -0,0 +1,21 @@
+import asyncio
+
+import aiokafka
+from mock import Mock, AsyncMock
+import pytest
+
+from chweb.consumer import Consumer
+
+
+@pytest.mark.asyncio
+async def test_consumer_called(check, config, event_loop):
+    consumer = Consumer(config, Mock(), event_loop, Mock())
+
+    consumer.consumer = AsyncMock()
+    consumer.db = AsyncMock()
+
+    task = event_loop.create_task(consumer())
+    await asyncio.sleep(0)
+    consumer.db.setup.assert_called()
+    consumer.consumer.start.assert_called()
+    task.cancel()
diff --git a/tests/test_producer.py b/tests/test_producer.py
index e71f585..8150b99 100644
--- a/tests/test_producer.py
+++ b/tests/test_producer.py
@@ -1,25 +1,19 @@
 import asyncio
 
 import aiokafka
-from mock import Mock
+from mock import Mock, AsyncMock
 import pytest
 
 from chweb.collector import Producer
-from chweb.models import Check
 
 
 @pytest.mark.asyncio
-async def test_producer_called(config, event_loop):
+async def test_producer_called(check, config, event_loop):
     queue = asyncio.Queue()
     producer = Producer(config, Mock(), event_loop, queue)
-    check = Check()
     await queue.put(check)
 
-    async def async_patch():
-        pass
-    Mock.__await__ = lambda x: async_patch().__await__()
-
-    producer.producer = Mock()
+    producer.producer = AsyncMock()
 
     task = event_loop.create_task(producer())
     await asyncio.sleep(0)
@@ -32,14 +26,9 @@ async def test_producer_called(config, event_loop):
 async def test_producer_called_invalid(config, event_loop):
     queue = asyncio.Queue()
     producer = Producer(config, Mock(), event_loop, queue)
-    check = Check()
     await queue.put('')
 
-    async def async_patch():
-        pass
-    Mock.__await__ = lambda x: async_patch().__await__()
-
-    producer.producer = Mock()
+    producer.producer = AsyncMock()
 
     task = event_loop.create_task(producer())
     await asyncio.sleep(0)