Raise exceptions on all warnings and errors in tests

tests/conftest.py

@@ -59,7 +59,7 @@ def event_loop(request):
   loop = asyncio.get_event_loop()
   yield loop
 
-@pytest.fixture(scope="module")
+@pytest.fixture(scope="session", autouse=True)
 def raise_on_logger_msg():
   def proc(logger, method_name, event_dict):
     if method_name in ('warn', 'error'):

tests/test_regex.py

@@ -19,7 +19,7 @@ async def test_regex(get_version):
         "regex": 'for (\w+) examples',
     }) == "illustrative"
 
-async def test_missing_ok(get_version, raise_on_logger_msg):
+async def test_missing_ok(get_version):
     assert await get_version("example", {
         "url": "http://example.net/",
         "regex": "foobar",