Add flake8-bugbear

setup.py

@@ -15,6 +15,7 @@ extras_require = {
         "black==19.3b0",
         "isort==4.3.21",
         "flake8>=3.7.7,<4.0.0",
+        "flake8-bugbear",
     ],
     "dev": ["tox>=3.13.2,<4.0.0", "docformatter"],
 }

tests_interop/daemon.py

@@ -32,7 +32,9 @@ async def try_until_success(coro_func, timeout=TIMEOUT_DURATION):
             break
         if (time.monotonic() - t_start) >= timeout:
             # timeout
-            assert False, f"{coro_func} is still failing after `{timeout}` seconds"
+            raise AssertionError(
+                f"{coro_func} is still failing after `{timeout}` seconds"
+            )
         await asyncio.sleep(0.01)