Fix redis port detection in test_cwe_404

Author: kristjanvalur

tests/test_asyncio/test_cwe_404.py

@@ -13,6 +13,7 @@ def redis_addr(request):
     redis_url = request.config.getoption("--redis-url")
     assert redis_url.startswith("redis://")
     host, port = redis_url[8:].split(":")
+    port = port.split("/")[0]
     return host, int(port)