Enable addtional flake8-bugbear linting checks. (#9659)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/server.py b/tests/server.py

index 2287d20076..57cc4ac605 100644
--- a/tests/server.py
+++ b/tests/server.py
@@ -593,7 +593,7 @@ class FakeTransport:
         if self.disconnected:
             return
 
-        if getattr(self.other, "transport") is None:
+        if not hasattr(self.other, "transport"):
             # the other has no transport yet; reschedule
             if self.autoflush:
                 self._reactor.callLater(0.0, self.flush)