diff --git a/tests/server.py b/tests/server.py
index 122f9870f..06e344653 100644
--- a/tests/server.py
+++ b/tests/server.py
@@ -70,6 +70,7 @@ def value(self) -> T:
 
 
 class TestServerRequest(http.Request):
+    __test__ = False
     channel: "TestServerHTTPChannel"
     post_body: Optional[bytes] = None