diff --git a/tests/tools/fixtures_aioquic.py b/tests/tools/fixtures_aioquic.py
index f8ed83e4..34f56032 100644
--- a/tests/tools/fixtures_aioquic.py
+++ b/tests/tools/fixtures_aioquic.py
@@ -26,6 +26,7 @@ async def pipe_factory_quic(generate_test_certificates,
     )
 
     server: Optional[RSocketBase] = None
+    client: Optional[RSocketBase] = None
     wait_for_server = Event()
 
     def store_server(new_server):
diff --git a/tests/tools/fixtures_http3.py b/tests/tools/fixtures_http3.py
index fb3308db..91c005f6 100644
--- a/tests/tools/fixtures_http3.py
+++ b/tests/tools/fixtures_http3.py
@@ -19,6 +19,7 @@ async def pipe_factory_http3(generate_test_certificates,
     certificate, private_key = generate_test_certificates
 
     server: Optional[RSocketBase] = None
+    client: Optional[RSocketBase] = None
     wait_for_server = Event()
 
     def store_server(new_server):
@@ -43,7 +44,9 @@ def store_server(new_server):
                 await wait_for_server.wait()
                 yield server, client
     finally:
-        await server.close()
+        if server is not None:
+            await server.close()
+
         assert_no_open_streams(client, server)
 
         http3_server.close()