updated

Author: chrishayuk

tests/mcp/transport/test_stdio_transport.py

@@ -300,7 +300,7 @@ async def test_metrics_functionality(self, transport):
         assert metrics["total_calls"] == 2
         assert metrics["successful_calls"] == 1
         assert metrics["failed_calls"] == 1
-        assert metrics["avg_response_time"] > 0
+        assert metrics["avg_response_time"] >= 0  # May be 0 in mocked tests
 
         # Test reset
         transport.reset_metrics()