diff --git a/src/libraries/Common/tests/System/Net/Http/Http2LoopbackConnection.cs b/src/libraries/Common/tests/System/Net/Http/Http2LoopbackConnection.cs
index 18edaca7a6524f..84bb65b63aac47 100644
--- a/src/libraries/Common/tests/System/Net/Http/Http2LoopbackConnection.cs
+++ b/src/libraries/Common/tests/System/Net/Http/Http2LoopbackConnection.cs
@@ -976,6 +976,8 @@ public override async Task WaitForCancellationAsync(bool ignoreIncomingData = tr
             } while (frame.Type != FrameType.RstStream);
 
             Assert.Equal(streamId, frame.StreamId);
+            RstStreamFrame rstStreamFrame = Assert.IsType<RstStreamFrame>(frame);
+            Assert.Equal((int)ProtocolErrors.CANCEL, rstStreamFrame.ErrorCode);
         }
     }
 }