diff --git a/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2ConnectionTests.cs b/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2ConnectionTests.cs
index e79ca27d5059..76ca17069097 100644
--- a/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2ConnectionTests.cs
+++ b/src/Servers/Kestrel/test/InMemory.FunctionalTests/Http2/Http2ConnectionTests.cs
@@ -5921,6 +5921,7 @@ await WaitForConnectionErrorAsync<Http2ConnectionErrorException>(
     }
 
     [Theory]
+    [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/66309")]
     [InlineData((int)(Http2FrameType.DATA))]
     [InlineData((int)(Http2FrameType.HEADERS))]
     public async Task AbortedStream_ResetsAndDrainsRequest_RefusesFramesAfterClientReset(int intFinalFrameType)