diff --git a/src/Security/Authentication/test/CertificateTests.cs b/src/Security/Authentication/test/CertificateTests.cs
index e924fabe5de2..789487179255 100644
--- a/src/Security/Authentication/test/CertificateTests.cs
+++ b/src/Security/Authentication/test/CertificateTests.cs
@@ -306,7 +306,7 @@ public async Task VerifyClientCertWithUntrustedRootAndTrustedChainEndsUpInForbid
             Assert.Equal(HttpStatusCode.Forbidden, response.StatusCode);
         }
 
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/aspnetcore/issues/39669")]
         public async Task VerifyValidClientCertWithTrustedChainAuthenticates()
         {
             using var host = await CreateHost(