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diff --git a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
index 10ab67a..d55e658 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
@@ -112,6 +112,7 @@
client = new TestService.TestServiceClient(channel);
var ex = Assert.Throws<RpcException>(() => client.UnaryCall(new SimpleRequest { }));
+ // StatusCode.Unknown as the server-side handler throws an exception after not receiving the authorization header.
Assert.AreEqual(StatusCode.Unknown, ex.Status.StatusCode);
}