diff --git a/Google.Api.Gax.Grpc.Tests/ClientBuilderBaseTest.EffectiveEndpointTest.cs b/Google.Api.Gax.Grpc.Tests/ClientBuilderBaseTest.EffectiveEndpointTest.cs
index e69f2a15..4c57f738 100644
--- a/Google.Api.Gax.Grpc.Tests/ClientBuilderBaseTest.EffectiveEndpointTest.cs
+++ b/Google.Api.Gax.Grpc.Tests/ClientBuilderBaseTest.EffectiveEndpointTest.cs
@@ -28,7 +28,6 @@ public class EffectiveEndpointTest
                 // Default endpoint, universe domain, expected effective endpoint
                 { DefaultEndpointAtDefaultDomain, null, DefaultEndpointAtDefaultDomain},
                 { DefaultEndpointAtDefaultDomain, DefaultUniverseDomain, DefaultEndpointAtDefaultDomain},
-                { DefaultEndpointAtDefaultDomain, DefaultUniverseDomain, DefaultEndpointAtDefaultDomain},
                 { DefaultEndpointAtDefaultDomain, CustomUniverseDomain, EffectiveEndpointAtCustomUniverseDomain},
                 { DefaultEndpointNotAtDefaultDomain, null, DefaultEndpointNotAtDefaultDomain},
                 { DefaultEndpointNotAtDefaultDomain, DefaultUniverseDomain, DefaultEndpointNotAtDefaultDomain},