diff --git a/test/IdentityServer.UnitTests/ResponseHandling/UserInfoResponseGeneratorTests.cs b/test/IdentityServer.UnitTests/ResponseHandling/UserInfoResponseGeneratorTests.cs
index 43268b45c..1d575c7dd 100644
--- a/test/IdentityServer.UnitTests/ResponseHandling/UserInfoResponseGeneratorTests.cs
+++ b/test/IdentityServer.UnitTests/ResponseHandling/UserInfoResponseGeneratorTests.cs
@@ -119,7 +119,7 @@ public async Task ProcessAsync_should_return_claims_issued_by_profile_service()
         {
             street_address = "One Hacker Way",
             locality = "Heidelberg",
-            postal_code = "69118",
+            postal_code = 69118,
             country = "Germany"
         };