diff --git a/oauth2_http/javatests/com/google/auth/oauth2/MockMetadataServerTransport.java b/oauth2_http/javatests/com/google/auth/oauth2/MockMetadataServerTransport.java
index de80c1537..9f68220a9 100644
--- a/oauth2_http/javatests/com/google/auth/oauth2/MockMetadataServerTransport.java
+++ b/oauth2_http/javatests/com/google/auth/oauth2/MockMetadataServerTransport.java
@@ -334,8 +334,7 @@ protected boolean isIdentityDocumentUrl(String url) {
 
   protected boolean isMtlsConfigRequestUrl(String url) {
     return url.equals(
-        String.format(
-            ComputeEngineCredentials.getMetadataServerUrl()
-                + SecureSessionAgent.S2A_CONFIG_ENDPOINT_POSTFIX));
+        ComputeEngineCredentials.getMetadataServerUrl()
+            + SecureSessionAgent.S2A_CONFIG_ENDPOINT_POSTFIX);
   }
 }