src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.test/src/org/graalvm/compiler/hotspot/test/LoadJavaMirrorWithKlassTest.java

@@ -53,10 +53,15 @@
 
         @Override
         public int hashCode() {
             return clazz.hashCode();
         }
+
+        @Override
+        public String toString() {
+            return "Wrapper-" + clazz;
+        }
     }
 
     @Override
     @SuppressWarnings("try")
     protected Suites createSuites(OptionValues options) {