test/java/time/tck/java/time/MockSimplePeriod.java

@@ -174,9 +174,9 @@
         return unit.hashCode() ^ (int) (amount ^ (amount >>> 32));
     }
 
     @Override
     public String toString() {
-        return amount + " " + unit.getName();
+        return amount + " " + unit;
     }
 
 }