diff --git a/binding/src/test/java/org/jsonx/RangeTest.java b/binding/src/test/java/org/jsonx/RangeTest.java
index d1c460f..bf53fbc 100644
--- a/binding/src/test/java/org/jsonx/RangeTest.java
+++ b/binding/src/test/java/org/jsonx/RangeTest.java
@@ -60,7 +60,7 @@ public void test() throws ParseException {
       fail("Expected IllegalArgumentException");
     }
     catch (final IllegalArgumentException e) {
-      assertEquals("scale must be positive", e.getMessage());
+      assertEquals("scale (-1) must be positive", e.getMessage());
     }
 
     try {