Index: /trunk/test/unit/org/openstreetmap/josm/data/validation/tests/OpeningHourTestTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/data/validation/tests/OpeningHourTestTest.java	(revision 11889)
+++ /trunk/test/unit/org/openstreetmap/josm/data/validation/tests/OpeningHourTestTest.java	(revision 11890)
@@ -72,4 +72,7 @@
     }
 
+    /**
+     * Test translated messages.
+     */
     @Test
     public void testI18n() {
@@ -118,5 +121,6 @@
         assertThat(openingHourTest.checkOpeningHourSyntax(null, null), isEmpty());
         assertThat(openingHourTest.checkOpeningHourSyntax(null, ""), isEmpty());
-        assertThat(openingHourTest.checkOpeningHourSyntax(null, " "), isEmpty());
+        assertEquals("null - The value contains nothing meaningful which can be parsed.",
+                openingHourTest.checkOpeningHourSyntax(null, " ").get(0).getMessage());
     }