Index: api/src/test/java/org/apache/logging/log4j/message/LocalizedMessageTest.java
===================================================================
--- api/src/test/java/org/apache/logging/log4j/message/LocalizedMessageTest.java	(Revision 1438905)
+++ api/src/test/java/org/apache/logging/log4j/message/LocalizedMessageTest.java	(Arbeitskopie)
@@ -33,7 +33,7 @@
 
     @Test
     public void testMessageFormat() {
-        final LocalizedMessage msg = new LocalizedMessage("MF", new Locale("en_US"), "msg1", new Object[] {"1", "Test"});
+        final LocalizedMessage msg = new LocalizedMessage("MF", new Locale("en", "US"), "msg1", new Object[] {"1", "Test"});
         final String result = msg.getFormattedMessage();
         final String expected = "This is test number 1 with string argument Test.";
         assertTrue(expected.equals(result));
@@ -42,7 +42,7 @@
 
     @Test
     public void testStringFormat() {
-        final LocalizedMessage msg = new LocalizedMessage("SF", new Locale("en_US"), "msg1", new Object[] {"1", "Test"});
+        final LocalizedMessage msg = new LocalizedMessage("SF", new Locale("en", "US"), "msg1", new Object[] {"1", "Test"});
         final String result = msg.getFormattedMessage();
         final String expected = "This is test number 1 with string argument Test.";
         assertTrue(expected.equals(result));