Update PatternOptionBuilderTest.java

really exist file name?
diff --git a/src/test/java/org/apache/commons/cli/PatternOptionBuilderTest.java b/src/test/java/org/apache/commons/cli/PatternOptionBuilderTest.java
index b7c1fb3..0ee56a1 100644
--- a/src/test/java/org/apache/commons/cli/PatternOptionBuilderTest.java
+++ b/src/test/java/org/apache/commons/cli/PatternOptionBuilderTest.java
@@ -163,7 +163,7 @@
     {
         Options options = PatternOptionBuilder.parsePattern("f<g<");
         CommandLineParser parser = new PosixParser();
-        CommandLine line = parser.parse(options, new String[] { "-f", "test.properties", "-g", "build.xml" });
+        CommandLine line = parser.parse(options, new String[] { "-f", "test.properties", "-g", "/dev/null" });
         
         assertNotNull("option g not parsed, or not FileInputStream", (FileInputStream) line.getOptionObject("g"));
         assertNull("option f parsed", (FileInputStream) line.getOptionObject("f"));