diff --git a/test/Gruntfile.js b/test/Gruntfile.js
index 7180d52..a98d190 100644
--- a/test/Gruntfile.js
+++ b/test/Gruntfile.js
@@ -16,6 +16,11 @@ module.exports = function(grunt) {
       , replacement: function(match) { return match.toLowerCase(); }
       , path: 'test.txt'
       }
+    , test4: {
+        pattern: /Y/g
+      , replacement: 'Z'
+      , path: 'test.txt'
+      }
     }
   });
 
diff --git a/test/test.js b/test/test.js
index a958ffd..b5cfd94 100644
--- a/test/test.js
+++ b/test/test.js
@@ -6,8 +6,8 @@ var grunt = require('grunt')
   , opts = { gruntfile: path.join(testDir, 'Gruntfile.js') }
   , tasks = ['sed']
   , testFilePath = path.join(testDir, 'test.txt')
-  , input = ['search', '12-21-2012', 'LOWERCASE'].join('\n')
-  , output = ['replace', '12-21-endOfWorld', 'lowercase'].join('\n')
+  , input = ['search', '12-21-2012', 'LOWERCASE', 'YY'].join('\n')
+  , output = ['replace', '12-21-endOfWorld', 'lowercase', 'ZZ'].join('\n')
 
 fs.writeFileSync(testFilePath, input);