diff --git a/lodash.js b/lodash.js
index a111b5c41..8e51b8255 100644
--- a/lodash.js
+++ b/lodash.js
@@ -585,6 +585,7 @@
         'while (++argsIndex < argsLength) {\n' +
         '  iterable = args[argsIndex];\n' +
         '  if (iterable && objectTypes[typeof iterable]) {',
+      'arrays': false,
       'loop': "if (typeof result[index] == 'undefined') result[index] = iterable[index]",
       'bottom': '  }\n}'
     };
diff --git a/test/test.js b/test/test.js
index 4ba65ce10..f260ca850 100644
--- a/test/test.js
+++ b/test/test.js
@@ -706,19 +706,21 @@
       deepEqual(func({}, new Foo), {});
     });
 
-    test('lodash.' + methodName + ' should treat sparse arrays as dense', function() {
-      var array = Array(3);
-      array[0] = 1;
-      array[2] = 3;
+    if (methodName == 'merge') {
+      test('lodash.' + methodName + ' should treat sparse arrays as dense', function() {
+        var array = Array(3);
+        array[0] = 1;
+        array[2] = 3;
 
-      var actual = func([], array),
-          expected = array.slice();
+        var actual = func([], array),
+            expected = array.slice();
 
-      expected[1] = undefined;
+        expected[1] = undefined;
 
-      ok(1 in actual);
-      deepEqual(actual, expected);
-    });
+        ok(1 in actual);
+        deepEqual(actual, expected);
+      });
+    }
   });
 
   /*--------------------------------------------------------------------------*/