diff --git a/test/utils/CustomPropTypesSpec.js b/test/utils/CustomPropTypesSpec.js
index ef6d8e152e..4254569ea8 100644
--- a/test/utils/CustomPropTypesSpec.js
+++ b/test/utils/CustomPropTypesSpec.js
@@ -167,4 +167,21 @@ describe('CustomPropTypes', function() {
       validators[2].should.not.have.been.called;
     });
   });
+
+  describe('isRequiredForA11y', function () {
+    function validate(prop) {
+      return CustomPropTypes.isRequiredForA11y(React.PropTypes.string)({p: prop}, 'p', 'Component');
+    }
+
+    it('Should validate OK when property is provided', function() {
+      let err = validate('aria-tag');
+      assert.notInstanceOf(err, Error);
+    });
+
+    it('Should return custom error message when property is not provided', function() {
+      let err = validate(null);
+      assert.instanceOf(err, Error);
+      assert.include(err.message, 'accessible for users using assistive technologies such as screen readers');
+    });
+  });
 });