diff --git a/spec/options/options_validation.spec.js b/spec/options/options_validation.spec.js
index e362826bc3..3ae01e4743 100644
--- a/spec/options/options_validation.spec.js
+++ b/spec/options/options_validation.spec.js
@@ -26,12 +26,30 @@ describe('validation options', function() {
       }});
 
       var validate = ajv.compile({ format: 'identifier' });
+
       validate('Abc1') .should.equal(true);
       validate('123') .should.equal(false);
       validate(123) .should.equal(true);
     });
   });
 
+  describe('keywords', function() {
+    it('should add keywords from options', function() {
+      var ajv = new Ajv({ keywords: {
+        identifier: {
+          validate: function (schema, data) {
+            return !data;
+          }
+        }
+      }});
+
+      var validate = ajv.compile({ identifier: true });
+
+      validate(true) .should.equal(false);
+      validate(false).should.equal(true);
+    });
+  });
+
 
   describe('uniqueItems', function() {
     it('should not validate uniqueItems with uniqueItems option == false', function() {