Fix tests

src/test/dns-providers-test.js

@@ -913,10 +913,11 @@ describe('dns provider', function () {
             }
 
             function Route53Mock(cfg) {
-                expect(cfg).to.eql({
+                expect(_.omit(cfg, 'retryDelayOptions')).to.eql({ // retryDelayOptions is a function
                     accessKeyId: domainCopy.config.accessKeyId,
                     secretAccessKey: domainCopy.config.secretAccessKey,
-                    region: 'us-east-1'
+                    region: 'us-east-1',
+                    maxRetries: 20,
                 });
             }
             Route53Mock.prototype.getHostedZone = mockery(awsAnswerQueue);