fixing tests

Author: vearutop

README.md

@@ -1,5 +1,10 @@
 # Swaggest JSON-schema implementation for PHP
 
+[![Build Status](https://travis-ci.org/swaggest/php-json-schema.svg?branch=master)](https://travis-ci.org/swaggest/php-json-schema)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/swaggest/php-json-schema/badges/quality-score.png?b=spec-compliance)](https://scrutinizer-ci.com/g/swaggest/php-json-schema/?branch=spec-compliance)
+[![Code Climate](https://codeclimate.com/github/swaggest/php-json-schema/badges/gpa.svg)](https://codeclimate.com/github/swaggest/php-json-schema)
+[![Test Coverage](https://codeclimate.com/github/swaggest/php-json-schema/badges/coverage.svg)](https://codeclimate.com/github/swaggest/php-json-schema/coverage)
+
 High definition PHP structures with JSON-schema based validation.
 
 ## Installation

tests/src/PHPUnit/Example/ExampleTest.php

@@ -100,7 +100,7 @@ public function testExample()
         $example->name = 'John Doe';
 
         $order = new Order();
-        $order->dateTime = (new \DateTime())->format(DATE_RFC3339);
+        $order->dateTime = '2015-10-28T07:28:00Z';
         $example->orders[] = $order;
 
         Example::export($example); // Exception: Required property missing: id at #->properties:orders->items[0]