Added test for issue briannesbitt#1073.

.travis.yml

@@ -10,6 +10,7 @@ php:
   - 5.5
   - 5.6
   - 7.0
+  - 7.0.22
   - 7.1
   - hhvm
 

tests/IssueTest.php

@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of the Carbon package.
+ *
+ * (c) Brian Nesbitt <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Tests;
+
+use Carbon\Carbon;
+use Tests\AbstractTestCase;
+
+class IssueTest extends AbstractTestCase
+{
+    public function testIssue1073()
+    {
+		$date = \DateTime::createFromFormat('Y-m-d\TH:i:s.uT', '2017-07-29T13:57:27.123456Z');
+		$d1 = $date->format('Y-m-d H:i:s.u e'); // 2017-07-29 13:57:27.123456 Z
+
+		$date = Carbon::createFromFormat('Y-m-d\TH:i:s.uT', '2017-07-29T13:57:27.123456Z');
+		$d2 = $date->format('Y-m-d H:i:s.u e'); // 2017-07-29 13:57:27.000000 Z
+
+        $this->assertTrue($d1 === $d2);
+    }
+}