diff --git a/tests/Model/BaseModelTest.php b/tests/Model/BaseModelTest.php
index a9d48f4..b61129a 100644
--- a/tests/Model/BaseModelTest.php
+++ b/tests/Model/BaseModelTest.php
@@ -2,9 +2,15 @@
 
 declare(strict_types=1);
 
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Model;
 
 class BaseModelTest extends \PHPUnit_Framework_TestCase
 {
-
 }
diff --git a/tests/Model/Domain/ConnectionResponseTest.php b/tests/Model/Domain/ConnectionResponseTest.php
index ded1cc7..78fecd0 100644
--- a/tests/Model/Domain/ConnectionResponseTest.php
+++ b/tests/Model/Domain/ConnectionResponseTest.php
@@ -2,6 +2,13 @@
 
 declare(strict_types=1);
 
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Model\Domain;
 
 use Mailgun\Model\Domain\ConnectionResponse;
@@ -12,7 +19,7 @@ class ConnectionResponseTest extends BaseModelTest
     public function testCreate()
     {
         $json =
-<<<JSON
+<<<'JSON'
 {
   "connection": {
     "require_tls": false,
diff --git a/tests/Model/Domain/CreateCredentialResponseTest.php b/tests/Model/Domain/CreateCredentialResponseTest.php
index 43982df..59b3fff 100644
--- a/tests/Model/Domain/CreateCredentialResponseTest.php
+++ b/tests/Model/Domain/CreateCredentialResponseTest.php
@@ -2,9 +2,15 @@
 
 declare(strict_types=1);
 
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Model\Domain;
 
-use Mailgun\Model\Domain\ConnectionResponse;
 use Mailgun\Model\Domain\CreateCredentialResponse;
 use Mailgun\Tests\Model\BaseModelTest;
 
@@ -13,7 +19,7 @@ class CreateCredentialResponseTest extends BaseModelTest
     public function testCreate()
     {
         $json =
-<<<JSON
+<<<'JSON'
 {
   "message": "Created 1 credentials pair(s)"
 }
diff --git a/tests/Model/Domain/CreateResponseTest.php b/tests/Model/Domain/CreateResponseTest.php
index b1aab9e..fe553a6 100644
--- a/tests/Model/Domain/CreateResponseTest.php
+++ b/tests/Model/Domain/CreateResponseTest.php
@@ -2,12 +2,16 @@
 
 declare(strict_types=1);
 
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Model\Domain;
 
-use Mailgun\Model\Domain\ConnectionResponse;
-use Mailgun\Model\Domain\CreateCredentialResponse;
 use Mailgun\Model\Domain\CreateResponse;
-use Mailgun\Model\Domain\CredentialResponse;
 use Mailgun\Tests\Model\BaseModelTest;
 
 class CreateResponseTest extends BaseModelTest
@@ -15,7 +19,7 @@ class CreateResponseTest extends BaseModelTest
     public function testCreate()
     {
         $json =
-<<<JSON
+<<<'JSON'
 {
   "domain": {
     "name": "example.com",
diff --git a/tests/Model/Domain/CredentialResponseItemTest.php b/tests/Model/Domain/CredentialResponseItemTest.php
index ea33c1b..6be18bf 100644
--- a/tests/Model/Domain/CredentialResponseItemTest.php
+++ b/tests/Model/Domain/CredentialResponseItemTest.php
@@ -2,11 +2,15 @@
 
 declare(strict_types=1);
 
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Model\Domain;
 
-use Mailgun\Model\Domain\ConnectionResponse;
-use Mailgun\Model\Domain\CreateCredentialResponse;
-use Mailgun\Model\Domain\CredentialResponse;
 use Mailgun\Model\Domain\CredentialResponseItem;
 use Mailgun\Tests\Model\BaseModelTest;
 
@@ -15,7 +19,7 @@ class CredentialResponseItemTest extends BaseModelTest
     public function testCreate()
     {
         $json =
-<<<JSON
+<<<'JSON'
 {
   "size_bytes": 5,
   "created_at": "Tue, 27 Sep 2011 20:24:22 GMT",
diff --git a/tests/Model/Domain/CredentialResponseTest.php b/tests/Model/Domain/CredentialResponseTest.php
index c0911c7..1467d99 100644
--- a/tests/Model/Domain/CredentialResponseTest.php
+++ b/tests/Model/Domain/CredentialResponseTest.php
@@ -2,10 +2,15 @@
 
 declare(strict_types=1);
 
+/*
+ * Copyright (C) 2013 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license. See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Model\Domain;
 
-use Mailgun\Model\Domain\ConnectionResponse;
-use Mailgun\Model\Domain\CreateCredentialResponse;
 use Mailgun\Model\Domain\CredentialResponse;
 use Mailgun\Tests\Model\BaseModelTest;
 
@@ -14,7 +19,7 @@ class CredentialResponseTest extends BaseModelTest
     public function testCreate()
     {
         $json =
-<<<JSON
+<<<'JSON'
 {
   "total_count": 2,
   "items": [
@@ -36,6 +41,5 @@ JSON;
         $model = CredentialResponse::create(json_decode($json, true));
         $this->assertEquals(2, $model->getTotalCount());
         $this->assertCount(2, $model->getCredentials());
-
     }
 }
diff --git a/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php b/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php
index a90e912..635b627 100644
--- a/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php
+++ b/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php
@@ -11,7 +11,6 @@ namespace Mailgun\Tests\Model\Suppression\Unsubscribe;
 
 use Mailgun\Model\Suppression\Unsubscribe\Unsubscribe;
 use Mailgun\Tests\Model\BaseModelTest;
-use PHPUnit_Framework_TestCase;
 
 class UnsubscribeTest extends BaseModelTest
 {