diff --git a/ci/run-integration-tests.ps1 b/ci/run-integration-tests.ps1
index a853e0f..d57d6f9 100644
--- a/ci/run-integration-tests.ps1
+++ b/ci/run-integration-tests.ps1
@@ -10,7 +10,7 @@ if (!$Keys.TestResourceKey) {
     return
 }
 
-$env:RESOURCEKEY = $Keys.TestResourceKey
+$env:resource_key = $Keys.TestResourceKey
 
 ./php/run-integration-tests.ps1 -RepoName $RepoName
 
diff --git a/phpunit.xml b/phpunit.xml
index a4a27d4..85e6fe7 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,6 +1,6 @@
 <phpunit bootstrap="vendor/autoload.php">
   <php>
-    <env name="RESOURCEKEY" value="!!YOUR_RESOURCE_KEY!!"/>
+    <env name="resource_key" value="!!YOUR_RESOURCE_KEY!!"/>
   </php>
   <testsuites>
     <testsuite name="Unit">
diff --git a/tests/CloudRequestTests.php b/tests/CloudRequestTests.php
index 4aca2ea..1d6796a 100644
--- a/tests/CloudRequestTests.php
+++ b/tests/CloudRequestTests.php
@@ -1,24 +1,24 @@
 <?php
-/* *********************************************************************
- * This Original Work is copyright of 51 Degrees Mobile Experts Limited.
- * Copyright 2023 51 Degrees Mobile Experts Limited, Davidson House,
- * Forbury Square, Reading, Berkshire, United Kingdom RG1 3EU.
- *
- * This Original Work is licensed under the European Union Public Licence
- * (EUPL) v.1.2 and is subject to its terms as set out below.
- *
- * If a copy of the EUPL was not distributed with this file, You can obtain
- * one at https://opensource.org/licenses/EUPL-1.2.
- *
- * The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
- * amended by the European Commission) shall be deemed incompatible for
- * the purposes of the Work and the provisions of the compatibility
- * clause in Article 5 of the EUPL shall not apply.
- *
- * If using the Work as, or as part of, a network application, by
- * including the attribution notice(s) required under Article 5 of the EUPL
- * in the end user terms of the application under an appropriate heading,
- * such notice(s) shall fulfill the requirements of that article.
+/* *********************************************************************
+ * This Original Work is copyright of 51 Degrees Mobile Experts Limited.
+ * Copyright 2023 51 Degrees Mobile Experts Limited, Davidson House,
+ * Forbury Square, Reading, Berkshire, United Kingdom RG1 3EU.
+ *
+ * This Original Work is licensed under the European Union Public Licence
+ * (EUPL) v.1.2 and is subject to its terms as set out below.
+ *
+ * If a copy of the EUPL was not distributed with this file, You can obtain
+ * one at https://opensource.org/licenses/EUPL-1.2.
+ *
+ * The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
+ * amended by the European Commission) shall be deemed incompatible for
+ * the purposes of the Work and the provisions of the compatibility
+ * clause in Article 5 of the EUPL shall not apply.
+ *
+ * If using the Work as, or as part of, a network application, by
+ * including the attribution notice(s) required under Article 5 of the EUPL
+ * in the end user terms of the application under an appropriate heading,
+ * such notice(s) shall fulfill the requirements of that article.
  * ********************************************************************* */
 
 namespace fiftyone\pipeline\cloudrequestengine\tests;
@@ -33,7 +33,7 @@ class CloudRequestTests extends CloudRequestEngineTestsBase
 {
     public function testCloudRequestEngine()
     {
-        $params = ['resourceKey' => $_ENV['RESOURCEKEY']];
+        $params = ['resourceKey' => $this->getResourceKey()];
 
         $this->assertNotSame(
             '!!YOUR_RESOURCE_KEY!!',
@@ -73,7 +73,7 @@ public function testCloudRequestEngine()
      */
     public function testCloudPostRequestWithSequenceEvidence()
     {
-        $params = ['resourceKey' => $_ENV['RESOURCEKEY']];
+        $params = ['resourceKey' => $this->getResourceKey()];
 
         $this->assertNotSame(
             '!!YOUR_RESOURCE_KEY!!',
@@ -121,7 +121,7 @@ public function testCloudGetRequestWithSequenceEvidence()
         $httpClient = new HttpClient();
 
         $params = [
-            'resourceKey' => $_ENV['RESOURCEKEY'],
+            'resourceKey' => $this->getResourceKey(),
             'httpClient' => $httpClient
         ];
 
@@ -202,7 +202,7 @@ public function testHttpDataSetInException()
     public function testPipelineSuppressesExceptionsWhenCloudServiceIsDown()
     {
         $params = [
-            'resourceKey' => $_ENV['RESOURCEKEY'],
+            'resourceKey' => $this->getResourceKey(),
             'httpClient' => $this->mockHttp()
         ];
 
@@ -246,7 +246,7 @@ public function testPipelineSuppressesExceptionsWhenCloudServiceIsDown()
     public function testPipelineDoesNotSuppressExceptionsWhenCloudServiceIsDown()
     {
         $params = [
-            'resourceKey' => $_ENV['RESOURCEKEY'],
+            'resourceKey' => $this->getResourceKey(),
             'httpClient' => $this->mockHttp()
         ];
 
@@ -277,4 +277,9 @@ public function testPipelineDoesNotSuppressExceptionsWhenCloudServiceIsDown()
         $this->expectException(CloudRequestException::class);
         $fd->process();
     }
+
+    private function getResourceKey()
+    {
+        return $_ENV[self::resourceKey] ?? null;
+    }
 }