diff --git a/Tests/SymfonyRollbarBundle/Twig/RollbarExtensionTest.php b/Tests/SymfonyRollbarBundle/Twig/RollbarExtensionTest.php
index b1696f0..773d130 100755
--- a/Tests/SymfonyRollbarBundle/Twig/RollbarExtensionTest.php
+++ b/Tests/SymfonyRollbarBundle/Twig/RollbarExtensionTest.php
@@ -44,6 +44,8 @@ public function testRollbarJs($env, $isDisabled)
             $this->assertInstanceOf(\Twig_SimpleFunction::class, $function);
 
             $output = $rollbarTwig->rollbarJs();
+
+            $this->assertNotContains('var _rollbarConfig = var _rollbarConfig', $output);
             $this->assertContains('_rollbarConfig', $output);
             $this->assertContains('SOME_ROLLBAR_ACCESS_TOKEN_654321', $output);
             $this->assertContains('_rollbarConfig.rollbarJsUrl', $output);