diff --git a/src/Robertfausk/Behat/PantherExtension/ServiceContainer/Driver/PantherFactory.php b/src/Robertfausk/Behat/PantherExtension/ServiceContainer/Driver/PantherFactory.php
index b7355c3..ed9e4bd 100644
--- a/src/Robertfausk/Behat/PantherExtension/ServiceContainer/Driver/PantherFactory.php
+++ b/src/Robertfausk/Behat/PantherExtension/ServiceContainer/Driver/PantherFactory.php
@@ -52,7 +52,7 @@ public function buildDriver(array $config)
         return new Definition(
             'Behat\Mink\Driver\PantherDriver',
             array(
-                $config['options']
+                $config['options'] ?? [],
             )
         );
     }
diff --git a/tests/Unit/Driver/PantherFactoryTest.php b/tests/Unit/Driver/PantherFactoryTest.php
index e4fdea6..848650a 100644
--- a/tests/Unit/Driver/PantherFactoryTest.php
+++ b/tests/Unit/Driver/PantherFactoryTest.php
@@ -70,6 +70,6 @@ public function test_build_driver_without_options(): void
         $arguments = $definition->getArguments();
 
         $this->assertArrayHasKey(0, $arguments, 'Arguments of definition should not be empty.');
-        $this->assertSame(null, $arguments[0]);
+        $this->assertSame([], $arguments[0]);
     }
 }