diff --git a/src/KubernetesCluster.php b/src/KubernetesCluster.php
index 60df8ddbeabba972f70130e219c03764e89cdb58..291570e504fd4eccd8e92c95f1c3ac726e5f2a74 100644
--- a/src/KubernetesCluster.php
+++ b/src/KubernetesCluster.php
@@ -51,11 +51,16 @@ class KubernetesCluster
     protected function loadFromConfig(array $config)
     {
         switch ($config['driver'] ?? null) {
-            case 'kubeconfig': $this->configureWithKubeConfigFile($config); break;
-            case 'http': $this->configureWithHttpAuth($config); break;
-            case 'token': $this->configureWithToken($config); break;
-            case 'cluster': $this->configureInCluster($config); break;
-            case 'variable': $this->configureWithKubeConfigVariable($config); break;
+            case 'kubeconfig': $this->configureWithKubeConfigFile($config);
+                break;
+            case 'http': $this->configureWithHttpAuth($config);
+                break;
+            case 'token': $this->configureWithToken($config);
+                break;
+            case 'cluster': $this->configureInCluster($config);
+                break;
+            case 'variable': $this->configureWithKubeConfigVariable($config);
+                break;
             default: break;
         }
     }
diff --git a/tests/ConfigurationTest.php b/tests/ConfigurationTest.php
index 1eec432a3cb0901a66c8a8164d8b34e37bfe36a9..69a724505bf94d278f6e62a2892a49fa4e5e0c8d 100644
--- a/tests/ConfigurationTest.php
+++ b/tests/ConfigurationTest.php
@@ -134,7 +134,7 @@ class ConfigurationTest extends TestCase
     /**
      * @dataProvider environmentVariableContextProvider
      */
-    public function test_from_environment_variable(string $context = null, string $expectedDomain)
+    public function test_from_environment_variable(?string $context = null, string $expectedDomain)
     {
         $_SERVER['KUBECONFIG'] = __DIR__.'/cluster/kubeconfig.yaml::'.__DIR__.'/cluster/kubeconfig-2.yaml';