diff --git a/tests/Integration/Testing/TestWithoutDatabaseParallelTest.php b/tests/Integration/Testing/TestWithoutDatabaseParallelTest.php
index 4735083bdea5..3e24bf2f51a7 100644
--- a/tests/Integration/Testing/TestWithoutDatabaseParallelTest.php
+++ b/tests/Integration/Testing/TestWithoutDatabaseParallelTest.php
@@ -13,16 +13,33 @@ protected function getPackageProviders($app)
         return [ParallelTestingServiceProvider::class];
     }
 
-    public function testRunningParallelTestWithoutDatabaseShouldNotCrashOnDefaultConnection()
+    /**
+     * Define the test environment.
+     *
+     * @param  \Illuminate\Foundation\Application  $app
+     * @return void
+     */
+    protected function defineEnvironment($app)
     {
         // Given an application that does not use database connections at all
-        $this->app['config']->set('database.default', null);
+        $app['config']->set('database.default', null);
 
         // When we run parallel testing with `without-databases` option
         $_SERVER['LARAVEL_PARALLEL_TESTING'] = 1;
         $_SERVER['LARAVEL_PARALLEL_TESTING_WITHOUT_DATABASES'] = 1;
         $_SERVER['TEST_TOKEN'] = '1';
 
+        $this->beforeApplicationDestroyed(function () {
+            unset(
+                $_SERVER['LARAVEL_PARALLEL_TESTING'],
+                $_SERVER['LARAVEL_PARALLEL_TESTING_WITHOUT_DATABASES'],
+                $_SERVER['TEST_TOKEN'],
+            );
+        });
+    }
+
+    public function testRunningParallelTestWithoutDatabaseShouldNotCrashOnDefaultConnection()
+    {
         // We should not create a database connection to check if it's SQLite or not.
         ParallelTesting::callSetUpProcessCallbacks();
     }