Include new line at the end of the file.

tests/CreatesApplication.php

@@ -19,4 +19,4 @@ trait CreatesApplication
 
         return $app;
     }
-}
+}

tests/Feature/ExampleTest.php

@@ -20,4 +20,4 @@ class ExampleTest extends TestCase
 
         $response->assertStatus(200);
     }
-}
+}

tests/TestCase.php

@@ -12,4 +12,4 @@ use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
 abstract class TestCase extends BaseTestCase
 {
     use CreatesApplication;
-}
+}

tests/Unit/ExampleTest.php

@@ -17,4 +17,4 @@ class ExampleTest extends TestCase
     {
         $this->assertTrue(true);
     }
-}
+}