Evitar migracao desnecessaria no teste unitario de exemplo

tests/Unit/ExampleTest.php

@@ -2,13 +2,10 @@
 
 namespace Tests\Unit;
 
-use Illuminate\Foundation\Testing\RefreshDatabase;
-use Tests\TestCase;
+use PHPUnit\Framework\TestCase;
 
 class ExampleTest extends TestCase
 {
-    use RefreshDatabase;
-
     public function test_that_true_is_true()
     {
         $this->assertTrue(true);