Update a batch of failing tests

tests/TestCase.php

@@ -8,8 +8,22 @@ abstract class TestCase extends BaseTestCase
 {
     use CreatesApplication;
 
+    /**
+     * Setup tests.
+     */
     public function setUp()
     {
         parent::setUp();
+
+        $this->setKnownUuidFactory();
+    }
+
+    /**
+     * Handles the known UUID handling in certain unit tests. Use the "KnownUuid" trait
+     * in order to enable this ability.
+     */
+    public function setKnownUuidFactory()
+    {
+        // do nothing
     }
 }