Add project variable tests

tests/e2e/Services/Project/VariablesCustomServerTest.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Tests\E2E\Services\Project;
+
+use Tests\E2E\Scopes\ProjectCustom;
+use Tests\E2E\Scopes\Scope;
+use Tests\E2E\Scopes\SideServer;
+
+class VariablesCustomServerTest extends Scope
+{
+    use VariablesBase;
+    use ProjectCustom;
+    use SideServer;
+}