diff --git a/tests/Unit/InvitationTest.php b/tests/Unit/InvitationTest.php
index 2b185116721a..1aced3f262f4 100644
--- a/tests/Unit/InvitationTest.php
+++ b/tests/Unit/InvitationTest.php
@@ -50,11 +50,8 @@ class InvitationTest extends TestCase
 
         $this->assertEquals(1, count($invites));
 
-        $this->invoice->invitations()->each(function ($invite){
-
-            if(!$invite->contact->is_primary)
-                $invite->forceDelete();
-        });
+        /** @phpstan-ignore-next-line **/
+        $this->invoice->invitations = $invites;
 
         $this->invoice->line_items = [];
 
@@ -84,9 +81,12 @@ class InvitationTest extends TestCase
         $new_invite->key = $this->createDbHash(config('database.default'));
 
         $invitations = $this->invoice->invitations()->get();
+
         $invitations->push($new_invite);
 
+        /** @phpstan-ignore-next-line **/
         $this->invoice->invitations = $invitations->toArray();
+        
         $this->invoice->line_items = [];
 
         $response = $this->withHeaders([