diff --git a/tests/ThisOutTest.php b/tests/ThisOutTest.php
index 9c7adbdd563..b3652771543 100644
--- a/tests/ThisOutTest.php
+++ b/tests/ThisOutTest.php
@@ -55,6 +55,7 @@ public function __construct($data) { $this->data = [$data]; }
                          * @psalm-this-out self<NewT>
                          */
                         public function setData($data): void {
+                            /** @psalm-suppress InvalidPropertyAssignmentValue */
                             $this->data = [$data];
                         }
                         /**
@@ -64,6 +65,7 @@ public function setData($data): void {
                          * @psalm-this-out self<T|NewT>
                          */
                         public function addData($data): void {
+                            /** @psalm-suppress InvalidPropertyAssignmentValue */
                             $this->data []= $data;
                         }
                         /**
@@ -83,10 +85,6 @@ public function getData(): array { return $this->data; }
                     '$data1===' => 'list<1>',
                     '$data2===' => 'list<2>',
                     '$data3===' => 'list<2|3>',
-                ],
-                'ignored_issues' => [
-                    'PropertyTypeCoercion',
-                    'InvalidPropertyAssignmentValue'
                 ]
             ]
         ];