diff --git a/tests/Template/ClassStringMapTest.php b/tests/Template/ClassStringMapTest.php
index ba0b90b39b0..03904459c50 100644
--- a/tests/Template/ClassStringMapTest.php
+++ b/tests/Template/ClassStringMapTest.php
@@ -99,6 +99,28 @@ public function set(string $key, object $obj): void {
                     }'
                     ,
             ],
+            'assignClassStringMapInConstruct' => [
+                'code' => '<?php
+                    class A {
+                        /** @var class-string-map<T,T> */
+                        private array $map;
+                        /** @param class-string-map<T,T> $map */
+                        public function __construct(array $map) {
+                            $this->map = $map;
+                        }
+                    }',
+            ],
+            'assignClassStringMapInMethod' => [
+                'code' => '<?php
+                    class A {
+                        /** @var class-string-map<T,T> */
+                        private array $map = [];
+                        /** @param class-string-map<T,T> $map */
+                        public function set(array $map) {
+                            $this->map = $map;
+                        }
+                    }',
+            ],
         ];
     }