diff --git a/src/test/php/lang/reflection/unittest/InstantiationTest.class.php b/src/test/php/lang/reflection/unittest/InstantiationTest.class.php
index 06c283f..7f85691 100755
--- a/src/test/php/lang/reflection/unittest/InstantiationTest.class.php
+++ b/src/test/php/lang/reflection/unittest/InstantiationTest.class.php
@@ -11,15 +11,15 @@ class InstantiationTest {
 
   /** @return iterable */
   private function memberInitializers() {
-    yield [function($t, $args) { return $t->constructor()->newInstance($args); }];
-    yield [function($t, $args) { return $t->initializer('__construct')->newInstance($args); }];
+    yield [fn($t, $args) => $t->constructor()->newInstance($args)];
+    yield [fn($t, $args) => $t->initializer('__construct')->newInstance($args)];
   }
 
   /** @return iterable */
   private function allInitializers() {
-    yield [function($t, $args) { return $t->newInstance(...$args); }];
-    yield [function($t, $args) { return $t->constructor()->newInstance($args); }];
-    yield [function($t, $args) { return $t->initializer('__construct')->newInstance($args); }];
+    yield [fn($t, $args) => $t->newInstance(...$args)];
+    yield [fn($t, $args) => $t->constructor()->newInstance($args)];
+    yield [fn($t, $args) => $t->initializer('__construct')->newInstance($args)];
   }
 
   #[Test]
diff --git a/src/test/php/lang/reflection/unittest/VirtualPropertiesTest.class.php b/src/test/php/lang/reflection/unittest/VirtualPropertiesTest.class.php
index ad4d4b9..234c251 100755
--- a/src/test/php/lang/reflection/unittest/VirtualPropertiesTest.class.php
+++ b/src/test/php/lang/reflection/unittest/VirtualPropertiesTest.class.php
@@ -32,7 +32,7 @@ public function readonly_modifier_shown_in_string_representation($type) {
   public function virtual_property_included_in_list($type) {
     Assert::equals(
       ['fixture' => 'public readonly'],
-      array_map(function($p) { return $p->modifiers()->names(); }, iterator_to_array($type->properties()))
+      array_map(fn($p) => $p->modifiers()->names(), iterator_to_array($type->properties()))
     );
   }