diff --git a/composer.json b/composer.json
index ff8aee6027c4..e29e5dcd9c33 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         "phpunit/phpcov": "^9.0.2 || ^10.0",
         "phpunit/phpunit": "^10.5.16 || ^11.2",
         "predis/predis": "^3.0",
-        "rector/rector": "2.2.4",
+        "rector/rector": "2.2.5",
         "shipmonk/phpstan-baseline-per-identifier": "^2.0"
     },
     "replace": {
diff --git a/rector.php b/rector.php
index f2aed4ac2969..e5b29eead7ff 100644
--- a/rector.php
+++ b/rector.php
@@ -36,6 +36,7 @@
 use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 use Rector\PHPUnit\CodeQuality\Rector\Class_\RemoveDataProviderParamKeysRector;
 use Rector\PHPUnit\CodeQuality\Rector\Class_\YieldDataProviderRector;
+use Rector\PHPUnit\CodeQuality\Rector\FuncCall\AssertFuncCallToPHPUnitAssertRector;
 use Rector\Privatization\Rector\Property\PrivatizeFinalClassPropertyRector;
 use Rector\Strict\Rector\Empty_\DisallowedEmptyRuleFixerRector;
 use Rector\TypeDeclaration\Rector\ArrowFunction\AddArrowFunctionReturnTypeRector;
@@ -172,6 +173,11 @@
 
         // needs separate PR for activation to allow more depth review
         FunctionLikeToFirstClassCallableRector::class,
+
+        AssertFuncCallToPHPUnitAssertRector::class => [
+            // use $this inside static closure
+            __DIR__ . '/tests/system/AutoReview/FrameworkCodeTest.php',
+        ],
     ])
     // auto import fully qualified class names
     ->withImportNames(removeUnusedImports: true)
diff --git a/system/Router/RouteCollection.php b/system/Router/RouteCollection.php
index 7379d014cc09..feb161bdfc92 100644
--- a/system/Router/RouteCollection.php
+++ b/system/Router/RouteCollection.php
@@ -1574,7 +1574,7 @@ private function checkHostname($hostname): bool
 
         // Has multiple hostnames
         if (is_array($hostname)) {
-            $hostnameLower = array_map('strtolower', $hostname);
+            $hostnameLower = array_map(strtolower(...), $hostname);
 
             return in_array(strtolower($this->httpHost), $hostnameLower, true);
         }
diff --git a/tests/system/CommonSingleServiceTest.php b/tests/system/CommonSingleServiceTest.php
index f3e3bb57b40b..014ac12a27fc 100644
--- a/tests/system/CommonSingleServiceTest.php
+++ b/tests/system/CommonSingleServiceTest.php
@@ -37,7 +37,7 @@ public function testSingleServiceWithNoParamsSupplied(string $service): void
         $service1 = single_service($service); // @phpstan-ignore codeigniter.unknownServiceMethod
         $service2 = single_service($service); // @phpstan-ignore codeigniter.unknownServiceMethod
 
-        assert($service1 !== null);
+        $this->assertNotNull($service1);
 
         $this->assertInstanceOf($service1::class, $service2);
         $this->assertNotSame($service1, $service2);
@@ -65,7 +65,7 @@ public function testSingleServiceWithAtLeastOneParamSupplied(string $service): v
         $service1 = single_service($service, ...$params); // @phpstan-ignore codeigniter.unknownServiceMethod
         $service2 = single_service($service, ...$params); // @phpstan-ignore codeigniter.unknownServiceMethod
 
-        assert($service1 !== null);
+        $this->assertNotNull($service1);
 
         $this->assertInstanceOf($service1::class, $service2);
         $this->assertNotSame($service1, $service2);
@@ -120,8 +120,8 @@ public function testSingleServiceWithAllParamsSupplied(): void
         $cache1 = single_service('cache', null, true);
         $cache2 = single_service('cache', null, true);
 
-        assert($cache1 !== null);
-        assert($cache2 !== null);
+        $this->assertNotNull($cache1);
+        $this->assertNotNull($cache2);
 
         // Assert that even passing true as last param this will
         // not create a shared instance.