diff --git a/composer.json b/composer.json
index d96dc436..b9dfdbad 100644
--- a/composer.json
+++ b/composer.json
@@ -55,7 +55,7 @@
         "phpstan/phpstan": "^2.0.4",
         "phpstan/phpstan-deprecation-rules": "^2.0.1",
         "phpstan/phpstan-phpunit": "^2.0.2",
-        "phpstan/phpstan-strict-rules": "^2",
+        "phpstan/phpstan-strict-rules": "^2.0.1",
         "squizlabs/php_codesniffer": "^3.11.2",
         "symfony/filesystem": "^6.4.13 || ^7.2.0"
     },
diff --git a/src/WrapperRunner/SuiteLoader.php b/src/WrapperRunner/SuiteLoader.php
index 454981e4..e688f257 100644
--- a/src/WrapperRunner/SuiteLoader.php
+++ b/src/WrapperRunner/SuiteLoader.php
@@ -188,7 +188,7 @@ private function loadFiles(TestSuite $testSuite): Generator
             if ($test instanceof TestCase) {
                 $refClass = new ReflectionClass($test);
                 $filename = $refClass->getFileName();
-                assert(is_string($filename) && $filename !== '');
+                assert(is_string($filename));
                 $filename = $this->stripCwd($filename);
 
                 yield $filename => $test;