diff --git a/src/Codeception/Module/WebDriver.php b/src/Codeception/Module/WebDriver.php
index 09d82165..270ff1a3 100644
--- a/src/Codeception/Module/WebDriver.php
+++ b/src/Codeception/Module/WebDriver.php
@@ -509,7 +509,7 @@ public function _after(TestInterface $test)
     public function _failed(TestInterface $test, $fail)
     {
         $this->debugWebDriverLogs($test);
-        $filename = preg_replace('~\W~', '.', Descriptor::getTestSignatureUnique($test));
+        $filename = preg_replace('~[^a-zA-Z0-9\x80-\xff]~', '.', Descriptor::getTestSignatureUnique($test));
         $outputDir = codecept_output_dir();
         $this->_saveScreenshot($report = $outputDir . mb_strcut($filename, 0, 245, 'utf-8') . '.fail.png');
         $test->getMetadata()->addReport('png', $report);