diff --git a/src/Service/NamingService.php b/src/Service/NamingService.php
index 183e142..5bdc300 100644
--- a/src/Service/NamingService.php
+++ b/src/Service/NamingService.php
@@ -64,7 +64,7 @@ private function findNextPossibleFilename(string $path): string
 
         return $pathInfo['dirname']
             . DIRECTORY_SEPARATOR . $newFileName
-            . ($pathInfo['extension'] ? '.' . $pathInfo['extension'] : '');
+            . (isset($pathInfo['extension']) && $pathInfo['extension'] ? '.' . $pathInfo['extension'] : '');
     }
 
     public function validateFileName(string $fileName): bool
diff --git a/tests/Unit/Image/Service/ImageResourceTest.php b/tests/Unit/Image/Service/ImageResourceTest.php
index a98cf46..cffb2f1 100644
--- a/tests/Unit/Image/Service/ImageResourceTest.php
+++ b/tests/Unit/Image/Service/ImageResourceTest.php
@@ -307,14 +307,8 @@ public static function getThumbnailPathDataProvider(): array
         ];
     }
 
-    public function getThumbnailUrlProvider()
+    public static function getThumbnailUrlProvider()
     {
-        $sut = $this->getSut();
-        $sThumbName = $this->getImageSizeAsString(
-            md5(self::FIXTURE_FILE) . '_thumb_',
-            $sut->getDefaultThumbnailSize()
-        );
-
         return [
             [
                 'sFile'      => '',
@@ -324,7 +318,7 @@ public function getThumbnailUrlProvider()
             [
                 'sFile'      => self::FIXTURE_FILE,
                 'imageSize' => null,
-                'expected'   => 'thumbs/' . $sThumbName,
+                'expected'   => 'thumbs/d0b3244693f743a542dc6a84b8f5ae22_thumb_185*185.jpg',
             ],
             [
                 'sFile'      => '111.jpg',
diff --git a/tests/Unit/Service/MediaTest.php b/tests/Unit/Service/MediaTest.php
index aa34b8a..80e20d0 100644
--- a/tests/Unit/Service/MediaTest.php
+++ b/tests/Unit/Service/MediaTest.php
@@ -293,19 +293,15 @@ public function testUploadMedia()
         $sut->uploadMedia($sSourcePath, $sDestPath, $sFileSize, $sFileType);
     }
 
-    public function getRenameDataProvider(): array
+    public static function getRenameDataProvider(): array
     {
-        $oMedia = $this->getSut(
-            namingService: ContainerFactory::getInstance()->getContainer()->get(NamingServiceInterface::class),
-        );
+        $defaultThumbnailSize = 185;
 
-        $defaultThumbnailSize = $oMedia->imageResource->getDefaultThumbnailSize();
-
-        $sThumbName = $this->getImageSizeAsString(
+        $sThumbName = self::getImageSizeAsString(
             md5(self::FIXTURE_FILE) . '_thumb_',
             $defaultThumbnailSize
         );
-        $sThumbNameNew = $this->getImageSizeAsString(
+        $sThumbNameNew = self::getImageSizeAsString(
             md5('new.jpg') . '_thumb_',
             $defaultThumbnailSize
         );
@@ -315,7 +311,7 @@ public function getRenameDataProvider(): array
         $structureExpected['root']['out']['pictures']['ddmedia']['new.jpg'] = 'some file';
         $structureExpected['root']['out']['pictures']['ddmedia']['thumbs'][$sThumbNameNew] = 'some file';
 
-        $sThumbName = $this->getImageSizeAsString(
+        $sThumbName = self::getImageSizeAsString(
             md5(self::FIXTURE_FILE) . '_thumb_',
             $defaultThumbnailSize
         );
@@ -341,19 +337,19 @@ public function getRenameDataProvider(): array
         $structure2['out']['pictures']['ddmedia'][self::FIXTURE_FOLDER] = [];
         $structureExpected2['root']['out']['pictures']['ddmedia']['folderNew'] = [];
 
-        $sThumbName = $this->getImageSizeAsString(
+        $sThumbName = self::getImageSizeAsString(
             md5(self::FIXTURE_FILE) . '_thumb_',
             $defaultThumbnailSize
         );
-        $sThumbName2 = $this->getImageSizeAsString(
+        $sThumbName2 = self::getImageSizeAsString(
             md5('new_1.jpg') . '_thumb_',
             $defaultThumbnailSize
         );
-        $sThumbName3 = $this->getImageSizeAsString(
+        $sThumbName3 = self::getImageSizeAsString(
             md5('new_1.jpg') . '_thumb_',
             $defaultThumbnailSize
         );
-        $sThumbNameNew2 = $this->getImageSizeAsString(
+        $sThumbNameNew2 = self::getImageSizeAsString(
             md5('new_2.jpg') . '_thumb_',
             $defaultThumbnailSize
         );
@@ -438,12 +434,11 @@ public function getRenameDataProvider(): array
         ];
     }
 
-    public function getDeleteDataProvider()
+    public static function getDeleteDataProvider()
     {
-        $oMedia = $this->getSut();
-        $sThumbName = $this->getImageSizeAsString(
+        $sThumbName = self::getImageSizeAsString(
             '111_thumb_',
-            $oMedia->imageResource->getDefaultThumbnailSize()
+            185
         );
 
         // scenario 1 - file in media root
@@ -579,7 +574,7 @@ protected function getImageResourceStub(
         );
     }
 
-    private function getImageSizeAsString(string $prefix, int $imageSize, $suffix = '.jpg'): string
+    private static function getImageSizeAsString(string $prefix, int $imageSize, $suffix = '.jpg'): string
     {
         return sprintf(
             '%s%d*%d%s',
diff --git a/tests/github_actions/module-medialibrary.yml b/tests/github_actions/module-medialibrary.yml
index 852c041..5257687 100644
--- a/tests/github_actions/module-medialibrary.yml
+++ b/tests/github_actions/module-medialibrary.yml
@@ -31,7 +31,7 @@ codeception:
   title: codeception
   container:
     options: '-e SELENIUM_SERVER_HOST=selenium -e BROWSER_NAME=chrome -e XDEBUG_MODE=coverage -e THEME_ID=apex'
-  configuration: '/var/www/vendor/oxid-esales/gdpr-optin-module/tests/codeception.yml'
+  configuration: '/var/www/vendor/oxid-esales/media-library-module/tests/codeception.yml'
   suite: 'acceptance'
   additional_options: '--coverage-xml=/var/www/codeception_coverage.xml'
   logfile:
diff --git a/tests/phpunit.xml b/tests/phpunit.xml
index 85e2a5c..82f25c0 100644
--- a/tests/phpunit.xml
+++ b/tests/phpunit.xml
@@ -10,7 +10,12 @@
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd"
          cacheDirectory=".phpunit.cache"
          backupStaticProperties="false"
-         requireCoverageMetadata="false">
+         requireCoverageMetadata="false"
+         displayDetailsOnTestsThatTriggerWarnings="true"
+         displayDetailsOnTestsThatTriggerNotices="true"
+         displayDetailsOnTestsThatTriggerErrors="true"
+         displayDetailsOnTestsThatTriggerDeprecations="true"
+>
     <testsuites>
         <testsuite name="Unit">
             <directory>Unit/</directory>