diff --git a/typo3/sysext/install/Classes/SystemEnvironment/Check.php b/typo3/sysext/install/Classes/SystemEnvironment/Check.php
index 7760796..609efd6 100644
--- a/typo3/sysext/install/Classes/SystemEnvironment/Check.php
+++ b/typo3/sysext/install/Classes/SystemEnvironment/Check.php
@@ -1027,7 +1027,7 @@ class Check implements CheckInterface
             && (imagetypes() & IMG_GIF)
         ) {
             // See http://stackoverflow.com/a/13139830
-            $imageResource = @imagecreatefromgif('data://image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7');
+            $imageResource = @imagecreatefromgif(__DIR__ . '/../../Resources/Public/Images/TestInput/Test.gif');
             if (is_resource($imageResource)) {
                 imagedestroy($imageResource);
                 $status = new Status\OkStatus();
@@ -1086,7 +1086,7 @@ class Check implements CheckInterface
             && function_exists('imagepng')
             && (imagetypes() & IMG_PNG)
         ) {
-            $imageResource = @imagecreatefrompng('data://image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII');
+            $imageResource = @imagecreatefrompng(__DIR__ . '/../../Resources/Public/Images/TestInput/Test.png');
             if (is_resource($imageResource)) {
                 imagedestroy($imageResource);
                 $status = new Status\OkStatus();