diff --git a/apps/files_sharing/lib/External/Storage.php b/apps/files_sharing/lib/External/Storage.php
index 7411d3c51b622..58da845639410 100644
--- a/apps/files_sharing/lib/External/Storage.php
+++ b/apps/files_sharing/lib/External/Storage.php
@@ -32,6 +32,7 @@
 
 use GuzzleHttp\Exception\ClientException;
 use GuzzleHttp\Exception\ConnectException;
+use GuzzleHttp\Exception\RequestException;
 use OC\Files\Storage\DAV;
 use OC\ForbiddenException;
 use OCA\Files_Sharing\ISharedStorage;
@@ -280,6 +281,8 @@ private function testRemoteUrl($url) {
 			$returnValue = false;
 		} catch (ClientException $e) {
 			$returnValue = false;
+		} catch (RequestException $e) {
+			$returnValue = false;
 		}
 
 		$cache->set($url, $returnValue, 60*60*24);