diff --git a/.drone.env b/.drone.env
index 6f85f457c0..cda999bfe8 100644
--- a/.drone.env
+++ b/.drone.env
@@ -1,7 +1,7 @@
 # The test runner source for API tests
-CORE_COMMITID=0331dc83cef8efb685b036649c177ee06522d212
+CORE_COMMITID=55a37041b0f4b466656534128ab8ec3624723b4a
 CORE_BRANCH=master
 
 # The test runner source for UI tests
-WEB_COMMITID=33342537425e68697e27ba8fbbdb52b51d6a5a54
+WEB_COMMITID=fb92fed62c2ff2cd6d379a00257f64f1feab1285
 WEB_BRANCH=master
diff --git a/tests/acceptance/expected-failures-webUI-on-OWNCLOUD-storage.md b/tests/acceptance/expected-failures-webUI-on-OWNCLOUD-storage.md
index db6c8059d6..1477b19e8d 100644
--- a/tests/acceptance/expected-failures-webUI-on-OWNCLOUD-storage.md
+++ b/tests/acceptance/expected-failures-webUI-on-OWNCLOUD-storage.md
@@ -12,6 +12,11 @@ Other free text and markdown formatting can be used elsewhere in the document if
 -   [webUIPreview/imageMediaViewer.feature:81](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L81)
 -   [webUIPreview/imageMediaViewer.feature:88](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L88)
 
+### [Media Viewer does not open upper case file extensions](https://github.com/owncloud/web/issues/4647)
+-   [webUIPreview/imageMediaViewer.feature:172](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L172)
+-   [webUIPreview/imageMediaViewer.feature:173](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L173)
+-   [webUIPreview/imageMediaViewer.feature:174](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L174)
+
 ### [Media Viewer preview not visible for files with .jpeg, .ogg, .webm and .gif formats](https://github.com/owncloud/ocis/issues/1490)
 -   [webUIPreview/imageMediaViewer.feature:127](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L127)
 -   [webUIPreview/imageMediaViewer.feature:136](https://github.com/owncloud/web/blob/master/tests/acceptance/features/webUIPreview/imageMediaViewer.feature#L136)