diff --git a/mod/assign/feedback/editpdf/tests/behat/group_annotations.feature b/mod/assign/feedback/editpdf/tests/behat/group_annotations.feature
index 1bdb027afb1..56b26de5322 100644
--- a/mod/assign/feedback/editpdf/tests/behat/group_annotations.feature
+++ b/mod/assign/feedback/editpdf/tests/behat/group_annotations.feature
@@ -56,6 +56,8 @@ Feature: In a group assignment, teacher can annotate PDF files for all users
     And I click on ".navigate-next-button" "css_element"
     And I click on ".stampbutton" "css_element"
     And I click on ".drawingcanvas" "css_element"
+    And I change window size to "medium"
+    And I wait until the page is ready
     And I click on "Close" "button"
     And I press "Save changes"
     And I should see "The grade changes were saved"