🔧 Try tweaking test timings

tests/run-test.sh

@@ -141,14 +141,12 @@ test_effect() {
   set_setting "open-preview-effect" "${1}"
   set_setting "close-preview-effect" "${1}"
 
-  sleep 2
   do_in_pod gnome-extensions prefs "${EXTENSION}"
-  sleep 2
+  sleep 3
   compare_with_target "tests/references/${1}-open-${SESSION}-${FEDORA_VERSION}.png" "Failed to test ${1} window open effect!"
   send_keystroke "Alt+F4"
-  sleep 2
+  sleep 3
   compare_with_target "tests/references/${1}-close-${SESSION}-${FEDORA_VERSION}.png" "Failed to test ${1} window close effect!"
-  sleep 2
 }
 
 # ----------------------------------------------------- wait for the container to start up