diff --git a/test/check-application b/test/check-application
index 9c9381b2..a8a1fcb2 100755
--- a/test/check-application
+++ b/test/check-application
@@ -1865,7 +1865,7 @@ class TestApplication(testlib.MachineCase):
         if auth:
             # Check that the checkbox is enabled when clicked on the field
             b.wait_visible("#run-image-dialog-cpu-priority-checkbox:not(:checked)")
-            b.click('#run-image-cpu-priority')
+            b.mouse('#run-image-cpu-priority button[aria-label="Decrease CPU shares"]', "click")
             b.wait_visible("#run-image-dialog-cpu-priority-checkbox:checked")
             b.set_checked("#run-image-dialog-cpu-priority-checkbox", False)