diff --git a/tests/acceptance/config/behat.yml b/tests/acceptance/config/behat.yml
index 3cd71eec04..7eee0a4da9 100644
--- a/tests/acceptance/config/behat.yml
+++ b/tests/acceptance/config/behat.yml
@@ -29,3 +29,9 @@ default:
           selenium2: ~
         Jane:
           selenium2: ~
+        Rubeus:
+          # Rubeus uses a browser that has CSS grid support.
+          selenium2:
+            capabilities:
+              firefox:
+                profile: config/firefox-profiles/css-grid-enabled.zip
diff --git a/tests/acceptance/config/firefox-profiles/css-grid-enabled.zip b/tests/acceptance/config/firefox-profiles/css-grid-enabled.zip
new file mode 100644
index 0000000000..8f061806d0
Binary files /dev/null and b/tests/acceptance/config/firefox-profiles/css-grid-enabled.zip differ