diff --git a/circle.yml b/circle.yml
index 5987749..a226b15 100644
--- a/circle.yml
+++ b/circle.yml
@@ -10,5 +10,6 @@ dependencies:
     - "node_modules"
 test:
   override:
+    - obt demo --demo-filter pa11y --suppress-errors
     - obt verify
     - obt test