diff --git a/.github/workflows/run-htmltest.yml b/.github/workflows/run-htmltest.yml
index ae879f80b5..8be5e281a5 100644
--- a/.github/workflows/run-htmltest.yml
+++ b/.github/workflows/run-htmltest.yml
@@ -8,7 +8,7 @@ name: run-htmltest-external
 on:
   schedule:
     # 10am UTC on weekdays
-    - cron: '0 10 * * 1,2,3,4,5'
+    - cron: '0 10,13,14,15 * * 1,2,3,4,5'
 jobs:
   htmltest:
     runs-on: ubuntu-large