diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ec45193e..edc6f422 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -5,6 +5,7 @@ on:  # yamllint disable-line rule:truthy
   push:
     branches: ['master']
   pull_request:
+  workflow_call:
 
 jobs:
   pytest:
diff --git a/.github/workflows/scheduled.yaml b/.github/workflows/scheduled.yaml
new file mode 100644
index 00000000..01d91dee
--- /dev/null
+++ b/.github/workflows/scheduled.yaml
@@ -0,0 +1,11 @@
+---
+name: Run tests periodically
+
+on:  # yamllint disable-line rule:truthy
+  pull_request:
+  schedule:
+    - cron: '40 7 * * 0'
+
+jobs:
+  pytest:
+    uses: ./.github/workflows/ci.yaml