diff --git a/.github/workflows/scan-code.yml b/.github/workflows/scan-code.yml
index 2657594..affa744 100644
--- a/.github/workflows/scan-code.yml
+++ b/.github/workflows/scan-code.yml
@@ -1,4 +1,8 @@
-on: [push]
+on:
+  push:
+  schedule:
+    cron: "0 ? * * 1"
+
 name: scan-code
 jobs:
   scan-hlint:
diff --git a/.github/workflows/test-macos-latest.yml b/.github/workflows/test-macos-latest.yml
index 1c314c9..8168e61 100644
--- a/.github/workflows/test-macos-latest.yml
+++ b/.github/workflows/test-macos-latest.yml
@@ -1,4 +1,8 @@
-on: [push]
+on:
+  push:
+  schedule:
+    cron: "0 ? * * 1"
+
 name: test-macos-latest
 jobs:
   test-package:
diff --git a/.github/workflows/test-ubuntu-latest.yml b/.github/workflows/test-ubuntu-latest.yml
index 4ab6e31..ee0eb18 100644
--- a/.github/workflows/test-ubuntu-latest.yml
+++ b/.github/workflows/test-ubuntu-latest.yml
@@ -1,4 +1,8 @@
-on: [push]
+on:
+  push:
+  schedule:
+    cron: "0 ? * * 1"
+
 name: test-ubuntu-latest
 jobs:
   test-package:
diff --git a/.github/workflows/test-windows-latest.yml b/.github/workflows/test-windows-latest.yml
index f51bdf2..ca89623 100644
--- a/.github/workflows/test-windows-latest.yml
+++ b/.github/workflows/test-windows-latest.yml
@@ -1,4 +1,8 @@
-on: [push]
+on:
+  push:
+  schedule:
+    cron: "0 ? * * 1"
+
 name: test-windows-latest
 jobs:
   test-package: