diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fa9e735..69c8b77 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,6 +8,10 @@ on:
   # Allow job to be triggered manually.
   workflow_dispatch:
 
+  # Run job each night.
+  schedule:
+    - cron: '0 4 * * *'
+
 # Cancel in-progress jobs when pushing to the same branch.
 concurrency:
   cancel-in-progress: true
@@ -17,8 +21,9 @@ jobs:
   tests:
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        os: [ "ubuntu-22.04", "macos-13" ] # , windows-latest ]
+        os: [ "ubuntu-22.04", "macos-15-intel" ] # , windows-latest ]
         ruby-version: [ "2.4", "2.5", "2.6", "2.7", "3.0", "3.1", "3.2" ]
 
     name: Ruby ${{ matrix.ruby-version }} on OS ${{ matrix.os }}