Use reusable test workflow

.github/workflows/test.yml

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..be16c1c
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,12 @@
+name: Test
+on:
+  push:
+  pull_request:
+  schedule: [{ cron: "0 0 10 * *" }] # monthly https://crontab.guru/#0_0_10_*_*
+  workflow_dispatch:
+
+permissions: {}
+jobs:
+  test:
+    uses: bats-core/.github/.github/workflows/test.yml@v1
+    permissions: { contents: read }

.github/workflows/tests.yml

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
deleted file mode 100644
index 097283b..0000000
--- a/.github/workflows/tests.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-# This workflow will do a clean install of node dependencies, cache/restore them, build the source code and run tests across different versions of node
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-
-name: Tests
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2
-    - uses: actions/setup-node@7c12f8017d5436eb855f1ed4399f037a36fbd9e8 # v2
-    - uses: actions/cache@8492260343ad570701412c2f464a5877dc76bace # v2
-      with:
-        path: ~/.npm
-        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-        restore-keys: |
-          ${{ runner.os }}-node-
-    - run: npm install
-    - run: npm test