diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
deleted file mode 100644
index eb8b0e4..0000000
--- a/.github/workflows/test.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-name: test
-
-on:
-  push:
-    branches:
-      - master
-      - main
-  pull_request:
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v6
-      - uses: erlef/setup-beam@v1
-        with:
-          otp-version: "29"
-          gleam-version: "1.17.0"
-          rebar3-version: "3"
-          # elixir-version: "1"
-      - run: gleam deps download
-      - run: gleam test
-      - run: gleam format --check src test
diff --git a/.tangled/workflows/test.yml b/.tangled/workflows/test.yml
new file mode 100644
index 0000000..42b571b
--- /dev/null
+++ b/.tangled/workflows/test.yml
@@ -0,0 +1,22 @@
+when:
+  - event: ["push"]
+    branch: ["master", "main"]
+  - event: ["pull_request"]
+    branch: ["master", "main"]
+  - event: ["manual"]
+
+engine: "nixery"
+
+dependencies:
+  nixpkgs:
+    - gleam
+    - erlang
+    - rebar3
+
+steps:
+  - name: "Download dependencies"
+    command: "gleam deps download"
+  - name: "Run tests"
+    command: "gleam test"
+  - name: "Check formatting"
+    command: "gleam format --check src test"