diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
new file mode 100644
index 0000000..e7e0131
--- /dev/null
+++ b/.gitea/workflows/build.yaml
@@ -0,0 +1,23 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: alpine
+    steps:
+      - name: Set up environment
+        shell: ash {0}
+        run: |
+          apk -U upgrade
+          apk add --no-cache git bash cmake build-base ninja-is-really-ninja
+      - uses: actions/checkout@v4
+      - name: Build
+        run: |
+          cmake -B build -G Ninja
+          ninja -C build
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cdbe986..f51ba3b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
-cmake_minimum_required(VERSION 4.0)
+cmake_minimum_required(VERSION 3.30)
 project(Katja)
 
 include(CTest)
diff --git a/README.md b/README.md
index 4582401..41fb2fa 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,14 @@ Pass `-DCMAKE_BUILD_TYPE=Debug` or `-DCMAKE_BUILD_TYPE=Release` to
 
 This builds a CLI that can be then found in `./build/bin/katja`.
 
+### Running the tests
+
+To run the tests follow the build instructions first and then do:
+
+```sh
+ninja -C build test
+```
+
 ## Project structure
 
 The library code is in `katja/`. Public headers are under `include/`.