diff --git a/.gitignore b/.gitignore
index 509959f..b2baa1e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,9 @@
 # SPDX-FileCopyrightText: 2021 Romain Vigier <contact AT romainvigier.fr>
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+.cache
+
 build
 node_modules
 
-**/*.ui~
-
 tests/**/_variants.js
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ffb92c4..835110a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,33 +9,70 @@ workflow:
     - if: $CI_PIPELINE_SOURCE == "web"
 
 stages:
-  - test
+  - check
   - build
 
-test:
-  stage: test
-  image: node:latest
-  rules:
-    - changes:
-      - src/**/*
-      - tests/**/*
+.python:
+  image: python:latest
+  variables:
+    PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
   cache:
+    key: python
+    paths:
+      - .cache/pip
+      - venv/
+  before_script:
+    - python -V
+    - pip install virtualenv
+    - virtualenv venv
+    - source venv/bin/activate
+
+.node:
+  image: node:latest
+  cache:
+    key: node
     paths:
       - node_modules
-  script:
-    - npm install
-    - npm run test
+  before_script:
+    - npm install --save-dev
 
-build:
-  stage: build
-  image: registry.gitlab.com/rmnvgr/nightthemeswitcher-gnome-shell-extension:latest
+lint:
+  extends: .node
+  stage: check
+  interruptible: true
   rules:
-    - if: $CI_COMMIT_TAG
-    - if: $CI_PIPELINE_SOURCE == "web"
+    - changes:
+      - src/**/*.js
+      - tests/**/*.js
+  script:
+    - npm run test-lint
+
+variants:
+  extends: .node
+  stage: check
+  interruptible: true
+  rules:
+    - changes:
+      - tests/**/*.js
+  script:
+    - npm run test-variants
+
+reuse:
+  extends: .python
+  stage: check
+  interruptible: true
+  script:
+    - pip install reuse
+    - reuse lint
+
+extension:
+  stage: build
+  interruptible: true
+  image: registry.gitlab.com/rmnvgr/nightthemeswitcher-gnome-shell-extension:latest
   script:
     - make build
   artifacts:
-    name: "$CI_COMMIT_REF_NAME"
-    expose_as: "extension"
+    name: $CI_COMMIT_REF_NAME
+    expose_as: Extension
     paths:
       - build/nightthemeswitcher@romainvigier.fr.shell-extension.zip