diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..32b2bfc
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,5 @@
+.venv
+__pycache__
+dist
+.mypy_cache
+.github
\ No newline at end of file
diff --git a/.github/Dockerfile-gtk4 b/.github/Dockerfile-gtk4
new file mode 100644
index 0000000..d1343a6
--- /dev/null
+++ b/.github/Dockerfile-gtk4
@@ -0,0 +1,15 @@
+FROM fedora:33
+
+ENV TEST_GTK_VERSION "4.0"
+
+RUN yum install -y gcc gtk4 cairo-devel cairo-gobject-devel gobject-introspection-devel python3-devel python3-pip xorg-x11-server-Xvfb
+RUN pip3 install -U poetry pytest
+
+WORKDIR /work
+
+COPY . /work/
+
+RUN poetry install
+# Override PyGObject with the master version
+RUN poetry run pip install -U https://gitlab.gnome.org/GNOME/pygobject/-/archive/master/pygobject-master.tar.gz
+RUN poetry run xvfb-run pytest --cov=gaphas
diff --git a/.github/workflows/build-gtk4.yml b/.github/workflows/build-gtk4.yml
new file mode 100644
index 0000000..afd99e0
--- /dev/null
+++ b/.github/workflows/build-gtk4.yml
@@ -0,0 +1,12 @@
+name: build
+on:
+  push:
+
+jobs:
+  build:
+    name: GTK 4
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: docker build -f .github/Dockerfile-gtk4 .