diff --git a/.docker/Dockerfile b/.docker/Dockerfile
deleted file mode 100644
index c31860a..0000000
--- a/.docker/Dockerfile
+++ /dev/null
@@ -1,20 +0,0 @@
-ARG QGIS_TEST_VERSION=latest
-FROM  qgis/qgis:${QGIS_TEST_VERSION}
-MAINTAINER Matthias Kuhn <matthias@opengis.ch>
-
-RUN apt-get update \
-    && apt-get install -y python3-pip \
-    && rm -rf /var/lib/apt/lists/*
-
-COPY ./requirements.txt /tmp/
-
-# images for QGIS<=3.34 uses much older `pip` that does not support `--break-system-packages`
-RUN pip3 install -r /tmp/requirements.txt || pip3 install -r /tmp/requirements.txt --break-system-packages
-
-ENV PYTHONPATH=/usr/share/qgis/python/plugins
-ENV LANG=C.UTF-8
-
-COPY ./ /usr/src/
-RUN chmod a+x /usr/src/.docker/run-docker-tests.sh
-
-WORKDIR /
\ No newline at end of file
diff --git a/.docker/run-docker-tests.sh b/.docker/run-docker-tests.sh
deleted file mode 100644
index ef51ecc..0000000
--- a/.docker/run-docker-tests.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/usr/bin/env bash
-#***************************************************************************
-#                             -------------------
-#       begin                : 2017-08-24
-#       git sha              : :%H$
-#       copyright            : (C) 2017 by OPENGIS.ch
-#       email                : info@opengis.ch
-#***************************************************************************
-#
-#***************************************************************************
-#*                                                                         *
-#*   This program is free software; you can redistribute it and/or modify  *
-#*   it under the terms of the GNU General Public License as published by  *
-#*   the Free Software Foundation; either version 2 of the License, or     *
-#*   (at your option) any later version.                                   *
-#*                                                                         *
-#***************************************************************************
-set -e
-
-pushd /usr/src/
-xvfb-run pytest
-popd
\ No newline at end of file
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 44de453..4b95d1b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,21 +8,28 @@ on:
     branches:
       - main
 
+env:
+  QGIS_TEST_VERSION: latest
+
 jobs:
   test:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        qgis_version: [latest,3.34.14-noble,final-3_28_15]  # QGIS 3.28, 3.34.x and latest
+        qgis_version: [ latest,3.34.14-noble,final-3_28_15 ]  # QGIS 3.28, 3.34.x and latest
     env:
       QGIS_TEST_VERSION: ${{ matrix.qgis_version }}
+
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
         with:
-          submodules: recursive
-      - name: Build docker image
-        run: docker build . -f .docker/Dockerfile -t docker_qgis --build-arg QGIS_TEST_VERSION=${QGIS_TEST_VERSION}
-      - name: Test on QGIS
-        run: docker run --rm -v $GITHUB_WORKSPACE:/usr/src docker_qgis bash /usr/src/.docker/run-docker-tests.sh
+          submodules: true
+
+      - name: Unit tests
+        run: >-  # The pip install instruction was only added to support QGIS 3.28.x. It can be removed when removing that QGIS version.
+          docker run
+          -e PYTHONPATH=/usr/share/qgis/python/plugins
+          -v $(pwd):/usr/src
+          -w /usr/src qgis/qgis:${QGIS_TEST_VERSION}
+          sh -c 'pip3 install -r requirements.txt || pip3 install -r requirements.txt --break-system-packages;xvfb-run pytest'
\ No newline at end of file