diff --git a/.github/workflows/Tests.yml b/.github/workflows/Tests.yml
new file mode 100644
index 0000000..654e76b
--- /dev/null
+++ b/.github/workflows/Tests.yml
@@ -0,0 +1,37 @@
+name: Tests
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        image: [gapsystem/gap-docker, gapsystem/gap-docker-master]
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ matrix.image }}
+    steps:
+      - uses: actions/checkout@v1
+      - run: mkdir -p /home/gap/.gap/pkg/
+      - run: sudo cp -a $GITHUB_WORKSPACE /home/gap/.gap/pkg/
+      - run: sudo chown -R gap:gap /home/gap/.gap/pkg/
+      - run: |
+          export HOME="/home/gap"
+          cd /home/gap/.gap/pkg/
+          git clone --depth 1 https://github.com/homalg-project/homalg_project.git
+          git clone --depth 1 https://github.com/homalg-project/CAP_project
+          git clone --depth 1 https://github.com/homalg-project/CategoryConstructor
+          git clone --depth 1 https://github.com/homalg-project/HigherHomologicalAlgebra
+          git clone --depth 1 https://github.com/homalg-project/Toposes
+          git clone --depth 1 https://github.com/homalg-project/FinSetsForCAP
+          git clone --depth 1 https://github.com/homalg-project/QPA2
+          git clone --depth 1 https://github.com/homalg-project/Algebroids
+          git clone --depth 1 https://github.com/homalg-project/FunctorCategories
+          git clone --depth 1 https://github.com/homalg-project/SubcategoriesForCAP
+          cd CatReps
+          TERM=dumb make -j $(nproc) --output-sync ci-test
+          curl -s https://codecov.io/bash | bash
diff --git a/PackageInfo.g b/PackageInfo.g
index 6edd93c..d561f58 100644
--- a/PackageInfo.g
+++ b/PackageInfo.g
@@ -11,7 +11,7 @@ SetPackageInfo( rec(
 PackageName := "CatReps",
 Subtitle := "Representations and cohomology of finite categories",
 Version := Maximum( [
-                   "2020.05.14", ## Mohamed's version
+                   "2020.05.15", ## Mohamed's version
                    ## this line prevents merge conflicts
                    "2020.01.01", ## Tibor's version
                    ## this line prevents merge conflicts
diff --git a/README.md b/README.md
index 33e317a..fd7da31 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 | **Documentation**                                                 | **Build Status**                                                                                |
 |:-----------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------:|
-| [![][docs-stable-img]][docs-stable-url]                           | [![][circle-ci-img]][circle-ci-url] [![][codecov-img]][codecov-url] |
+| [![][docs-stable-img]][docs-stable-url]                           | [![][tests-img]][tests-url] [![][codecov-img]][codecov-url] |
 
 The package `CatReps` constructs the category of finite dimensional k-linear representations of a finite (concrete) category.
 The supported categorical doctrine is "symmetric monoidal Abelian category with enough projectives and (possibly incomplete) direct sum decomposition".
@@ -19,8 +19,8 @@ Future versions of `CatReps` will rely on [`reps`](https://www-users.math.umn.ed
 [docs-stable-img]: https://img.shields.io/badge/docs-stable-blue.svg
 [docs-stable-url]: https://homalg-project.github.io/CatReps/doc/chap0.html
 
-[circle-ci-img]: https://circleci.com/gh/homalg-project/CatReps.svg?branch=master
-[circle-ci-url]: https://circleci.com/gh/homalg-project/CatReps
+[tests-img]: https://github.com/homalg-project/CatReps/workflows/Tests/badge.svg
+[tests-url]: https://github.com/homalg-project/CatReps/
 
 [codecov-img]: https://codecov.io/gh/homalg-project/CatReps/branch/master/graph/badge.svg
 [codecov-url]: https://codecov.io/gh/homalg-project/CatReps
diff --git a/release b/release
index 5b9db5d..607f785 100755
--- a/release
+++ b/release
@@ -284,7 +284,8 @@ git archive --prefix=$BASENAME/ $TAG . | tar xf - -C "$TMP_DIR/"
 cd "$TMP_DIR/$BASENAME"
 
 notice "Removing unnecessary files"
-rm -f .git* .hg* .cvs*
+rm -rf .github .circleci
+rm -f .git* .hg* .cvs* .codecov*
 
 if [ -x autogen.sh ] ; then
     notice "Generating build system files"