diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..d24301b
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,52 @@
+stages:
+  - unit-test
+
+.untit_test_template:
+  stage: unit-test
+  script:
+    - apt update && apt install -y git
+    - julia --project=. -e 'import Pkg; Pkg.instantiate()'
+    - julia --project=. -e 'import Pkg; Pkg.test(; coverage = true)'
+  interruptible: true
+  tags:
+    - cpuonly
+
+unit_tests_releases:
+  extends: .untit_test_template
+  parallel:
+    matrix:
+      - JULIA_VERSION: ["1.6", "1.7", "1.8", "1.9", "1.10"]
+  image: julia:$JULIA_VERSION
+
+unit_tests_nightly:
+  extends: .untit_test_template
+  # use the same baseimage like the official julia images
+  image: debian:bookworm-slim
+  variables:
+    # path where julia tar bal should be downloaded
+    JULIA_DONWLOAD: /julia/download
+    # path where julia should be extracted
+    JULIA_EXTRACT: /julia/extract
+  before_script:
+    - apt update && apt install -y wget
+    - mkdir -p $JULIA_DONWLOAD
+    - mkdir -p $JULIA_EXTRACT
+    - >
+      if [[ $CI_RUNNER_EXECUTABLE_ARCH == "linux/arm64" ]]; then
+        wget https://julialangnightlies-s3.julialang.org/bin/linux/aarch64/julia-latest-linux-aarch64.tar.gz -O $JULIA_DONWLOAD/julia-nightly.tar.gz
+      elif [[ $CI_RUNNER_EXECUTABLE_ARCH == "linux/amd64" ]]; then
+        wget https://julialangnightlies-s3.julialang.org/bin/linux/x86_64/julia-latest-linux-x86_64.tar.gz -O $JULIA_DONWLOAD/julia-nightly.tar.gz
+      else
+        echo "unknown runner architecture -> $CI_RUNNER_EXECUTABLE_ARCH"
+        exit 1
+      fi
+    - tar -xf $JULIA_DONWLOAD/julia-nightly.tar.gz -C $JULIA_EXTRACT
+    # we need to search for the julia base folder name, because the second part of the name is the git commit hash
+    # e.g. julia-b0c6781676f
+    - JULIA_EXTRACT_FOLDER=${JULIA_EXTRACT}/$(ls $JULIA_EXTRACT | grep -m1 julia)
+    # copy everything to /usr to make julia public available
+    # mv is not possible, because it cannot merge folder
+    - cp -r $JULIA_EXTRACT_FOLDER/* /usr
+  allow_failure: true
+  tags:
+    - cpuonly
diff --git a/src/QEDcore.jl b/src/QEDcore.jl
index c2f5cc7..e44697d 100644
--- a/src/QEDcore.jl
+++ b/src/QEDcore.jl
@@ -2,4 +2,8 @@ module QEDcore
 
 # Write your package code here.
 
+function greet(x)
+    return "Hello $x"
+end
+
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index 2290068..cf60087 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,5 +2,7 @@ using QEDcore
 using Test
 
 @testset "QEDcore.jl" begin
-    # Write your tests here.
+    @testset "dummy" begin
+        @test QEDcore.greet("World!") == "Hello World!"
+    end
 end