diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..da860bc
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,42 @@
+name: Tests
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+        
+      - name: Cancel Previous Runs
+        uses: styfle/cancel-workflow-action@0.12.0
+        with:
+          access_token: ${{ github.token }}
+      
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      # depth 0 will download all the repository history
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      # Runs tests in a pharo image by removing the old code in the pharo image
+      - name: Run Pharo Tests
+        id: tests
+        uses: akevalion/PharoTestsAction@v1
+        with:
+          baseline: 'RTree'
+          group: 'default'
+          tests: 'RTree'
diff --git a/README.md b/README.md
index f060386..6458163 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # RTree
+[![CI](https://github.com/pharo-graphics/RTree/actions/workflows/tests.yml/badge.svg)](https://github.com/pharo-graphics/RTree/actions/workflows/tests.yml)
+
 RTree for graphic engines