diff --git a/.codecov.yml b/.codecov.yml
new file mode 100644
index 00000000..083ec864
--- /dev/null
+++ b/.codecov.yml
@@ -0,0 +1,10 @@
+coverage:
+  range: 60..100
+  round: down
+  precision: 2
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 0.5%
+    #patch: off
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 00000000..00596d54
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,76 @@
+name: tests
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+env:
+  CACHE_NUMBER: 0  # increase to reset cache manually
+  PYTEST_FLAGS: --cov=stardis --cov-report=xml --cov-report=html
+  CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
+defaults:
+  run:
+    shell: bash -l {0}
+
+jobs:
+  build:
+    # if: github.repository_owner == 'tardis-sn'
+    strategy:
+      matrix:
+        include:
+
+        - os: ubuntu-latest
+          label: linux-64
+          prefix: /usr/share/miniconda3/envs/stardis
+
+        - os: macos-latest
+          label: osx-64
+          prefix: /Users/runner/miniconda3/envs/stardis
+    
+    name: ${{ matrix.label }}
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Mambaforge
+        uses: conda-incubator/setup-miniconda@v2
+        with:
+          miniforge-variant: Mambaforge
+          miniforge-version: latest
+          activate-environment: stardis
+          use-mamba: true
+
+
+      - name: Cache lockfile
+        uses: actions/cache@v2
+        with:
+          path: ${{ matrix.prefix }}
+          key: conda-${{ matrix.label }}-${{ hashFiles('conda-${{ matrix.label }}.lock') }}-${{ env.CACHE_NUMBER }}
+        id: cache-conda
+
+      - name: Update Conda Environment
+        id: update-env
+        run: |
+          wget -nv https://github.com/tardis-sn/tardis/releases/latest/download/conda-${{ matrix.label }}.lock -O conda-${{ matrix.label }}.lock
+          mamba update -n stardis --file conda-${{ matrix.label }}.lock
+        if: steps.cache-conda.outputs.cache-hit != 'true'
+
+      - name: Install TARDIS
+        id: install-tardis
+        run: |
+          pip install git+https://github.com/tardis-sn/tardis.git@release-2023.04.16
+
+      - name: Install STARDIS
+        id: install-stardis
+        # shell: bash -l {0}
+        run: |
+          python setup.py develop
+
+      - name: Run tests
+        run: pytest stardis ${{ env.PYTEST_FLAGS }}          
+
+      - name: Upload to Codecov
+        run: bash <(curl -s https://codecov.io/bash)
diff --git a/stardis/tests/test_example.py b/stardis/tests/test_example.py
index 1df24ab8..a61f164f 100644
--- a/stardis/tests/test_example.py
+++ b/stardis/tests/test_example.py
@@ -1,9 +1,3 @@
-def test_primes():
-    from ..example_mod import primes
-
-    assert primes(10) == [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
-
-
 def test_deprecation():
     import warnings