diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..0c85d0e
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+++ b/.github/workflows/tests.yml
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+# this workflow runs unit tests and checks code style
+# for different versions of python on different operating systems
+
+name: tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  tests:
+    runs-on: ${{ matrix.config.os }}
+    name: ${{ matrix.config.os }} (${{ matrix.config.py }})
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - { os: ubuntu-latest, py: "3.12" }
+          - { os: ubuntu-latest, py: "3.11" }
+          - { os: windows-latest, py: "3.10" }
+          - { os: macOS-latest, py: "3.10" }
+          - { os: ubuntu-latest, py: "3.10" }
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.config.py }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.config.py }}
+
+      - name: Install poetry
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+
+      - name: Install package
+        run: poetry install
+
+      - name: Test with pytest
+        run: poetry run pytest tests/ --cov=bblocks_data_importers --cov-report=xml
+
+      - name: Use Codecov to track coverage
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml   # coverage report
+          fail_ci_if_error: true
+          verbose: true
+
+      - name: Check code style
+        run: poetry run black src tests --check
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