diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..3636711
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,34 @@
+name: ci
+
+on:
+  pull_request:
+  push:
+    branches:
+      - refactor_tests
+
+env:
+  API_KEY: ${{ secrets.ApiKey }}
+
+concurrency:
+  # Cancels pending runs when a PR gets updated.
+  group: ${{ github.head_ref || github.run_id }}-${{ github.actor }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r requirements_dev.txt
+      - name: Run pytest
+        run: pytest
diff --git a/requirements_dev.txt b/requirements_dev.txt
new file mode 100644
index 0000000..449fb2c
--- /dev/null
+++ b/requirements_dev.txt
@@ -0,0 +1,3 @@
+-r requirements.txt
+pytest>=7.1.2
+python-dotenv>=0.20.0
\ No newline at end of file
diff --git a/tests/test_pandas.py b/tests/test_pandas.py
index 43f9073..239ad4b 100644
--- a/tests/test_pandas.py
+++ b/tests/test_pandas.py
@@ -105,7 +105,7 @@ def test_crossborder_queries(
 def test_query_offered_capacity(client, country_code_from, country_code_to, start, end):
     contract_marketagreement_type = "A01"
     result = client.query_offered_capacity(
-        country_code_from, country_code_to, start, end, contract_marketagreement_type, implicit=True
+        country_code_from, country_code_to, contract_marketagreement_type, start=start, end=end, implicit=True
     )
     assert not result.empty