diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..bb7e94e
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,41 @@
+# Based on https://github.com/marketplace/actions/python-poetry-action
+
+name: Run tests
+
+on:
+  - push
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python 3.9
+      uses: actions/setup-python@v3
+      with:
+        python-version: "3.9"
+
+    - name: Install poetry
+      uses: abatilo/actions-poetry@v4
+
+    - name: Setup a local virtual environment (if no poetry.toml file)
+      run: |
+        poetry config virtualenvs.create true --local
+        poetry config virtualenvs.in-project true --local
+
+    - uses: actions/cache@v3
+      name: Define a cache for the virtual environment based on the lock file
+      with:
+        path: ./.venv
+        key: venv-${{ hashFiles('poetry.lock') }}
+
+    - name: Install dependencies
+      run: poetry install
+
+    - name: Run tests
+      run: poetry run pytest -vv
diff --git a/tests/armis_sdk/entities/sites_test.py b/tests/armis_sdk/entities/sites_test.py
index e0c7eec..2d36d72 100644
--- a/tests/armis_sdk/entities/sites_test.py
+++ b/tests/armis_sdk/entities/sites_test.py
@@ -58,7 +58,7 @@ async def test_get_sites(from_response, expected, httpx_mock: pytest_httpx.HTTPX
 async def test_get_sites_with_multiple_pages(
     monkeypatch, httpx_mock: pytest_httpx.HTTPXMock
 ):
-    monkeypatch.setenv("ARMIS_PAGE_SIZE", 2)
+    monkeypatch.setenv("ARMIS_PAGE_SIZE", "2")
     httpx_mock.add_response(
         url="https://mock_tenant.armis.com/api/v1/sites/?from=0&length=2",
         method="GET",