diff --git a/.github/workflows/python-testing.yml b/.github/workflows/python-testing.yml
new file mode 100644
index 0000000..6843d42
--- /dev/null
+++ b/.github/workflows/python-testing.yml
@@ -0,0 +1,39 @@
+name: Python application
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: ["3.13"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install flake8 pytest coverage
+          pip install -r requirements.txt
+      - name: Lint with flake8
+        run: |
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+      - name: DIMO Api test
+        run: |
+          PYTHONPATH=$(pwd) coverage run -m pytest -v && coverage xml -o coverage.xml
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_dimo.py b/tests/test_dimo.py
new file mode 100644
index 0000000..282ab2f
--- /dev/null
+++ b/tests/test_dimo.py
@@ -0,0 +1,60 @@
+from unittest.mock import MagicMock
+
+from dimo.dimo import DIMO
+
+
+def test_get_full_path_no_params():
+    client = DIMO(env="Dev")
+    result = client._get_full_path("Valuations", "/v2/vehicles/1234/valuations")
+    assert result == "https://valuations-api.dev.dimo.zone/v2/vehicles/1234/valuations"
+
+
+def test_get_full_path_with_params():
+    client = DIMO(env="Dev")
+    result = client._get_full_path(
+        "Telemetry",
+        "/items/:item_id",
+        {"item_id": 123, "detail_id": "abc"},
+    )
+    assert result == "https://telemetry-api.dev.dimo.zone/query/items/123"
+
+
+def test_get_auth_headers():
+    client = DIMO(env="Dev")
+    headers = client._get_auth_headers("token123")
+    assert headers == {
+        "Authorization": "Bearer token123",
+        "Content-Type": "application/json",
+    }
+
+
+def test_query_calls_request_with_correct_payload(monkeypatch):
+    client = DIMO(env="Dev")
+    # Create a fake request method on the client
+    fake_request = MagicMock(return_value={"data": {"result": True}})
+    monkeypatch.setattr(client, "request", fake_request)
+
+    query_str = "query { test }"
+    variables = {"key": "value"}
+    result = client.query("Trips", query_str, variables=variables, token="mocked_token")
+
+    # Verify the fake request was invoked once
+    fake_request.assert_called_once()
+    # Inspect call arguments
+    args, kwargs = fake_request.call_args
+    assert args[0] == "POST"
+    assert args[1] == "Trips"
+    assert args[2] == ""
+
+    # Assert correct headers
+    headers = kwargs["headers"]
+    assert headers["Authorization"] == "Bearer mocked_token"
+    assert headers["Content-Type"] == "application/json"
+    assert headers["User-Agent"] == "dimo-python-sdk"
+
+    # Check payload data
+    data = kwargs["data"]
+    assert data["query"] == query_str
+    assert data["variables"] == variables
+
+    assert result == {"data": {"result": True}}
diff --git a/tests/test_errors.py b/tests/test_errors.py
new file mode 100644
index 0000000..290ef05
--- /dev/null
+++ b/tests/test_errors.py
@@ -0,0 +1,33 @@
+import pytest
+from dimo.errors import DimoTypeError, check_type, check_optional_type
+
+
+def test_check_type_passes_for_correct_type():
+    # call check_type with valid args which should not raise anything
+    check_type("count", 5, int)
+
+
+def test_check_type_raises_for_incorrect_type():
+    with pytest.raises(DimoTypeError) as exc:
+        check_type("name", 123, str)
+    err = exc.value
+    assert err.param_name == "name"
+    assert err.expected_type is str
+    assert isinstance(err.actual_value, int)
+
+    assert "name must be a str" in str(err)
+    assert "but was entered as type int" in str(err)
+
+
+def test_check_optional_type_allows_none():
+    # None is allowed
+    check_optional_type("maybe", None, dict)
+
+
+def test_check_optional_type_raises_for_wrong_non_none():
+    with pytest.raises(DimoTypeError) as exc:
+        check_optional_type("maybe", 3.14, str)
+    err = exc.value
+    assert err.param_name == "maybe"
+    assert err.expected_type is str
+    assert isinstance(err.actual_value, float)
diff --git a/tests/test_permission_decoder.py b/tests/test_permission_decoder.py
new file mode 100644
index 0000000..2576b01
--- /dev/null
+++ b/tests/test_permission_decoder.py
@@ -0,0 +1,13 @@
+from dimo.permission_decoder import PermissionDecoder
+
+
+def test_dimo_client_hex_to_permissions():
+    permissions_hex = "0x3ffc"
+    permissions_list = PermissionDecoder.decode_permission_bits(permissions_hex)
+    assert permissions_list == [1, 2, 3, 4, 5, 6]
+
+    one_to_five_hex = "0xffc"
+    assert PermissionDecoder.decode_permission_bits(one_to_five_hex) == [1, 2, 3, 4, 5]
+
+    another_hex = "0x3fcc"
+    assert PermissionDecoder.decode_permission_bits(another_hex) == [1, 3, 4, 5, 6]