diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..e7a3af16
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+          cache: pip
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install .[app,test]
+
+      - name: Verify test package import
+        run: python -c "import btcopilot.tests; print(btcopilot.tests)"
+
+      - name: Run unit tests
+        run: pytest -svv --disable-warnings --pyargs btcopilot.tests
diff --git a/btcopilot/tests/personal/test_claude_backend.py b/btcopilot/tests/personal/test_claude_backend.py
index 8b9fd18d..3c6ed6c0 100644
--- a/btcopilot/tests/personal/test_claude_backend.py
+++ b/btcopilot/tests/personal/test_claude_backend.py
@@ -94,6 +94,7 @@ async def test_claude_text_with_turns():
     with patch("btcopilot.llmutil._anthropic_client") as mock_client_fn:
         mock_client = MagicMock()
         mock_client.messages.create = mock_create
+        mock_client.close = AsyncMock()
         mock_client_fn.return_value = mock_client
 
         result = await claude_text(
@@ -119,6 +120,7 @@ async def test_claude_text_with_simple_prompt():
     with patch("btcopilot.llmutil._anthropic_client") as mock_client_fn:
         mock_client = MagicMock()
         mock_client.messages.create = mock_create
+        mock_client.close = AsyncMock()
         mock_client_fn.return_value = mock_client
 
         result = await claude_text(prompt="What is 2+2?")
@@ -136,6 +138,7 @@ def test_claude_text_sync():
     with patch("btcopilot.llmutil._anthropic_client") as mock_client_fn:
         mock_client = MagicMock()
         mock_client.messages.create = mock_create
+        mock_client.close = AsyncMock()
         mock_client_fn.return_value = mock_client
 
         result = claude_text_sync(prompt="Hello")
diff --git a/btcopilot/tests/schema/test_validation.py b/btcopilot/tests/schema/test_validation.py
index 0f9fe642..f05f7a81 100644
--- a/btcopilot/tests/schema/test_validation.py
+++ b/btcopilot/tests/schema/test_validation.py
@@ -232,7 +232,7 @@ def test_validate_deltas_allows_offspring_without_spouse():
         deltas = PDPDeltas(
             events=[
                 Event(
-                    id=-1, kind=kind, person=1, child=1, spouse=None, description="x", dateTime="2025-01-01"
+                    id=-1, kind=kind, person=1, child=2, spouse=None, description="x", dateTime="2025-01-01"
                 )
             ]
         )