diff --git a/.github/workflows/pytest-unit-testing.yml b/.github/workflows/pytest-unit-testing.yml
new file mode 100644
index 00000000..0ae4b66e
--- /dev/null
+++ b/.github/workflows/pytest-unit-testing.yml
@@ -0,0 +1,34 @@
+name: Unit testing
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  run-tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version:
+          - "3.10"
+          - "3.11"
+          - "3.12"
+
+    name:
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependecies
+        run: python -m pip install pytest firebase-admin scikit-learn pandas numpy
+
+      - name: Run tests
+        run: pytest
diff --git a/app/tests/__init__.py b/app/tests/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/app/tests/test_database.py b/app/tests/test_database.py
new file mode 100644
index 00000000..7bc93bd5
--- /dev/null
+++ b/app/tests/test_database.py
@@ -0,0 +1,54 @@
+from unittest.mock import patch, MagicMock
+from services.database import create_document, get_documents, get_document, delete_document, update_document
+
+
+@patch('services.database.firestore.client')
+def test_create_document(mock_firestore_client):
+    mock_db = MagicMock()
+    mock_firestore_client.return_value = mock_db
+    collection, doc_id, data = 'test_collection', 'test_doc_id', {
+        'field': 'value'}
+    result = create_document(collection, doc_id, data)
+    mock_db.collection().document().set.assert_called_with(data)
+    assert result == mock_db.collection().document().set.return_value
+
+
+@patch('services.database.firestore.client')
+def test_get_documents(mock_firestore_client):
+    mock_db = MagicMock()
+    mock_firestore_client.return_value = mock_db
+    collection, field, op, value = 'test_collection', 'field', '==', 'value'
+    result = get_documents(collection, field, op, value)
+    mock_db.collection().where().stream.assert_called_once()
+    assert result == mock_db.collection().where().stream.return_value
+
+
+@patch('services.database.firestore.client')
+def test_get_document(mock_firestore_client):
+    mock_db = MagicMock()
+    mock_firestore_client.return_value = mock_db
+    collection, doc_id = 'test_collection', 'test_doc_id'
+    result = get_document(collection, doc_id)
+    mock_db.collection().document().get.assert_called_once()
+    assert result == mock_db.collection().document().get.return_value
+
+
+@patch('services.database.firestore.client')
+def test_delete_document(mock_firestore_client):
+    mock_db = MagicMock()
+    mock_firestore_client.return_value = mock_db
+    collection, doc_id = 'test_collection', 'test_doc_id'
+    result = delete_document(collection, doc_id)
+    mock_db.collection().document().delete.assert_called_once()
+    assert result == mock_db.collection().document().delete.return_value
+
+
+@patch('services.database.firestore.client')
+def test_update_document(mock_firestore_client):
+    mock_db = MagicMock()
+    mock_firestore_client.return_value = mock_db
+    collection, doc_id, data = 'test_collection', 'test_doc_id', {
+        'field': 'new_value'}
+    result = update_document(collection, doc_id, data)
+    mock_db.collection().document().update.assert_called_with(data)
+    assert result == mock_db.collection().document().update.return_value