diff --git a/tests/test_application.py b/tests/test_application.py
new file mode 100644
index 0000000..c4f1ae0
--- /dev/null
+++ b/tests/test_application.py
@@ -0,0 +1,56 @@
+from unittest.mock import patch, MagicMock
+from pilgrim.application import Application
+
+@patch('pilgrim.application.UIApp')
+@patch('pilgrim.application.ServiceManager')
+@patch('pilgrim.application.Database')
+@patch('pilgrim.application.ConfigManager')
+def test_application_initialization_wires_dependencies(
+    MockConfigManager, MockDatabase, MockServiceManager, MockUIApp
+):
+    mock_config_instance = MockConfigManager.return_value
+    mock_db_instance = MockDatabase.return_value
+    mock_session_instance = mock_db_instance.session.return_value
+    mock_service_manager_instance = MockServiceManager.return_value
+    app = Application()
+    MockConfigManager.assert_called_once()
+    MockDatabase.assert_called_once_with(mock_config_instance)
+    MockServiceManager.assert_called_once()
+    MockUIApp.assert_called_once_with(mock_service_manager_instance, mock_config_instance)
+    mock_config_instance.read_config.assert_called_once()
+    mock_db_instance.session.assert_called_once()
+    mock_service_manager_instance.set_session.assert_called_once_with(mock_session_instance)
+
+@patch('pilgrim.application.UIApp')
+@patch('pilgrim.application.ServiceManager')
+@patch('pilgrim.application.Database')
+@patch('pilgrim.application.ConfigManager')
+def test_application_run_calls_methods(
+    MockConfigManager, MockDatabase, MockServiceManager, MockUIApp
+):
+    app = Application()
+    mock_db_instance = app.database
+    mock_ui_instance = app.ui
+    app.run()
+    mock_db_instance.create.assert_called_once()
+    mock_ui_instance.run.assert_called_once()
+
+@patch('pilgrim.application.UIApp')
+@patch('pilgrim.application.ServiceManager')
+@patch('pilgrim.application.Database')
+@patch('pilgrim.application.ConfigManager')
+def test_get_service_manager_creates_and_configures_new_instance(
+    MockConfigManager, MockDatabase, MockServiceManager, MockUIApp
+):
+    app = Application()
+    mock_db_instance = app.database
+    fake_session = MagicMock()
+    mock_db_instance.session.return_value = fake_session
+    mock_db_instance.reset_mock()
+    MockServiceManager.reset_mock()
+    returned_manager = app.get_service_manager()
+    mock_db_instance.session.assert_called_once()
+    MockServiceManager.assert_called_once()
+    returned_manager.set_session.assert_called_once_with(fake_session)
+
+    assert returned_manager is MockServiceManager.return_value
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