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+---
+name: temporal-python-testing
+description: Test Temporal workflows with pytest, time-skipping, and mocking strategies. Covers unit testing, integration testing, replay testing, and local development setup. Use when implementing Temporal workflow tests or debugging test failures.
+---
+
+# Temporal Python Testing Strategies
+
+Comprehensive testing approaches for Temporal workflows using pytest, progressive disclosure resources for specific testing scenarios.
+
+## When to Use This Skill
+
+- **Unit testing workflows** - Fast tests with time-skipping
+- **Integration testing** - Workflows with mocked activities
+- **Replay testing** - Validate determinism against production histories
+- **Local development** - Set up Temporal server and pytest
+- **CI/CD integration** - Automated testing pipelines
+- **Coverage strategies** - Achieve ≥80% test coverage
+
+## Testing Philosophy
+
+**Recommended Approach** (Source: docs.temporal.io/develop/python/testing-suite):
+- Write majority as integration tests
+- Use pytest with async fixtures
+- Time-skipping enables fast feedback (month-long workflows → seconds)
+- Mock activities to isolate workflow logic
+- Validate determinism with replay testing
+
+**Three Test Types**:
+1. **Unit**: Workflows with time-skipping, activities with ActivityEnvironment
+2. **Integration**: Workers with mocked activities
+3. **End-to-end**: Full Temporal server with real activities (use sparingly)
+
+## Available Resources
+
+This skill provides detailed guidance through progressive disclosure. Load specific resources based on your testing needs:
+
+### Unit Testing Resources
+**File**: `resources/unit-testing.md`
+**When to load**: Testing individual workflows or activities in isolation
+**Contains**:
+- WorkflowEnvironment with time-skipping
+- ActivityEnvironment for activity testing
+- Fast execution of long-running workflows
+- Manual time advancement patterns
+- pytest fixtures and patterns
+
+### Integration Testing Resources
+**File**: `resources/integration-testing.md`
+**When to load**: Testing workflows with mocked external dependencies
+**Contains**:
+- Activity mocking strategies
+- Error injection patterns
+- Multi-activity workflow testing
+- Signal and query testing
+- Coverage strategies
+
+### Replay Testing Resources
+**File**: `resources/replay-testing.md`
+**When to load**: Validating determinism or deploying workflow changes
+**Contains**:
+- Determinism validation
+- Production history replay
+- CI/CD integration patterns
+- Version compatibility testing
+
+### Local Development Resources
+**File**: `resources/local-setup.md`
+**When to load**: Setting up development environment
+**Contains**:
+- Docker Compose configuration
+- pytest setup and configuration
+- Coverage tool integration
+- Development workflow
+
+## Quick Start Guide
+
+### Basic Workflow Test
+
+```python
+import pytest
+from temporalio.testing import WorkflowEnvironment
+from temporalio.worker import Worker
+
+@pytest.fixture
+async def workflow_env():
+    env = await WorkflowEnvironment.start_time_skipping()
+    yield env
+    await env.shutdown()
+
+@pytest.mark.asyncio
+async def test_workflow(workflow_env):
+    async with Worker(
+        workflow_env.client,
+        task_queue="test-queue",
+        workflows=[YourWorkflow],
+        activities=[your_activity],
+    ):
+        result = await workflow_env.client.execute_workflow(
+            YourWorkflow.run,
+            args,
+            id="test-wf-id",
+            task_queue="test-queue",
+        )
+        assert result == expected
+```
+
+### Basic Activity Test
+
+```python
+from temporalio.testing import ActivityEnvironment
+
+async def test_activity():
+    env = ActivityEnvironment()
+    result = await env.run(your_activity, "test-input")
+    assert result == expected_output
+```
+
+## Coverage Targets
+
+**Recommended Coverage** (Source: docs.temporal.io best practices):
+- **Workflows**: ≥80% logic coverage
+- **Activities**: ≥80% logic coverage
+- **Integration**: Critical paths with mocked activities
+- **Replay**: All workflow versions before deployment
+
+## Key Testing Principles
+
+1. **Time-Skipping** - Month-long workflows test in seconds
+2. **Mock Activities** - Isolate workflow logic from external dependencies
+3. **Replay Testing** - Validate determinism before deployment
+4. **High Coverage** - ≥80% target for production workflows
+5. **Fast Feedback** - Unit tests run in milliseconds
+
+## How to Use Resources
+
+**Load specific resource when needed**:
+- "Show me unit testing patterns" → Load `resources/unit-testing.md`
+- "How do I mock activities?" → Load `resources/integration-testing.md`
+- "Setup local Temporal server" → Load `resources/local-setup.md`
+- "Validate determinism" → Load `resources/replay-testing.md`
+
+## Additional References
+
+- Python SDK Testing: docs.temporal.io/develop/python/testing-suite
+- Testing Patterns: github.com/temporalio/temporal/blob/main/docs/development/testing.md
+- Python Samples: github.com/temporalio/samples-python