This release introduces a standalone fixture mode for starting fixtures without running tests, adds a built-in docker-compose fixture with structured options, and provides shared container runtime helpers for writing custom fixtures.
🚀 Features
Section titled “🚀 Features”Shared container runtime helpers for fixtures
Section titled “Shared container runtime helpers for fixtures”Feb 15, 2026 · @mavam, @codex · #22
Writing container-based fixtures no longer requires duplicating boilerplate for runtime detection, process management, and readiness polling.
The new container_runtime module provides reusable building blocks that handle
the common plumbing: detecting whether Docker or Podman is available, launching
containers in detached mode, polling for service readiness, and tearing down
cleanly. Custom fixtures can import these helpers and focus on their
service-specific logic instead.
The built-in docker-compose fixture and the example project now use these
shared helpers internally.
Native docker-compose fixture with structured options
Section titled “Native docker-compose fixture with structured options”Adds a built-in docker-compose fixture that starts and tears down Docker Compose services from structured fixture options.
The fixture validates Docker Compose availability, waits for service readiness (health-check first, running-state fallback), and exports deterministic service environment variables (including host-published ports).
Standalone fixture mode with —fixture CLI option
Section titled “Standalone fixture mode with —fixture CLI option”Feb 14, 2026 · @mavam, @claude · #20
You can now start fixtures in foreground mode without running any tests by using the --fixture option. This lets you provision services (like a database or message broker) and use them in your workflow.
Specify fixture names or YAML-style configuration:
uvx tenzir-test --fixture mysqluvx tenzir-test --fixture 'kafka: {port: 9092}' --debugThe harness prints fixture-provided environment variables like HOST, PORT, and DATABASE, then keeps services running until you press Ctrl+C. You can repeat --fixture to activate multiple fixtures. The option is mutually exclusive with positional TEST arguments.