> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.ada.cx/2026-09-10-simulations-by-change-set/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.ada.cx/_mcp/server.

# Run Simulations against change sets in the dashboard

**Simulations** now lets you choose an environment before running test cases. Select **Production** or a change set with a **Testing** status. The dashboard shows the latest result for each test case. See [Run Simulations](/docs/optimization/testing/simulations#run-simulations) to test changes before publishing them.

The `GET /v2/simulations/test-runs/` API endpoint and MCP [`get_test_runs`](/mcp/tools/get-test-runs) tool now return the latest run per test case and change set, including live runs. Previously, they returned one latest result per test case across all environments. Results can now include several runs for the same test case. Use `changeset_ids` to filter by environment.

With Ada CLI, `testing runs list` also includes live and change set runs by default. Use `--changesets baseline` to show only live runs.