> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.tester.army/run/llms.txt.
> For full documentation content, see https://docs.tester.army/run/llms-full.txt.

# Run Mode

Run Mode controls whether tests in a group execute at the same time or one after another. By default, groups run concurrently.

## Concurrent (default)

All tests start simultaneously. Each test runs independently with no ordering guarantee. Best for groups where tests do not share state or depend on each other.

## Sequential

Tests run one at a time, in the order shown in the group. The next test starts only after the previous one finishes. Best when tests share state, depend on each other, or target a shared environment that cannot handle parallel sessions.

## Set up Run Mode

1. Open **Project → Tests** tab.
2. Click the **Configure Trigger** button on the group you want to configure.
3. In the **Run Mode** section at the top of the panel, pick **Concurrent** or
   **Sequential**.
4. Click **Save**.

Groups in Sequential mode get a small "Sequential" badge next to the group name
in the Tests tab. Concurrent is the default and shows no badge.

![Run Mode configuration](https://files.buildwithfern.com/testerarmy.docs.buildwithfern.com/599d416ea0dadfc88173dd67dced5830fa40a7e744285a36b5e96428d4a8f995/docs/assets/docs/run-mode.png)

## Reorder tests

When a group is set to Sequential, a drag handle appears next to each test. Drag tests to reorder them. Changes save instantly.