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# 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://fdr-prod-docs-files-public.s3.us-east-1.amazonaws.com/testerarmy-subpath.docs.buildwithfern.com/599d416ea0dadfc88173dd67dced5830fa40a7e744285a36b5e96428d4a8f995/docs/assets/docs/run-mode.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6KXJSKKNFOCF7G4B%2F20260817%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260817T151623Z&X-Amz-Expires=604800&X-Amz-Signature=edd52368a7eb7812cd29cfabdcf6b9638e12d86893d4620ba5d131fc54b55383&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)

## 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.