require-vitest-slow-test-threshold

Require explicit test.slowTestThreshold in committed Vitest config.

Rule catalog ID: R071

Targeted pattern scope

• test.slowTestThreshold

What this rule reports

This rule reports Vitest-oriented config when test.slowTestThreshold is omitted.

Why this rule exists

An explicit slow-test threshold keeps performance expectations stable and avoids drifting defaults across projects.

❌ Incorrect

export default {
    test: {},
};

✅ Correct

export default {
    test: {
        slowTestThreshold: 250,
    },
};

Behavior and migration notes

• Applies to Vitest config files and Vite config files that define a test block.
• Static and computed values are both accepted; this rule checks presence, not value range.

ESLint flat config example

import vite from "@typpi/eslint-plugin-vite";

export default [vite.configs.vitest];

When not to use it

Disable if your project intentionally relies on Vitest defaults and does not need explicit slow-test policy.

Package documentation

• Vitest config reference

Further reading

• require-vitest-timeout-triplet
• no-zero-vitest-slow-test-threshold