---
url: /docs/guide/usage/linter/rules/vitest/prefer-to-be-truthy.md
---

### What it does

This rule warns when `toBe(true)` is used with `expect` or `expectTypeOf`.
With `--fix`, it will be replaced with `toBeTruthy()`.

### Why is this bad?

Using `toBe(true)` is less flexible and may not account for other truthy
values like non-empty strings or objects. `toBeTruthy()` checks for any
truthy value, which makes the tests more comprehensive and robust.

### Examples

Examples of **incorrect** code for this rule:

```javascript
expect(foo).toBe(true);
expectTypeOf(foo).toBe(true);
```

Examples of **correct** code for this rule:

```javascript
expect(foo).toBeTruthy();
expectTypeOf(foo).toBeTruthy();
```

## How to use

## Version

This rule was added in v0.7.1.

## References