freeCodeCamp/guide/english/certifications/information-security-and-quality-assurance/quality-assurance-and-testing-with-chai/use-assert.isok-and-assert.isnotok/index.md

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title: Use Assert.isOK and Assert.isNotOK
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# Use Assert.isOK and Assert.isNotOK

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## Problem Explanation
To begin, locate the file "tests/1_unit_tests.js".

This file contains multiple suites of tests for the project, and this challenge requires you to make the tests in ``` /** 3 */``` pass.


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## Hints

### Hint 1

The lines in the test should be changed from `assert.fail()` to either `assert.isOk()` or `assert.isNotOk()`.


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## Solutions

<details><summary>Solution 1 (Click to Show/Hide)</summary>

```js
/** 3 - Use assert.isOk() or assert.isNotOk() to make the tests pass. **/
// .isOk(truthy) and .isNotOk(falsey) will pass
test('#isOk, #isNotOk', function() {
  assert.isNotOk(null, 'null is falsey');
  assert.isOk("I'm truthy", 'a string is truthy');
  assert.isOk(true, 'true is truthy');
});
```
</details>