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# Suite(_:_:)

Declare a test suite.

```
@attached(peer) macro Suite(_ displayName: String? = nil, _ traits: any SuiteTrait...)
```

## Parameters

`displayName`

The customized display name of this test suite. If the
value of this argument is `nil`, the display name of the test is derived
from the associated type’s name.

`traits`

Zero or more traits to apply to this test suite.

## Overview

A test suite is a type that contains one or more test functions. Any type
may be a test suite.

The use of the `@Suite` attribute is optional; types are recognized as test
suites even if they do not have the `@Suite` attribute applied to them.

When adding test functions to a type extension, do not use the `@Suite`
attribute. Only a type’s primary declaration may have the `@Suite` attribute
applied to it.

## See Also

[Organizing test functions with suite types](/documentation/Testing/OrganizingTests)

Organize tests into test suites.


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