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Code Inspection: NUnit. Async test method should return Task or Task<T>

Async test methods in NUnit 3.x must return either Task if no value is returned, or Task<T> if a value of type T is returned. Below are two situations where async tests will not be working correctly.

[Test] // Warning: Async test method is void public async void Test1() { // do something await Task.CompletedTask; } [Test] // Warning: NUnit 3.10 does not support ValueTask public async ValueTask<int> Test2() { // do something return await Task.FromResult(100); }

In both situations you need to rewrite test methods so that they return either Task or Task<T>.

Last modified: 08 March 2021