xUnit test asp net core Mapper not initialized

I am testing this method that in the end does mapping to my DTO

public async Task<IActionResult> Get()
        {
            var currencies = await _repository.GetCurrencies().ToListAsync().ConfigureAwait(false);
            if (currencies.Count == 0)
                return NoContent();

            return Ok(currencies.ToDto());
        }

In return of this method I get the following error:

Message: System.InvalidOperationException : Mapper not initialized. Call Initialize with appropriate configuration. If you are trying to use mapper instances through a container or otherwise, make sure you do not have any calls to the static Mapper.Map methods, and if you're using ProjectTo or UseAsDataSource extension methods, make sure you pass in the appropriate IConfigurationProvider instance.

I use a static method to do auto mapper

public static List<CurrencyDTO> ToDto(this List<Currency> model)
        {
            return Mapper.Map<List<Currency>, List<CurrencyDTO>>(model);
        }

When I run only this test it passes but when I squeeze everyone it speaks

I tried already make a builder initialize mapper but continue error, test only passes if it is run individually

public class CurrenciesControllerTest
    {
        public CurrenciesControllerTest()
        {
            AutoMapperConfig.RegisterMappings();
        }
        private Mock<IReimbursementRepository> _repository = new Mock<IReimbursementRepository>();
        [Fact]
          public async Task Should_return_all_currencies()
        {
            var mock = Currencyfactory().AsQueryable().BuildMock();
            _repository.Setup(x => x.GetCurrencies()).Returns(mock.Object);

            var controller = new CurrenciesController(_repository.Object);
            var response = await controller.Get().ConfigureAwait(false) as OkObjectResult;`enter code here`

            Assert.Equal(response.StatusCode, (int)HttpStatusCode.OK);
        }
    }