Unit testing not working, doesn't hit multiple test classes

using Microsoft.VisualStudio.TestTools.UnitTesting;
using VehicleInspection_Domain.Interfaces;
using Moq;
using Microsoft.AspNetCore.Mvc;
using VehicleInspection_Domain.Models.AbstractModels;
using Newtonsoft.Json;

namespace VehicleInspection_Test
{
    [TestClass]
    public class VehicleInspectionTesting
    {
        private readonly IEmailRepository _emailRepository;

        public VehicleInspectionTesting(IEmailRepository emailRepository)
        {
            _emailRepository = emailRepository;
        }

        [TestMethod]
        public async Task Insepction_ReturnOkResult_AndSendsEmailOnMajorDefect()
        {
            string jsonData = @"
            {
                *** SOME DATA ***
            }";

            // Mock dependencies
            var emailRepositoryMock = new Mock<IEmailRepository>();
            var inspectionService = new VehicleInspectionTesting(emailRepositoryMock.Object);

            // Act
            var result = await inspectionService.ProcessInspection(jsonData);

            // Assert
            Assert.IsInstanceOfType(result, typeof(OkResult));

            // Verify that SendCriticalDefectEmail was called when major defects exist
            emailRepositoryMock.Verify(x => x.SendCriticalDefectEmail(It.IsAny<string>(), It.IsAny<int>()), Times.Once);
        }
    }
}