我有很多 Xamarin.Forms 应用程序的 uitests。这些测试在类别下。（例如 LoginTest 类别有 10 个测试，InboxTest 类别有 40 个测试等。）当我选择 1 个类别（或当我选择多个类别时）并在 iOS 模拟器上运行它时，首先运行这些类别的测试，但过一会儿有些测试不运行。
我遇到了这个错误：
Connection closed
Stack trace:
at MonoDevelop.Core.Execution.RemoteProcessConnection.SendMessage[RT] (MonoDevelop.Core.Execution.BinaryMessage`1[RT] message) [0x00024] in /Users/builder/azdo/_work/1/s/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Execution/RemoteProcessConnection.cs:374
at MonoDevelop.UnitTesting.NUnit.External.ExternalTestRunner.Run (MonoDevelop.UnitTesting.NUnit.External.IRemoteEventListener listener, System.String[] nameFilter, System.String path, System.String suiteName, System.Collections.Generic.List`1[T] supportAssemblies, System.String testRunnerType, System.String testRunnerAssembly, System.String crashLogFile) [0x00099] in /Users/builder/azdo/_work/1/s/main/src/addins/MonoDevelop.UnitTesting.NUnit/MonoDevelop.UnitTesting.NUnit/ExternalTestRunner.cs:91
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread () [0x001b6] in C:\A_work\107\s\src\Microsoft.VisualStudio.Threading\JoinableTask.cs:916
at Microsoft.VisualStudio.Threading.JoinableTask`1[T].CompleteOnCurrentThread () [0x00000] in C:\A_work\107\s\src\Microsoft.VisualStudio.Threading\JoinableTask`1.cs:84
at Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run[T] (System.Func`1[TResult] asyncMethod, Microsoft.VisualStudio.Threading.JoinableTaskCreationOptions creationOptions) [0x0000e] in C:\A_work\107\s\src\Microsoft.VisualStudio.Threading\JoinableTaskFactory.cs:505
at Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run[T] (System.Func`1[TResult] asyncMethod) [0x00000] in C:\A_work\107\s\src\Microsoft.VisualStudio.Threading\JoinableTaskFactory.cs:484
at MonoDevelop.UnitTesting.NUnit.NUnitAssemblyTestSuite.RunUnitTest (MonoDevelop.UnitTesting.UnitTest test, System.String suiteName, System.String pathName, System.String testName, MonoDevelop.UnitTesting.TestContext testContext) [0x00265] in /Users/builder/azdo/_work/1/s/main/src/addins/MonoDevelop.UnitTesting.NUnit/MonoDevelop.UnitTesting.NUnit/NUnitAssemblyTestSuite.cs:535
at MonoDevelop.UnitTesting.NUnit.NUnitTestSuite.OnRun (MonoDevelop.UnitTesting.TestContext testContext) [0x00000] in /Users/builder/azdo/_work/1/s/main/src/addins/MonoDevelop.UnitTesting.NUnit/MonoDevelop.UnitTesting.NUnit/NUnitTestSuite.cs:79
at MonoDevelop.UnitTesting.UnitTest.Run (MonoDevelop.UnitTesting.TestContext testContext) [0x0001c] in /Users/builder/azdo/_work/1/s/main/src/addins/MonoDevelop.UnitTesting/Services/UnitTest.cs:351
当我一个一个运行它时，它们运行。我的 Visual Studio mac 版本是 8.8.4（最新） Xamarin.TestCloud.Agent 版本是 0.22.1 Xamarin.UITest 版本是 3.0.12
我必须做什么？先感谢您。