dotnet test output missing in .NET Core 2.1.300 RC1

In .NET Core 2.1 RC1 SDK (2.1.300-rc1-008673), the reason that tests fail is not output to the console anymore. As well as being less useful to the developer, this also appears to break functionality like test output detection in TeamCity.

Steps to reproduce

1. Clone https://github.com/martincostello/missing-test-output-repo
2. Run dotnet test

Expected behavior

The reason for the test’s failure is output to the console (example below achieved by using 2.0.104 in global.json).

PS C:\Coding\missing-test-output-repo> dotnet test
Build started, please wait...
Build completed.

Test run for C:\Coding\missing-test-output-repo\XUnitTestProject1\bin\Debug\netcoreapp2.0\XUnitTestProject1.dll(.NETCoreApp,Version=v2.0)
Microsoft (R) Test Execution Command Line Tool Version 15.6.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...
[xUnit.net 00:00:00.4992229]   Discovering: XUnitTestProject1
[xUnit.net 00:00:00.5743060]   Discovered:  XUnitTestProject1
[xUnit.net 00:00:00.5810979]   Starting:    XUnitTestProject1
[xUnit.net 00:00:00.7636667]     XUnitTestProject1.UnitTest1.Bad_Math [FAIL]
[xUnit.net 00:00:00.7655042]       Assert.Equal() Failure
[xUnit.net 00:00:00.7656693]       Expected: 2
[xUnit.net 00:00:00.7657361]       Actual:   1
[xUnit.net 00:00:00.7671460]       Stack Trace:
[xUnit.net 00:00:00.7688282]         C:\Coding\missing-test-output-repo\XUnitTestProject1\UnitTest1.cs(17,0): at XUnitTe
stProject1.UnitTest1.Bad_Math()
[xUnit.net 00:00:00.7852434]   Finished:    XUnitTestProject1
Failed   XUnitTestProject1.UnitTest1.Bad_Math
Error Message:
 Assert.Equal() Failure
Expected: 2
Actual:   1
Stack Trace:
   at XUnitTestProject1.UnitTest1.Bad_Math() in C:\Coding\missing-test-output-repo\XUnitTestProject1\UnitTest1.cs:line 1
7

Total tests: 2. Passed: 1. Failed: 1. Skipped: 0.
Test Run Failed.
Test execution time: 1.8924 Seconds
PS C:\Coding\missing-test-output-repo>

Actual behavior

Reason for the test’s failure is not output, just that the test failed.

PS C:\Coding\missing-test-output-repo> dotnet test
Build started, please wait...
Build completed.

Test run for C:\Coding\missing-test-outputrepo\XUnitTestProject1\bin\Debug\netcoreapp2.0\XUnitTestProject1.dll(.NETCoreApp,Version=v2.0)
Microsoft (R) Test Execution Command Line Tool Version 15.7.0-preview-20180221-13
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...
[xUnit.net 00:00:00.7648657]     XUnitTestProject1.UnitTest1.Bad_Math [FAIL]

Total tests: 2. Passed: 1. Failed: 1. Skipped: 0.
Test Run Failed.
Test execution time: 1.9199 Seconds
PS C:\Coding\missing-test-output-repo>

Environment data

dotnet --info output:

PS C:\Coding\missing-test-output-repo> dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   2.1.300-rc1-008673
 Commit:    f5e3ddbe73

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.16299
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.1.300-rc1-008673\

Host (useful for support):
  Version: 2.1.0-rc1
  Commit:  eb9bc92051

.NET Core SDKs installed:
  1.0.0 [C:\Program Files\dotnet\sdk]
  1.0.1 [C:\Program Files\dotnet\sdk]
  1.0.2 [C:\Program Files\dotnet\sdk]
  1.0.3 [C:\Program Files\dotnet\sdk]
  1.0.4 [C:\Program Files\dotnet\sdk]
  1.1.0 [C:\Program Files\dotnet\sdk]
  2.0.0 [C:\Program Files\dotnet\sdk]
  2.0.2 [C:\Program Files\dotnet\sdk]
  2.0.3 [C:\Program Files\dotnet\sdk]
  2.1.2 [C:\Program Files\dotnet\sdk]
  2.1.3 [C:\Program Files\dotnet\sdk]
  2.1.4 [C:\Program Files\dotnet\sdk]
  2.1.100 [C:\Program Files\dotnet\sdk]
  2.1.101 [C:\Program Files\dotnet\sdk]
  2.1.102 [C:\Program Files\dotnet\sdk]
  2.1.103 [C:\Program Files\dotnet\sdk]
  2.1.104 [C:\Program Files\dotnet\sdk]
  2.1.200 [C:\Program Files\dotnet\sdk]
  2.1.300-preview1-008174 [C:\Program Files\dotnet\sdk]
  2.1.300-preview2-008530 [C:\Program Files\dotnet\sdk]
  2.1.300-rc1-008673 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.0-preview1-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.0-preview2-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.0-rc1-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.0-preview1-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.0-preview2-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.0-rc1-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 1.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.1.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.0-preview1-26216-03 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.0-preview2-26406-04 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.0-rc1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

[peterhuene]

Thanks for reporting this issue to us @martincostello! I’ve made a fix that will be in 2.1 RTM.

[martincostello]

So I finally got TeamCity results by using --verbosity=normal instead. Has the default been changed as part of 2.1.300 since preview 1, or is it that’s what was being used before and I just incorrectly interpreted the above as the workaround?