vstest: running netcoreapp2.0 test in container: Could not find testhost.dll

I am trying to run a netcoreapp2.0 xunit project. I have installed the 2.0.0-preview1-005783 cli.

I create a dotnet new xunit project and adjust the NuGet.Config file and csproj file to use the 15.1.0-preview-20170414-10 Sdk.

When I run this on a RHEL7 machine, tests are discovered. When I run this in a RHEL7 container, I get a message:

Could not find testhost.dll for source ‘/tmp/test/bin/Debug/netcoreapp2.0/test1.dll’. Make sure test project has a nuget reference of package “microsoft.testplatform.testhost”.

In the container, the restore completes successfully and contained this line:

  Installing Microsoft.TestPlatform.TestHost 15.1.0-preview-20170414-10.

When I manually start the vstest.console in the container and set the logging verbosity to normal the error message changes:

$ dotnet exec /opt/dotnet/sdk/2.0.0-preview1-005783/vstest.console.dll --framework:.NETCoreApp,Version=v2.0 --logger:console;verbosity=normal  /tmp/testapp/bin/Debug/netcoreapp2.0/testapp.dll

No test source files were specified.

dotnet info:

$ dotnet --info
.NET Command Line Tools (2.0.0-preview1-005783)

Product Information:
 Version:            2.0.0-preview1-005783
 Commit SHA-1 hash:  8bd15c7ec0

Runtime Environment:
 OS Name:     rhel
 OS Version:  7
 OS Platform: Linux
 RID:         rhel.7-x64
 Base Path:   /opt/dotnet/sdk/2.0.0-preview1-005783/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.0-preview1-001961-00
  Build    : 884c69a4ac461a5e1fad31f60f2e01871371c288

cc @smadala