MSTest failures are not being reported. The output from the build looks like this:
[ncover] Starting execution...
[ncover] Process 'QTAgent' [PID 2424] has begun profiling.
[ncover]
[ncover] Results Top Level Tests
[ncover] ------- ---------------
[ncover] Error LindbergCorp.StringFileTranslator.Test.TranslatorTests.TestConversion
[ncover] Error LindbergCorp.StringFileTranslator.Test.TranslatorTests.TestConversionFrench
[ncover] Error LindbergCorp.StringFileTranslator.Test.TranslatorTests.TestFileNotFound
[ncover] Process 'QTAgent' [PID 2424] has finished profiling.
[ncover] 0/3 test(s) Passed, 3 Error
[ncover]
[ncover] Summary
[ncover] -------
[ncover] Test Run Error.
[ncover] Error 3
[ncover] --------
[ncover] Total 3
[ncover] Results file: E:\Jenkins\workspace\LindbergCorp.StringFileTranslator\TestResults\Release\test.results.trx

But the plugin reports all tests are successful