At the moment Bamboo only displays the <message> part of the <failure> but not the <stack-trace>.
Example:
<test-case name="Euphoria.ActiveDirectory.Tests.ComputerTests.EqualsTest" executed="True" result="Failure" success="False" time="1.156" asserts="1"> <categories> <category name="CI" /> </categories> <failure> <message><![CDATA[SetUp : System.UnauthorizedAccessException : Access is denied. TearDown : Expected: not null But was: null ]]></message> <stack-trace><![CDATA[at System.DirectoryServices.AccountManagement.ADStoreCtx.Insert(Principal p) at System.DirectoryServices.AccountManagement.Principal.Save() at Euphoria.ActiveDirectory.Computer.Save() in d:\Source\CastleBravo\Euphoria.ActiveDirectory\Computer.cs:line 841 at Euphoria.ActiveDirectory.Tests.ComputerTests.Init() in d:\Source\CastleBravo\Euphoria.ActiveDirectory.Tests\ComputerTests.cs:line 93 --TearDown at Euphoria.ActiveDirectory.Tests.ComputerTests.Teardown() in d:\Source\CastleBravo\Euphoria.ActiveDirectory.Tests\ComputerTests.cs:line 135 ]]></stack-trace> </failure> </test-case>
Documentation: https://github.com/nunit/docs/wiki/Test-Result-XML-Format#stack-trace