.NET builder tasks in Bamboo (e.g. NAnt) do not parse test information as part of the task. You must configure a test task (e.g. MSTest Parser), if you want test results from the builder task to be parsed.
To configure a NUnit Parser executable for a task:
Navigate to the task configuration for the job (this will be the default job if creating a new plan).
Click the name of the desired NUnit Parser task, or click Add Task and then NUnit Parser if creating a new task.
Update the task settings:
Task Description — Enter a description of the task, for display in Bamboo.
NUnit Test Results File/Directory — Enter the name of the test results file/directory. The test files must be in NUnit XML format. For more information on NUnit, see http://www.nunit.org/.