Getting a stack trace from SBT with Scala

Context: Writing Scala unit-tests in a project managed by SBT.

When I execute sbt test to run my unit-tests an assert fails somewhere in my code, I get something like the following (and nothing more)开发者_开发百科:

Test com.reach.ml.test.TestLSHEasy.T0 failed: assertion failed

This tells me which unit-test caused the assert fail, but not which assert it was. If I run the same test directly (not using sbt), I get a whole stack trace, which is very useful for debugging. So my question: How do I get SBT to print out the stack trace when a test crashes?

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Regarding xsbt, it might be related to the util.log.StackTrace object which can trim its output.
The issue 118 illustrated the will of keeping stack traces should be under better control:

so you shouldn't see that trace by default.

Maybe you can wrap your unit test, intercepting any exception, and printing explicitely their full stack trace? (as in Basic.scala or Boot.scala).