If I have the following (truncated) Jamfile:

test-suite spirit_v2/karma :

     [ compile-fail karma/grammar_fail.cpp         : : karma_grammar_fail ]
     [ compile-fail karma/rule_fail.cpp            : : karma_rule_fail ]

How do I run just karma_rule_fail test, and not karma_grammar_fail? The following don't seem to work "b2 spirit_v2/karma/karma_rule_
fail", or "b2 karma_rule_fail". It is possible to run just a single test case in the suite, or is the suite the lowest-level target that can be executed?