jstests/noPassthroughWithMongod/capped_truncate.js has been blacklisted for now, but fails with this message:
[js_test:capped_truncate] 2015-11-23T15:41:44.010-0500 assert: [5] != [10] are not equal : wrong number of entries in _id index after truncate [js_test:capped_truncate] 2015-11-23T15:41:44.011-0500 doassert@src/mongo/shell/assert.js:15:14 [js_test:capped_truncate] 2015-11-23T15:41:44.011-0500 assert.eq@src/mongo/shell/assert.js:49:5 [js_test:capped_truncate] 2015-11-23T15:41:44.011-0500 @jstests/noPassthroughWithMongod/capped_truncate.js:28:1 [js_test:capped_truncate] 2015-11-23T15:41:44.011-0500 @jstests/noPassthroughWithMongod/capped_truncate.js:7:2