/BulkOperation/OP_MSG/max_msg_size fails:
[2017/09/12 22:26:48.930] + make -o test-libmongoc test TEST_ARGS=--no-fork -d -F test-results.json [2017/09/12 22:26:48.930] FAIL [2017/09/12 22:26:48.930] Assert Failure: 2 == 1 [2017/09/12 22:26:48.930] tests/test-mongoc-bulk.c:3441 test_bulk_max_msg_size()
The assert is checking that ONE message was sent, but evidently two messages are sent instead.