We currently run all of the integration tests under the address sanitizer. However, only a handful of tests (though some of the most important) run under the leak detector. On master, as of today, only the following suites have leak detection enabled:

compile
dbtest[_WT]
jsCore[_WT]
jsCore_compatibility[_WT]
jsCore_small_oplog[_WT]
jsCore_small_oplog_rs[_WT]

We should enable leak detection for the other suites.