def METHOD_NAME(self):
    cmd = "python gdb.execute(f'heap bins fast {gef.heap.main_arena.next:#x}')"
    before = ["set environment GLIBC_TUNABLES glibc.malloc.tcache_count=0"]
    target = _target("heap-non-main")
    res = gdb_run_silent_cmd(cmd, before=before, target=target)
    self.assertNoException(res)
    self.assertIn("size=0x20", res)