099-scfilter testcase

Hi all：
Recently, when I was compiling chrony-4.1, I always found that the 099-scfilter use case failed.
The 099-scfilter case always fails. The failure log is as follows:

099-scfilter   Testing system call filter in non-destructive tests:
  level -1:
    001-minimal                                                 OK
    002-extended                                                OK
    003-memlock                                                 OK
    004-priority                                                OK
    006-privdrop                                                OK
    007-cmdmon                                                  BAD
FAIL

When I open the detailed log, the following information is displayed:


  running chronyc minstratum 127.0.0.1 1                        OK
  checking chronyc output                                       OK
  running chronyc polltarget 127.0.0.1 10                       OK
  checking chronyc output                                       OK
  running chronyc refresh                                       ERROR
FAIL
  stopping chronyd                                              ERROR
                                                BAD
FAIL

It seems that the chronyc refresh of 007-commands fails when the level is -1, but the 007-commands case itself is successful. I wonder whether this level affects the execution result of the test case.