One test has failed, but CI for Github Actions has been successful

[tsh-hashimoto]

Hello.

I submited PR #113 yesterday.
It seems that all tests have been successful.

But, in the log, it indicated that one test has failed.

## ----------------------------------------------------- ##
## Open COBOL ESQL 4J 1.1.1 test suite: cobol data test. ##
## ----------------------------------------------------- ##
  1: numeric_signed_v                                ok
  2: numeric_v                                       ok
  3: comp3                                           ok
  4: comp3_signed                                    ok
  5: alphanumeric                                    ok
  6: japanese                                        ok
  7: varying                                         FAILED (varying.at:195)

## ------------- ##
## Test results. ##
## ------------- ##
ERROR: All 7 tests were run,

1 failed unexpectedly.

I checked the some jobs that had been run in the past, found the test failures (but CI was successful)

Is it a problem that the test is failing but the CI is succeeding?