Karma runner Karma Test Runner-一些测试用例被悄悄地跳过

我正在使用

karma

测试跑步者和

mocha

和

chai

进行单元测试。我有大约577个测试用例。当我们反复运行自动化时，大多数时候，所有测试用例都通过了，计数正确显示如下

[2020-10-14 05:28:42] DEBUG: [1A[2KFirefox 81.0 (Windows 10): Executed 576 of 577[32m SUCCESS[39m (0 secs / 6 mins 7.585 secs)
[2020-10-14 05:28:43] DEBUG: [1A[2KFirefox 81.0 (Windows 10): Executed 577 of 577[32m SUCCESS[39m (0 secs / 6 mins 7.725 secs)
[2020-10-14 05:28:43] DEBUG: [1A[2KFirefox 81.0 (Windows 10): Executed 577 of 577[32m SUCCESS[39m (10 mins 26.587 secs / 6 mins 7.725 secs)
[2020-10-14 05:28:43] DEBUG: [32mTOTAL: 577 SUCCESS[39m
[2020-10-14 05:28:43] DEBUG: BROWSER FirefoxHeadless COMPLETED
[2020-10-14 05:28:43] DEBUG: SUCCESS  577
[2020-10-14 05:28:43] DEBUG: FAILED  0
[2020-10-14 05:28:43] DEBUG: SKIPPED  0
[2020-10-14 05:28:43] DEBUG: TOTAL  577
[2020-10-14 05:28:43] DEBUG: ERROR  false
[2020-10-14 05:28:43] DEBUG: DISCONNECTED  false
[2020-10-14 05:28:43] DEBUG: TOTAL TIME  626587 ms

但有时会跳过一些计数并非始终不变的测试用例

[2020-10-14 05:26:34] DEBUG: [1A[2KFirefox 81.0 (Windows 10): Executed 562 of 577[32m SUCCESS[39m (0 secs / 5 mins 53.508 secs)
[2020-10-14 05:26:35] DEBUG: [1A[2KFirefox 81.0 (Windows 10): Executed 563 of 577[32m SUCCESS[39m (0 secs / 5 mins 53.624 secs)
[2020-10-14 05:26:35] DEBUG: [1A[2KFirefox 81.0 (Windows 10): Executed 563 of 577[32m SUCCESS[39m (10 mins 26.296 secs / 5 mins 53.624 secs)
[2020-10-14 05:26:35] DEBUG: [32mTOTAL: 563 SUCCESS[39m
[2020-10-14 05:26:35] DEBUG: BROWSER FirefoxHeadless COMPLETED
[2020-10-14 05:26:35] DEBUG: SUCCESS  563
[2020-10-14 05:26:35] DEBUG: FAILED  0
[2020-10-14 05:26:35] DEBUG: SKIPPED  0
[2020-10-14 05:26:35] DEBUG: TOTAL  577
[2020-10-14 05:26:35] DEBUG: ERROR  false
[2020-10-14 05:26:35] DEBUG: DISCONNECTED  false
[2020-10-14 05:26:35] DEBUG: TOTAL TIME  626296 ms

如果您看到这里，就没有失败的测试用例。我已经在同一组测试用例上并行运行了上述两个自动化。如何避免测试用例被悄悄跳过