In case 16962 [1] the question was raised why after a successful CI validation you later get a failed validation. I experience this sometimes and guess others might interested in this too. If multi-threads are involved, sometimes the failure indicates a real problem due to a race condition that only occurs sometimes. Here you will see lots of tests passing and then a problem on a particular one. In this case I find running the suspect test or class from playground wrapped in a 1000 loop can expose the problem for debugging. In the case of 16962 [1], looking at a report for success [2] you can see "CIChangeCaseValidationRule" is followed by "Loading CASE 16962" and then a long listing of tests run, and only at the end the validation report. However the report for failure [3] shows CIChangeCaseValidationRule immediately followed by the validation report. So I wonder if that means the slice did not load - maybe due to some network error or smalltalkhub error. Now thats idle speculation, but maybe useful to consider if you encounter such a scenario. cheers -ben 2015-11-28 3:56 AM SUCCESS [2] [...] Starting validation of CASE 16962 http://smalltalkhub.com/mc/Pharo/Pharo50Inbox/main/SLICE-Issue-16962-Code-pa... Notice: Running a CIAndRule Notice: Running a CIChangeCaseValidationRule Notice: Loading CASE 16962 http://smalltalkhub.com/mc/Pharo/Pharo50Inbox/main/SLICE-Issue-16962-Code-pa... [...cut many,many lines of test cases...] ========================================================== Validation Report: CASE 16962 http://smalltalkhub.com/mc/Pharo/Pharo50Inbox/main/SLICE-Issue-16962-Code-pa... ========================================================== Validation Success: CASE 16962 http://smalltalkhub.com/mc/Pharo/Pharo50Inbox/main/SLICE-Issue-16962-Code-pa... [...] 2015-11-26 10:29 PM FAILURE [3] [...] Starting validation of CASE 16962 http://smalltalkhub.com/mc/Pharo/Pharo50Inbox/main/SLICE-Issue-16962-Code-pa... Notice: Running a CIAndRule Notice: Running a CIChangeCaseValidationRule ========================================================== Validation Report: CASE 16962 http://smalltalkhub.com/mc/Pharo/Pharo50Inbox/main/SLICE-Issue-16962-Code-pa... ========================================================== Validation Errors: a CIChangeCaseValidationRule: Timeout (after 0:01:40:00) [...] [1] https://pharo.fogbugz.com/default.asp?16962 [2] https://ci.inria.fr/pharo/job/Pharo-5.0-Issue-Validator/20704//artifact/vali... [3] https://ci.inria.fr/pharo/job/Pharo-5.0-Issue-Validator/20587//artifact/vali...