There seems to be a problem on pharo-contribution-linux64-4.ci.inria.fr AFAICT. I can reproduce the following to phenomena: 1. '(Delay forSeconds: 10) waitâ does not wait. 2. âDateAndTime nowâ does not change for long intervals. For instance, the following code: (FileSystem disk workingDirectory / 'foo.log') writeStreamDo: [ :stream | stream nextPutAll: DateAndTime now asString;crlf. stream nextPutAll: ([(Delay forSeconds: 10) wait] timeToRun / 1000) asString; crlf. stream nextPutAll: DateAndTime now asString ]. produces this output: 2014-03-04T21:32:21.396669+01:00 0:00:00:00 2014-03-04T21:32:21.396669+01:00 Too me (and my untrained eye) this looks like a system clock problem. Could somebode take a look at the server in question? Cheers, Max