Hi Filip, could you perhaps try to change all those sleep()s to `os.sync()`? For me it seems to fix the issue.
See [0] for a patch. If this doesn fix the issue, we obviously need to move the sync call out of the tests and into the db update. Best regards, Christian [0] https://github.com/pimutils/khal/commit/0b636f7633e86b9e136b06e9965cd3af0e3918f2
