package included in .packages file, missing in check-patch.sh - caching issue?

I added 2 packages to ovirt-imageio packages files: https://gerrit.ovirt.org/#/c/85639/ The next patch using these packages https://gerrit.ovirt.org/#/c/85245/ fail to import the package on some slaves: *00:02:34.093* ==================================== ERRORS ====================================*00:02:34.093* ____________________ ERROR collecting test/qemuimg_test.py _____________________*00:02:34.093* ImportError while importing test module '/home/jenkins/workspace/ovirt-imageio_master_check-patch-el7-x86_64/ovirt-imageio/common/test/qemuimg_test.py'.*00:02:34.094* Hint: make sure your test modules/packages have valid Python names.*00:02:34.094* Traceback:*00:02:34.094* test/qemuimg_test.py:16: in <module>*00:02:34.094* from ovirt_imageio_common import qemuimg*00:02:34.094* ovirt_imageio_common/qemuimg.py:11: in <module>*00:02:34.094* from . compat import subprocess*00:02:34.095* ovirt_imageio_common/compat.py:12: in <module>*00:02:34.095* import subprocess32 as subprocess # NOQA: F401 (unused import)*00:02:34.095* E ImportError: No module named subprocess32*00:02:34.095* !!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!*00:02:34.096* =========================== 1 error in 1.06 seconds ============================ Do we have a way to invalidate mock cache manually? Nir