Commit aa4d8b07 authored by Andreas Klebinger's avatar Andreas Klebinger Committed by Marge Bot

Use os.devnull instead of '/dev/null' in the testsuite driver.

The later caused issues on windows by being translated into
"\\dev\\null" and python then trying to open this non-existant file.

So we now use os.devnull inside python and convert it to "/dev/null"
when calling out to the shell, which is bound to run in a unix like

This fixes an issue a test producing unexpected stderr output failed
with a framework failure instead of showing a diff of the output.
parent a38104b4
Pipeline #9420 failed with stages
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