Fix the "idna" system test
The commit contained in this MR should be applied to all maintained branches.
#1465 (closed) will be fixed by another commit which I will only place in the 9.11 backport of this MR.
The commit contained in this MR should be applied to all maintained branches.
#1465 (closed) will be fixed by another commit which I will only place in the 9.11 backport of this MR.