Too tight timeout on test

There is a too tight timeout on tests that makes Debian's slow archs fail. Example:

https://buildd.debian.org/status/fetch.php?pkg=qtwebsockets-opensource-src&arch=hurd-i386&ver=5.10.1-2&stamp=1523796345&raw=0

FAIL! : tst_QWebSocket::tst_errorString() QTestLib: This test case check ("((((errorSpy.count())) == (1)))") failed because the requested timeout (5000 ms) was too short, 5150 ms would have been sufficient this time.

Can we make this a little bit larger, let's say 6000ms at very least?