@@ -43,12 +43,14 @@
 
 	rm -f "${file}"
 done
 
 # Start Xvfb for X11-based tests
-Xvfb -nolisten tcp :31 >/dev/null 2>/dev/null &
-XVFB_PID="$!"
+XVFB_PID="$(
+	Xvfb :31 -screen 0 800x600x24 -nolisten tcp >/dev/null 2>/dev/null &
+	echo "$!"
+)"
 DISPLAY=:31
 export DISPLAY
 
 failed=""
 for kit in normal normal-zip normal-threaded normal-threaded-zip normal-statictk normal-notk normal-threaded-notk normal-threaded-zip-notk normal-nomk4 min min-static win32-i586 win32-i586-zip win32-i586-threaded win32-i586-threaded-zip win32-i586-notk win32-i586-threaded-notk win32-i586-nomk4 linux-arm-min; do