perl-PPI-Tester-0.15-3.fc21 fails to build due to Xfvb:

+ xvfb-run -a make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'inc', 'blib/lib', 'blib/arch')" t/*.t
Xlib:  extension "RANDR" missing on display ":99".
t/01_compile.t .. ok
t/97_meta.t ..... skipped: Author tests not required for installation
t/98_pod.t ...... skipped: Author tests not required for installation
t/99_pmv.t ...... skipped: Author tests not required for installation
All tests successful.
Files=4, Tests=3,  1 wallclock secs ( 0.03 usr  0.01 sys +  0.45 cusr  0.05 csys =  0.54 CPU)
Result: PASS
/usr/bin/xvfb-run: line 171: kill: (31315) - No such process
RPM build errors:
error: Bad exit status from /var/tmp/rpm-tmp.BZFQgl (%check)
    Bad exit status from /var/tmp/rpm-tmp.BZFQgl (%check)
Child return code was: 1

The difference between last working and current build root is:

Removed packages:
	crypto-policies-0.9
	gdb-7.7.1
	hwdata-0.266
	libblkid-2.24.2
	libmount-2.24.2
	libuuid-2.24.2
	perl-IO-Socket-SSL-1.992
	readline-6.2
	tzdata-2014c
	util-linux-2.24.2
	xorg-x11-server-common-1.15.99.902
	xorg-x11-server-Xvfb-1.15.99.902
Added packages:
	crypto-policies-20140620
	gdb-7.7.90.20140613
	hwdata-0.267
	libblkid-2.25
	libmount-2.25
	libsmartcols-2.25
	libuuid-2.25
	perl-IO-Socket-SSL-1.993
	readline-6.3
	tzdata-2014e
	util-linux-2.25
	xorg-x11-server-common-1.15.99.903
	xorg-x11-server-Xvfb-1.15.99.903