diff --git a/perl-Date-Manip.spec b/perl-Date-Manip.spec
index bbff542..741d277 100644
--- a/perl-Date-Manip.spec
+++ b/perl-Date-Manip.spec
@@ -70,6 +70,7 @@ unset DATE_MANIP DATE_MANIP_DEBUG DATE_MANIP_DEBUG_ABBREVS \
     DATE_MANIP_DEBUG_ZONES Date_Manip_RELEASE_TESTING DATE_MANIP_TEST_DM5 \
     OS MULTINET_TIMEZONE 'SYS$TIMEZONE_DIFFERENTIAL' 'SYS$TIMEZONE_NAME' \
     'SYS$TIMEZONE_RULE' 'TCPIP$TZ' 'UCX$TZ'
+export HARNESS_OPTIONS=j$(perl -e 'if ($ARGV[0] =~ /.*-j([0-9][0-9]*).*/) {print $1} else {print 1}' -- '%{?_smp_mflags}')
 make test
 
 %files
@@ -87,6 +88,7 @@ make test
 * Wed Jan 03 2024 Petr Pisar <ppisar@redhat.com> - 6.93-2
 - Adapt test envinronment guard to changes in 6.93
 - List files explicitly
+- Run tests in parallel
 
 * Sun Dec 03 2023 Packit <hello@packit.dev> - 6.93-1
 - Release: v6.93 (Sullivan Beck)