diff --git a/systemd.spec b/systemd.spec
index 716b31a..45da1f7 100644
--- a/systemd.spec
+++ b/systemd.spec
@@ -727,6 +727,7 @@ VMLINUX_H_PATH=$(%python3 -c '%find_vmlinux_h')
 
 CONFIGURE_OPTS=(
         -Dmode=%[%{with upstream}?"developer":"release"]
+        -Dslow-tests=true
         -Dsysvinit-path=/etc/rc.d/init.d
         -Drc-local=/etc/rc.d/rc.local
         -Dntp-servers='0.%{ntpvendor}.pool.ntp.org 1.%{ntpvendor}.pool.ntp.org 2.%{ntpvendor}.pool.ntp.org 3.%{ntpvendor}.pool.ntp.org'