diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 4570fb7a..36a28b0b 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -39,7 +39,7 @@ EXTRA_PROGRAMS = check_mysql check_radius check_pgsql check_snmp check_hpjd \
 	check_nagios check_by_ssh check_dns check_nt check_ide_smart	\
 	check_procs check_mysql_query check_apt
 
-EXTRA_DIST = t utils.c netutils.c sslutils.c popen.c utils.h netutils.h \
+EXTRA_DIST = t tests utils.c netutils.c sslutils.c popen.c utils.h netutils.h \
 	popen.h common.h runcmd.c runcmd.h
 
 PLUGINHDRS = common.h