diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index afd6750f884..d6161382831 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -38,6 +38,8 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20181116: Rename test file.
+OLD_FILES+=usr/tests/sys/netinet/reuseport_lb
 # 20181112: Cleanup old libcap_dns.
 OLD_LIBS+=lib/casper/libcap_dns.so.1
 OLD_LIBS+=usr/lib32/libcap_dns.so.1
diff --git a/tests/sys/netinet/Makefile b/tests/sys/netinet/Makefile
index 97376fcfe2b..539c966ac28 100644
--- a/tests/sys/netinet/Makefile
+++ b/tests/sys/netinet/Makefile
@@ -3,7 +3,7 @@
 TESTSDIR=	${TESTSBASE}/sys/netinet
 BINDIR=		${TESTSDIR}
 
-ATF_TESTS_C=	reuseport_lb
+ATF_TESTS_C=	so_reuseport_lb_test
 
 ATF_TESTS_SH=	fibs_test
 
diff --git a/tests/sys/netinet/reuseport_lb.c b/tests/sys/netinet/so_reuseport_lb_test.c
similarity index 100%
rename from tests/sys/netinet/reuseport_lb.c
rename to tests/sys/netinet/so_reuseport_lb_test.c