diff --git a/lib/libcasper/services/cap_grp/tests/grp_test.c b/lib/libcasper/services/cap_grp/tests/grp_test.c
index e2bb5e22eb1a..1e84e293e214 100644
--- a/lib/libcasper/services/cap_grp/tests/grp_test.c
+++ b/lib/libcasper/services/cap_grp/tests/grp_test.c
@@ -321,6 +321,8 @@ test_cmds(cap_channel_t *origcapgrp)
 	capgrp = cap_clone(origcapgrp);
 	CHECK(capgrp != NULL);
 
+	cap_setgrent(capgrp);
+
 	cmds[0] = "getgrent";
 	cmds[1] = "getgrent_r";
 	cmds[2] = "getgrnam";
@@ -361,6 +363,8 @@ test_cmds(cap_channel_t *origcapgrp)
 	capgrp = cap_clone(origcapgrp);
 	CHECK(capgrp != NULL);
 
+	cap_setgrent(capgrp);
+
 	cmds[0] = "getgrent";
 	cmds[1] = "getgrent_r";
 	cmds[2] = "getgrnam";