diff --git a/test/zdtm/live/static/session00.c b/test/zdtm/live/static/session00.c
index 4da0d334e..bc8f00940 100644
--- a/test/zdtm/live/static/session00.c
+++ b/test/zdtm/live/static/session00.c
@@ -89,6 +89,7 @@ static int fork_child(int i)
 				exit(1);
 			}
 
+			close(p[1]);
 			wait(NULL);
 			if (getsid(getpid()) != sid) {
 				fail("The process %d (%x) has SID=%d (expected %d)",
@@ -115,6 +116,7 @@ static int fork_child(int i)
 				exit(1);
 			}
 
+			close(p[1]);
 			wait(NULL);
 			if (getsid(getpid()) != sid) {
 				fail("The process %d (%x) has SID=%d (expected %d)",