diff --git a/src/tests/attach.c b/src/tests/attach.c
index 2c771278c..452ba8652 100644
--- a/src/tests/attach.c
+++ b/src/tests/attach.c
@@ -124,7 +124,7 @@ static int test_attach_lsm_func(struct lxc_container *ct)
 	ret = 0;
 
 err2:
-	wait_for_pid(pid);
+	(void)wait_for_pid(pid);
 err1:
 	close(pipefd[0]);
 	close(pipefd[1]);
@@ -178,7 +178,7 @@ static int test_attach_lsm_cmd(struct lxc_container *ct)
 	ret = 0;
 
 err2:
-	wait_for_pid(pid);
+	(void)wait_for_pid(pid);
 err1:
 	close(pipefd[0]);
 	close(pipefd[1]);
@@ -240,7 +240,7 @@ static int test_attach_func(struct lxc_container *ct)
 	ret = 0;
 
 err2:
-	wait_for_pid(pid);
+	(void)wait_for_pid(pid);
 err1:
 	close(pipefd[0]);
 	close(pipefd[1]);