Index: usr.bin/truncate/tests/truncate_test.sh
===================================================================
--- usr.bin/truncate/tests/truncate_test.sh
+++ usr.bin/truncate/tests/truncate_test.sh
@@ -185,7 +185,7 @@
 
 	# Trying to get the ftruncate() call to return -1.
 	> exists.txt
-	atf_check chflags uimmutable exists.txt
+	atf_check chflags simmutable exists.txt
 
 	atf_check -s not-exit:0 -e file:stderr.txt truncate -s1 exists.txt
 }