Index: tests/sys/audit/file-attribute-modify.c
===================================================================
--- tests/sys/audit/file-attribute-modify.c
+++ tests/sys/audit/file-attribute-modify.c
@@ -711,6 +711,15 @@
 
 ATF_TC_CLEANUP(chflagsat_success, tc)
 {
+
+	/*
+	 * PR 247761: wipe out SF_IMMUTABLE so kyua can clean up the work
+	 * directory.
+	 *
+	 * This isn't needed for `chflagsat_failure` because the chflagsat(2)
+	 * operation is guaranteed to fail.
+	 */
+	chflags(path, 0);
 	cleanup();
 }