diff --git a/test/regression/3388-command-line-parsing-does-not-preserve-invalid-utf8/rc b/test/regression/3388-command-line-parsing-does-not-preserve-invalid-utf8/rc
index 735fe182..0e215ca8 100644
--- a/test/regression/3388-command-line-parsing-does-not-preserve-invalid-utf8/rc
+++ b/test/regression/3388-command-line-parsing-does-not-preserve-invalid-utf8/rc
@@ -1 +1 @@
-evaluate-commands %sh{ printf 'set-register a "\xbd\xb2\x3d\xbc\x20\xe2\x8c\x98"' }
+evaluate-commands %sh{ printf 'set-register a "\275\262\75\274\040\342\214\230"' }