diff --git a/tests/usertools/35_usermod-u_invalid_UID/data/usermod.err b/tests/usertools/35_usermod-u_invalid_UID/data/usermod.err
index 765ffbc4..2d5c5e97 100644
--- a/tests/usertools/35_usermod-u_invalid_UID/data/usermod.err
+++ b/tests/usertools/35_usermod-u_invalid_UID/data/usermod.err
@@ -1 +1 @@
-usermod: invalid numeric argument '100a1'
+usermod: invalid user ID '100a1'