diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index dbeb78d..b925b23 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -2083,7 +2083,7 @@
 func Test_read_invalid()
   set encoding=latin1
   " This was not properly checking for going past the end.
-  call assert_fails('r`=', 'E484')
+  call assert_fails('r`=', 'E484:')
   set encoding=utf-8
 endfunc