diff --git a/src/testdir/test43.in b/src/testdir/test43.in
index 49a97d939d..7c545073da 100644
--- a/src/testdir/test43.in
+++ b/src/testdir/test43.in
@@ -1,6 +1,7 @@
 Tests for regexp with various magic settings.
 
 STARTTEST
+:so small.vim
 :set nocompatible viminfo+=nviminfo
 /^1
 /a*b\{2}c\+/e