diff --git a/tests/filetypes.vim b/tests/filetypes.vim
index cfb58aa8..e66621f4 100644
--- a/tests/filetypes.vim
+++ b/tests/filetypes.vim
@@ -14,6 +14,9 @@ func! TestFiletype(filetype)
   endtry
 endfunc
 
+" Special case for vim-ledger, which will crash on modern Vims if this isn't set.
+let g:ledger_is_hledger = v:true
+
 " DO NOT EDIT CODE BELOW, IT IS GENERATED WITH MAKEFILE
 
 call TestFiletype('8th')