diff --git a/src/testdir/test64.in b/src/testdir/test64.in
index f76f62f..346e792 100644
--- a/src/testdir/test64.in
+++ b/src/testdir/test64.in
@@ -270,6 +270,7 @@
 :call add(tl, [2, '\_[0-9]\+', "asfi\n9888u", "\n9888"])
 :call add(tl, [2, '\_f', "  \na ", "\n"])
 :call add(tl, [2, '\_f\+', "  \na ", "\na"])
+:call add(tl, [2, '[0-9A-Za-z-_.]\+', " @0_a.A-{ ", "0_a.A-"])
 :"
 :"""" Test start/end of line, start/end of file
 :call add(tl, [2, '^a.', "a_\nb ", "a_"])