diff --git a/tests/test.lua b/tests/test.lua
index 8f113a8..91378ff 100644
--- a/tests/test.lua
+++ b/tests/test.lua
@@ -1,4 +1,4 @@
-#!/usr/local/bin/lua
+#!/usr/local/bin/lua50
 -- See Copyright Notice in license.html
 
 TOTAL_FIELDS = 40