diff --git a/test.lua b/test.lua
index 3c0f17f..cc94d94 100644
--- a/test.lua
+++ b/test.lua
@@ -14,7 +14,7 @@ end
 
 function check_eq(x, expected, msg)
   if not eq(x, expected) then
-    error(msg..'; got "'..x..'"')
+    error(msg..'; should be "'..expected..'" but got "'..x..'"')
   end
 end