diff --git a/tests.lua b/tests.lua
index c6dec3f..18f3ebb 100644
--- a/tests.lua
+++ b/tests.lua
@@ -101,6 +101,10 @@ test("Testing singletons", function()
     assert(T1() ~= T2())
 end)
 
+test("Testing extra args", function()
+    assert(not pcall(function() Vec(1,2,3) end))
+end)
+
 test("Testing __add metamethod", function()
     assert(v + Vec(5,6) == Vec(6,9))
 end)