diff --git a/tests.lua b/tests.lua
index 7f5d2b9..7a07e31 100644
--- a/tests.lua
+++ b/tests.lua
@@ -254,39 +254,39 @@ end)
 
 test("Testing tuple iteration", function()
     local T = immutable()
-    local t = T(1,4,9,nil,16)
-    local checks = {1,4,9,nil,16}
+    local t = T(1,4,9,nil,16,nil)
+    local checks = {1,4,9,nil,16,nil}
     local passed = 0
     for i,v in ipairs(t) do
         assert(checks[i] == v)
         passed = passed + 1
     end
-    assert(passed == 5)
+    assert(passed == 6)
     passed = 0
     for k,v in pairs(t) do
         assert(checks[k] == v)
         passed = passed + 1
     end
-    assert(passed == 5)
+    assert(passed == 6)
 end)
 
 test("Testing table iteration", function()
-    local Foo = immutable({"x", "y", "z"})
-    local f = Foo(1,nil,2)
-    local checks = {1,nil,2}
+    local Foo = immutable({"x", "y", "z","w"})
+    local f = Foo(1,nil,2,nil)
+    local checks = {1,nil,2,nil}
     local passed = 0
     for i,v in ipairs(f) do
         assert(checks[i] == v)
         passed = passed + 1
     end
-    assert(passed == 3)
+    assert(passed == 4)
     passed = 0
-    checks = {x=1,y=nil,z=2}
+    checks = {x=1,y=nil,z=2,w=nil}
     for k,v in pairs(f) do
         assert(checks[k] == v)
         passed = passed + 1
     end
-    assert(passed == 3)
+    assert(passed == 4)
 end)
 
 test("Testing __new", function()