diff --git a/spec/lua/test_enum_invalid.lua b/spec/lua/test_enum_invalid.lua
index 998488f13..0aa93fbf4 100644
--- a/spec/lua/test_enum_invalid.lua
+++ b/spec/lua/test_enum_invalid.lua
@@ -1,3 +1,5 @@
+-- Autogenerated from KST: please remove this line if doing any edits by hand!
+
 local luaunit = require("luaunit")
 
 require("enum_invalid")
@@ -8,5 +10,5 @@ function TestEnumInvalid:test_enum_invalid()
     local r = EnumInvalid:from_file("src/term_strz.bin")
 
     luaunit.assertEquals(r.pet_1, EnumInvalid.Animal.dog)
-    luaunit.assertNil(r.pet_2)
+    luaunit.assertEquals(r.pet_2, 111)
 end
diff --git a/spec/lua/test_switch_manual_enum_invalid.lua b/spec/lua/test_switch_manual_enum_invalid.lua
index 35267c666..a7cceaba7 100644
--- a/spec/lua/test_switch_manual_enum_invalid.lua
+++ b/spec/lua/test_switch_manual_enum_invalid.lua
@@ -1,3 +1,5 @@
+-- Autogenerated from KST: please remove this line if doing any edits by hand!
+
 local luaunit = require("luaunit")
 
 require("switch_manual_enum_invalid")
@@ -8,8 +10,8 @@ function TestSwitchManualEnumInvalid:test_switch_manual_enum_invalid()
     local r = SwitchManualEnumInvalid:from_file("src/enum_negative.bin")
 
     luaunit.assertEquals(#r.opcodes, 2)
-    luaunit.assertNil(r.opcodes[0 + 1].code)
+    luaunit.assertEquals(r.opcodes[0 + 1].code, 255)
     luaunit.assertNil(r.opcodes[0 + 1].body)
-    luaunit.assertNil(r.opcodes[1 + 1].code)
+    luaunit.assertEquals(r.opcodes[1 + 1].code, 1)
     luaunit.assertNil(r.opcodes[1 + 1].body)
 end
diff --git a/spec/lua/test_switch_manual_enum_invalid_else.lua b/spec/lua/test_switch_manual_enum_invalid_else.lua
index cb49f8eda..9369687ba 100644
--- a/spec/lua/test_switch_manual_enum_invalid_else.lua
+++ b/spec/lua/test_switch_manual_enum_invalid_else.lua
@@ -1,3 +1,5 @@
+-- Autogenerated from KST: please remove this line if doing any edits by hand!
+
 local luaunit = require("luaunit")
 
 require("switch_manual_enum_invalid_else")
@@ -8,8 +10,8 @@ function TestSwitchManualEnumInvalidElse:test_switch_manual_enum_invalid_else()
     local r = SwitchManualEnumInvalidElse:from_file("src/enum_negative.bin")
 
     luaunit.assertEquals(#r.opcodes, 2)
-    luaunit.assertNil(r.opcodes[0 + 1].code)
+    luaunit.assertEquals(r.opcodes[0 + 1].code, 255)
     luaunit.assertEquals(r.opcodes[0 + 1].body.value, 123)
-    luaunit.assertNil(r.opcodes[1 + 1].code)
+    luaunit.assertEquals(r.opcodes[1 + 1].code, 1)
     luaunit.assertEquals(r.opcodes[1 + 1].body.value, 123)
 end