diff --git a/test/validation/items/lua_func/lua_func.lua b/test/validation/items/lua_func/lua_func.lua
index ad3c409..6f043d7 100644
--- a/test/validation/items/lua_func/lua_func.lua
+++ b/test/validation/items/lua_func/lua_func.lua
@@ -8,9 +8,15 @@ end
 
 function module.assertparam(param)
     assert(param)
+    return 0
 end
 
-function module.checkglobal(param, index)
+function module.checkglobal(param)
+    local res = tm.gd(param)
+    return res
+end
+
+function module.checkglobal2(index)
     return tm.gd("lua_data_to_be_returned")[index]
 end
 
diff --git a/test/validation/items/lua_func/test.tum b/test/validation/items/lua_func/test.tum
index cc27b2d..a673402 100644
--- a/test/validation/items/lua_func/test.tum
+++ b/test/validation/items/lua_func/test.tum
@@ -1,3 +1,7 @@
+- let:
+    name: lua_func test constants,
+    values:
+      lua_func test parameter: test parameter lua_func
 
 - lua_func:
     name: fail lua_func
@@ -58,7 +62,35 @@
     file: $(test_path)$(psep)lua_func.lua
     func_name: checkglobal
     param:
-        - $(test parameter)
+        - lua_func test parameter
+    expected_result: $(lua_func test parameter)
+
+- lua_func:
+    name: global param lua_func 1
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: checkglobal2
+    param:
+        - 1
+    expected_result: ($(lua_data_to_be_returned))[0]
+
+- lua_func:
+    name: global param lua_func 2
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: checkglobal2
+    param:
+        - 2
+    expected_result: ($(lua_data_to_be_returned))[1]
+
+- lua_func:
+    name: global param lua_func 3
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: checkglobal2
+    param:
+        - 3
+    expected_result: ($(lua_data_to_be_returned))[2]
 
 - let:
     name:  python2func
@@ -66,13 +98,6 @@
     values:
         - py: $(test_path)$(psep)lua_func.lua
 
-- lua_func:
-    name: global param lua_func
-    key: $(test)_PASS
-    file: $(py)
-    func_name: checkglobal
-    param:
-        - $(test parameter)
 
 - lua_func:
     name: skipped_checkglobal
@@ -89,14 +114,6 @@
     param:
         - $(test parameter)
 
-- lua_func:
-    name: skipped true
-    file: $(test_path)$(psep)lua_func.lua
-    func_name: checkglobal
-    skipped: true
-    param:
-        - $(test parameter)
-
 - lua_func:
     name: skipped 1
     file: $(test_path)$(psep)lua_func.lua
@@ -105,13 +122,6 @@
     param:
         - $(test parameter)
 
-- lua_func:
-    name: FunctionItem test
-    file: $(test_path)$(psep)lua_func.lua
-    func_name: ValidationTest
-    param:
-        - $(test parameter)
-
 - group:
     name: Function results check
     steps: