diff --git a/doc/examples/example_conditional.tum b/doc/examples/example_conditional.tum
index 7aaadf6..f04aa19 100644
--- a/doc/examples/example_conditional.tum
+++ b/doc/examples/example_conditional.tum
@@ -35,7 +35,7 @@ main:
                     no_fail: True
 
             exit_condition:
-                value: <| "$(last_test_result)" == "PASS" |>
+                value: <| "$(last_step_result)" == "PASS" |>
 
 
         - let:
diff --git a/doc/manual/sphinx/source/test_items/items_common_attributes.rst b/doc/manual/sphinx/source/test_items/items_common_attributes.rst
index b9c2f15..cc7e024 100644
--- a/doc/manual/sphinx/source/test_items/items_common_attributes.rst
+++ b/doc/manual/sphinx/source/test_items/items_common_attributes.rst
@@ -92,12 +92,12 @@ if not provided is given in the table as well.
 last test result
 -----------------------------------------------
 
-The global variable ``last_test_result`` is automatically set at the end of a test item execution.
+The global variable ``last_step_result`` is automatically set at the end of a test item execution.
 
-If the corresponding test item does not return any acutal, the content of the ``last_test_result``
+If the corresponding test item does not return any acutal, the content of the ``last_step_result``
 variable will be the test success (``PASS``, ``FAIL`` or ``SKIP``).
 
-It the test item returns a value, the ``last_test_result`` variable will contain the returned value.
+It the test item returns a value, the ``last_step_result`` variable will contain the returned value.
 
 The main test items returning a value are:
 
@@ -192,7 +192,7 @@ Export attribute
     - check:
         name: Example of result specific to the step 001
         values:
-            - $(last_test_result) == PASS
+            - $(last_step_result) == PASS
         key:
             - GID-1510554_step_1
         report:
diff --git a/doc/manual/sphinx/source/tum_syntax.rst b/doc/manual/sphinx/source/tum_syntax.rst
index 4cecc6b..ce204a3 100644
--- a/doc/manual/sphinx/source/tum_syntax.rst
+++ b/doc/manual/sphinx/source/tum_syntax.rst
@@ -132,7 +132,7 @@ library API (see :ref:`helper library<sec_python_helper_library>`)
 * ``test_name``: The name of the file being executed without extension,
 * ``home``: the path of the current user's home directory,
 * ``test_outputs``: list of the paths of the test log and test report (if any),
-* ``last_test_result``: test result of the last step (see :ref:`sec_item_common`),
+* ``last_step_result``: test result of the last step (see :ref:`sec_item_common`),
 * ``ts_start_<item_name>``: timestamp at the start of test item execution (see :ref:`sec_item_common`),
 * ``ts_end_<item_name>``: timestamp at the end of test item execution (see :ref:`sec_item_common`),
 * ``ts_duration_<item_name>``: duration of test item execution in seconds (see :ref:`sec_item_common`),
diff --git a/doc/manual/testium_manual.pdf b/doc/manual/testium_manual.pdf
index eb9a886..fb2ace6 100644
Binary files a/doc/manual/testium_manual.pdf and b/doc/manual/testium_manual.pdf differ
diff --git a/src/testium/interpreter/test_items/test_item.py b/src/testium/interpreter/test_items/test_item.py
index 2557e0c..d1953f6 100644
--- a/src/testium/interpreter/test_items/test_item.py
+++ b/src/testium/interpreter/test_items/test_item.py
@@ -279,9 +279,9 @@ class TestItem:
 
         self.result.sendStatus(self.status_queue)
         if not self.result.value is None:
-            tm.setgd("last_test_result", str(self.result.value))
+            tm.setgd("last_step_result", str(self.result.value))
         else:
-            tm.setgd("last_test_result", str(self.result.test_result))
+            tm.setgd("last_step_result", str(self.result.test_result))
         self.write_footer()
         self._is_running = False
         self._is_stopped = False
@@ -316,12 +316,6 @@ class TestItem:
             print(e)
             self.result.set(TestValue.FAILURE, "Result processing failed")
 
-        if isinstance(self.result.value, bool):
-            if self.result.value:
-                self.result.set(TestValue.SUCCESS, "Processing result returned 'True'")
-            else:
-                self.result.set(TestValue.FAILURE, "Processing result returned 'False'")
-
     def process_report(self, report_eval):
         tm.print_debug(f"Export reported values:")
         rep_eval = self._prms.expanse(report_eval)
diff --git a/src/testium/interpreter/utils/params.py b/src/testium/interpreter/utils/params.py
index d8c22a1..4c39ea4 100644
--- a/src/testium/interpreter/utils/params.py
+++ b/src/testium/interpreter/utils/params.py
@@ -10,7 +10,7 @@ class TestItemParams:
         self._parent = parent
 
     def expanse(self, param_value):
-        return expanse(param_value, self._parent)
+        return expanse(param_value, parent=self._parent)
 
     def getParam(self, parameter, default=None, required=False, processed=False):
         """Returns a parameter value from the test item dictionnary.
diff --git a/test/validation/items/common/results/test.tum b/test/validation/items/common/results/test.tum
index fb17fbe..f9cec2c 100644
--- a/test/validation/items/common/results/test.tum
+++ b/test/validation/items/common/results/test.tum
@@ -49,7 +49,7 @@
             file: $(test_path)$(psep)results$(psep)results.py
             func_name: echo
             param: [ 28 ]
-            expected_result: "$(last_test_result)"
+            expected_result: "$(last_step_result)"
 
 - group:
     name : Expected result Failure raised issue
diff --git a/test/validation/items/lua_func/lua_func.lua b/test/validation/items/lua_func/lua_func.lua
new file mode 100644
index 0000000..ad3c409
--- /dev/null
+++ b/test/validation/items/lua_func/lua_func.lua
@@ -0,0 +1,30 @@
+tm = require("tm")
+
+local module = {}
+
+function module.donothing(param)
+    return 0
+end
+
+function module.assertparam(param)
+    assert(param)
+end
+
+function module.checkglobal(param, index)
+    return tm.gd("lua_data_to_be_returned")[index]
+end
+
+function module.should_not_be_called(param)
+    assert(false)
+end
+
+function module.echo(param)
+    return param
+end
+
+function module.tuple_return(first, second)
+    return first, second
+end
+
+
+return module
\ No newline at end of file
diff --git a/test/validation/items/lua_func/param.yaml b/test/validation/items/lua_func/param.yaml
new file mode 100644
index 0000000..3caeeaf
--- /dev/null
+++ b/test/validation/items/lua_func/param.yaml
@@ -0,0 +1,6 @@
+skipped_test_item: ['skipped_checkglobal']
+
+lua_data_to_be_returned:
+  - 1
+  - {a: 1, b: 2}
+  - ["a", 1, 2.1, True]
\ No newline at end of file
diff --git a/test/validation/items/func/test.tum b/test/validation/items/lua_func/test.tum
similarity index 100%
rename from test/validation/items/func/test.tum
rename to test/validation/items/lua_func/test.tum
diff --git a/test/validation/items/func/param.yaml b/test/validation/items/py_func/param.yaml
similarity index 100%
rename from test/validation/items/func/param.yaml
rename to test/validation/items/py_func/param.yaml
diff --git a/test/validation/items/func/func.py b/test/validation/items/py_func/py_func.py
similarity index 100%
rename from test/validation/items/func/func.py
rename to test/validation/items/py_func/py_func.py
diff --git a/test/validation/items/py_func/test.tum b/test/validation/items/py_func/test.tum
new file mode 100644
index 0000000..7819af3
--- /dev/null
+++ b/test/validation/items/py_func/test.tum
@@ -0,0 +1,179 @@
+
+- lua_func:
+    name: pass lua_func
+    key: $(test)_PASS
+    file: lua_func.lua
+    func_name: func_to_be_executed
+    param:
+        - true
+
+- lua_func:
+    name: fail lua_func
+    key: $(test)_FAIL
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: assertparam
+    param:
+        - false
+
+- lua_func:
+    name: fail lua_func with expected result FAIL
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: assertparam
+    param:
+        - false
+    expected_result: FAIL
+
+- lua_func:
+    name: pass lua_func with expected result FAIL
+    key: $(test)_FAIL
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: assertparam
+    param:
+        - true
+    expected_result: FAIL
+
+- lua_func:
+    name: expected -1
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: echo
+    param:
+        - -1
+    expected_result: -1
+
+- lua_func:
+    name: expected eval
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: echo
+    param:
+        - -1
+    expected_result: "354848436 - 354848437"
+
+- lua_func:
+    name: expected table
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: echo
+    param:
+        - [-1, a, {toto: tata}]
+    expected_result: "[-1, 'a', {'toto': 'tata'}]"
+
+- lua_func:
+    name: global param lua_func
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: checkglobal
+    param:
+        - $(test parameter)
+
+- let:
+    name:  python2func
+    key: $(test)_PASS
+    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
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: should_not_be_called
+    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 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
+    func_name: checkglobal
+    skipped: 1
+    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:
+        - group:
+            name: Function result failure
+            steps:
+                - lua_func:
+                    name: int failure
+                    key: $(test)_FAIL
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: echo
+                    param: [-1]
+                - lua_func:
+                    name: float failure
+                    key: $(test)_FAIL
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: echo
+                    param: [-1.3]
+                - lua_func:
+                    name: String failure
+                    key: $(test)_FAIL
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: echo
+                    param: [ "FAIL" ]
+                - lua_func:
+                    name: Tuple int,str failure
+                    key: $(test)_FAIL
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: tuple_return
+                    param: [ -1, "Got a failure" ]
+        - group:
+            name: Functions result success
+            steps:
+                - lua_func:
+                    name: int success
+                    key: $(test)_PASS
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: echo
+                    param: [0]
+                - lua_func:
+                    name: float success
+                    key: $(test)_PASS
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: echo
+                    param: [0.3]
+                - lua_func:
+                    name: String success
+                    key: $(test)_PASS
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: echo
+                    param: [ "Something that is not only strictly FAIL" ]
+                - lua_func:
+                    name: Tuple int,str success
+                    key: $(test)_PASS
+                    file: $(test_path)$(psep)lua_func.lua
+                    func_name: tuple_return
+                    param: [ 0, "OK" ]