diff --git a/doc/manual/sphinx/source/test_items/let_test_item.rst b/doc/manual/sphinx/source/test_items/let_test_item.rst
index f896259..e1eb6f3 100644
--- a/doc/manual/sphinx/source/test_items/let_test_item.rst
+++ b/doc/manual/sphinx/source/test_items/let_test_item.rst
@@ -9,9 +9,9 @@ This element is of the following form:
     - let:
         name: Let Item
         values:
-            key1: value1
-            key2: value2
-            key3: <| $(variable)[$(loop_index)] |>
+            - key1: value1
+            - key2: value2
+            - key3: <| $(variable)[$(loop_index)] |>
 
 The ``let`` element is used to set values in the global directory.
 
diff --git a/doc/manual/sphinx/source/tum_syntax.rst b/doc/manual/sphinx/source/tum_syntax.rst
index 0997d2b..c4ea7ab 100644
--- a/doc/manual/sphinx/source/tum_syntax.rst
+++ b/doc/manual/sphinx/source/tum_syntax.rst
@@ -51,8 +51,8 @@ The parameter file can be specified in the `.tum` file root:
     :caption: configuration files definition in the main `.tum` test file
 
     config_file:
-        config1.yaml
-        config2.yaml
+        - config1.yaml
+        - config2.yaml
 
     main:
         name: Test example
diff --git a/test/validation/items/let/test.tum b/test/validation/items/let/test.tum
index 83d4252..47a6070 100644
--- a/test/validation/items/let/test.tum
+++ b/test/validation/items/let/test.tum
@@ -11,8 +11,8 @@
         - let:
             name:  Let it be
             values:
-                it: $(loop_param)
-                be: <| $(loop_param) == $(it) |>
+                - it: $(loop_param)
+                - be: <| $(loop_param) == $(it) |>
 
 - loop:
     name: Cycle iterating on list
diff --git a/test/validation/items/lua_func/test.tum b/test/validation/items/lua_func/test.tum
index e87128d..ccef4b5 100644
--- a/test/validation/items/lua_func/test.tum
+++ b/test/validation/items/lua_func/test.tum
@@ -1,7 +1,7 @@
 - let:
     name: lua_func test constants,
     values:
-      lua_func test parameter: test parameter lua_func
+      - lua_func test parameter: test parameter lua_func
 
 - lua_func:
     name: fail lua_func
diff --git a/test/validation/items/py_func/test.tum b/test/validation/items/py_func/test.tum
index e67b564..c4ba269 100644
--- a/test/validation/items/py_func/test.tum
+++ b/test/validation/items/py_func/test.tum
@@ -1,7 +1,7 @@
 - let:
     name: py_func test constants,
     values:
-      py_func test parameter: test parameter
+      - py_func test parameter: test parameter
 
 - py_func:
     name: pass py_func
diff --git a/test/validation/main.tum b/test/validation/main.tum
index aa15916..e73e99f 100644
--- a/test/validation/main.tum
+++ b/test/validation/main.tum
@@ -31,7 +31,11 @@ main:
 
 {% for item in items %}
                 # item test
-                - let: {name: {{ item }} test constants, values: {test: {{ item }}, test_path: items/$(test)}}
+                - let: 
+                    name: {{ item }} test constants
+                    values: 
+                        - test: {{ item }}
+                        - test_path: items/$(test)
                 - group:
                     name: {{ item }} test
                     steps: