diff --git a/test/validation/items/lua_func/lua_func.lua b/test/validation/items/lua_func/lua_func.lua
index d1577b7..3df3076 100644
--- a/test/validation/items/lua_func/lua_func.lua
+++ b/test/validation/items/lua_func/lua_func.lua
@@ -41,4 +41,12 @@ function module.get_context_value()
     return tm.gd("_lua_ctx_test_value")
 end
 
+function module.test_delgd()
+    tm.setgd("_lua_delgd_test", 42)
+    assert(tm.gd("_lua_delgd_test") == 42)
+    tm.delgd("_lua_delgd_test")
+    assert(tm.gd("_lua_delgd_test") == nil)
+    return 0
+end
+
 return module
\ No newline at end of file
diff --git a/test/validation/items/lua_func/test.tum b/test/validation/items/lua_func/test.tum
index d8e617b..6177dd4 100644
--- a/test/validation/items/lua_func/test.tum
+++ b/test/validation/items/lua_func/test.tum
@@ -180,6 +180,12 @@
                     func_name: tuple_return
                     param: [ 0, "OK" ]
 
+- lua_func:
+    name: delgd test
+    key: $(test)_PASS
+    file: $(test_path)$(psep)lua_func.lua
+    func_name: test_delgd
+
 - group:
     name: context_id tests
     steps:
diff --git a/test/validation/items/py_func/py_func.py b/test/validation/items/py_func/py_func.py
index d30232a..9f0ab66 100644
--- a/test/validation/items/py_func/py_func.py
+++ b/test/validation/items/py_func/py_func.py
@@ -47,3 +47,10 @@ def set_ns_value(val):
 def get_ns_value():
     obj = tm.gd("_py_ctx_ns_value", None)
     return obj.val if obj is not None else None
+
+def test_delgd():
+    tm.setgd("_py_delgd_test", 42)
+    assert tm.gd("_py_delgd_test") == 42
+    tm.delgd("_py_delgd_test")
+    assert tm.gd("_py_delgd_test", None) is None
+    return 0
diff --git a/test/validation/items/py_func/test.tum b/test/validation/items/py_func/test.tum
index 67cd828..ae77546 100644
--- a/test/validation/items/py_func/test.tum
+++ b/test/validation/items/py_func/test.tum
@@ -190,6 +190,12 @@
                     param: [ 0, "OK" ]
                     expected_result: [0, "OK"]
 
+- py_func:
+    name: delgd test
+    key: $(test)_PASS
+    file: $(test_path)$(psep)py_func.py
+    func_name: test_delgd
+
 - group:
     name: context_id tests
     steps: