Fix docstrings.

Author: WaVEV

tests/queries_/test_objectid.py

@@ -63,8 +63,8 @@ def test_filter_group_id_in_subquery(self):
                 qs = Tag.objects.filter(group_id__in=subquery).order_by("name")
                 self.assertSequenceEqual(qs, [self.t3, self.t4])
 
-    def test_union_children_to_select_parents(self):
-        """Union query to select parents of children based on group_id"""
+    def test_filter_parent_by_children_values(self):
+        """Query to select parents of children based on group_id"""
         child_group_ids = [self.group_id_str_1, self.group_id_obj_1]
         for group_id in child_group_ids:
             with self.subTest(group_id=group_id):
@@ -88,7 +88,7 @@ def test_filter_group_id_union_with(self):
                 self.assertSequenceEqual(union_qs, [self.t3, self.t4])
 
     def test_invalid_object_id(self):
-        """Combine queries using union"""
+        """Test invalid value in filter"""
         value = "value1"
         msg = f"Field 'group_id' expected an ObjectId but got '{value}'."
         with self.assertRaisesMessage(ValueError, msg):