diff --git a/tests/test_box.py b/tests/test_box.py
index bba6704..5193bec 100644
--- a/tests/test_box.py
+++ b/tests/test_box.py
@@ -17,7 +17,7 @@
 import logging
 import unittest
 
-from construct import Container
+from construct import Container, ListContainer
 from pymp4.parser import Box
 
 log = logging.getLogger(__name__)
@@ -89,13 +89,13 @@ def test_mdhd_build(self):
 
     def test_moov_build(self):
         moov = \
-            Container(type="moov", children=[  # 96 bytes
-                Container(type="mvex", children=[  # 88 bytes
+            Container(type="moov", children=ListContainer([  # 96 bytes
+                Container(type="mvex", children=ListContainer([  # 88 bytes
                     Container(type="mehd", version=0, flags=0, fragment_duration=0),  # 16 bytes
                     Container(type="trex", track_ID=1),  # 32 bytes
                     Container(type="trex", track_ID=2),  # 32 bytes
-                ])
-            ])
+                ]))
+            ]))
 
         moov_data = Box.build(moov)
 
@@ -141,9 +141,9 @@ def test_stsd_parse(self):
                 type="stsd",
                 version=0,
                 flags=0,
-                entries=[
+                entries=ListContainer([
                     Container(format='tx3g', data_reference_index=1, data=tx3g_data)
-                ],
+                ]),
                 end=len(in_bytes)
             )
         )
diff --git a/tests/test_util.py b/tests/test_util.py
index d30ac3d..0e45347 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -17,7 +17,7 @@
 import logging
 import unittest
 
-from construct import Container
+from construct import Container, ListContainer
 
 from pymp4.exceptions import BoxNotFound
 from pymp4.util import BoxUtil
@@ -28,23 +28,23 @@
 class BoxTests(unittest.TestCase):
     box_data = Container(
         type="demo",
-        children=[
+        children=ListContainer([
             Container(type="a   ", id=1),
             Container(type="b   ", id=2),
             Container(
                 type="c   ",
-                children=[
+                children=ListContainer([
                     Container(type="a   ", id=3),
                     Container(type="b   ", id=4)
-                ]
+                ])
             ),
             Container(type="d   ", id=5)
-        ]
+        ])
     )
 
     box_extended_data = Container(
         type="test",
-        children=[
+        children=ListContainer([
             Container(
                 type="a   ",
                 id=1,
@@ -55,7 +55,7 @@ class BoxTests(unittest.TestCase):
                 id=2,
                 extended_type=b"e--b"
             )
-        ]
+        ])
     )
 
     def test_find(self):
@@ -73,10 +73,10 @@ def test_find_after_nest(self):
     def test_find_nested_type(self):
         self.assertListEqual(
             list(BoxUtil.find(self.box_data, "c   ")),
-            [Container(type="c   ", children=[
+            [Container(type="c   ", children=ListContainer([
                 Container(type="a   ", id=3),
                 Container(type="b   ", id=4),
-            ])]
+            ]))]
         )
 
     def test_find_empty(self):