diff --git a/yt/frontends/adaptahop/api.py b/yt/frontends/adaptahop/api.py
index 29007bd510c..15d3af7ed96 100644
--- a/yt/frontends/adaptahop/api.py
+++ b/yt/frontends/adaptahop/api.py
@@ -6,14 +6,6 @@
 
 """
 
-# -----------------------------------------------------------------------------
-# Copyright (c) 2014, yt Development Team.
-#
-# Distributed under the terms of the Modified BSD License.
-#
-# The full license is in the file COPYING.txt, distributed with this software.
-# -----------------------------------------------------------------------------
-
 from . import tests
 from .data_structures import AdaptaHOPDataset
 from .fields import AdaptaHOPFieldInfo
diff --git a/yt/frontends/adaptahop/tests/test_outputs.py b/yt/frontends/adaptahop/tests/test_outputs.py
index a24a5d2786b..7beea642c2c 100644
--- a/yt/frontends/adaptahop/tests/test_outputs.py
+++ b/yt/frontends/adaptahop/tests/test_outputs.py
@@ -5,14 +5,6 @@
 
 """
 
-# -----------------------------------------------------------------------------
-# Copyright (c) 2015, yt Development Team.
-#
-# Distributed under the terms of the Modified BSD License.
-#
-# The full license is in the file COPYING.txt, distributed with this software.
-# -----------------------------------------------------------------------------
-
 import numpy as np
 
 from yt.frontends.adaptahop.data_structures import AdaptaHOPDataset
diff --git a/yt/frontends/ytdata/tests/test_old_outputs.py b/yt/frontends/ytdata/tests/test_old_outputs.py
index f6cff200d06..31db944f2c0 100644
--- a/yt/frontends/ytdata/tests/test_old_outputs.py
+++ b/yt/frontends/ytdata/tests/test_old_outputs.py
@@ -5,14 +5,6 @@
 
 """
 
-# -----------------------------------------------------------------------------
-# Copyright (c) yt Development Team. All rights reserved.
-#
-# Distributed under the terms of the Modified BSD License.
-#
-# The full license is in the file COPYING.txt, distributed with this software.
-# -----------------------------------------------------------------------------
-
 import os
 import shutil
 import tempfile