diff --git a/beat/core/baseformat.py b/beat/core/baseformat.py
index 37b11a77ba283b7290d53a93a73947b5c48d77a1..0de43893affaeaf9557e0741bd0f19da642d5b45 100644
--- a/beat/core/baseformat.py
+++ b/beat/core/baseformat.py
@@ -42,4 +42,4 @@ baseformat
 Froward imports from :py:mod:`beat.backend.python.baseformat`
 """
 
-from beat.backend.python.baseformat import *
+from beat.backend.python.baseformat import *  # noqa
diff --git a/beat/core/data.py b/beat/core/data.py
index f929f802fcc141c9434dec644b7f1512540cb538..6e8f7b5e9a1431e00a968a695ddaa3623f1c0eef 100644
--- a/beat/core/data.py
+++ b/beat/core/data.py
@@ -54,15 +54,15 @@ Forward importing from :py:mod:`beat.backend.python.data`:
 :py:func:`beat.backend.python.data.foundSplitRanges`
 """
 
-from beat.backend.python.data import mixDataIndices
-from beat.backend.python.data import getAllFilenames
-from beat.backend.python.data import DataSource
-from beat.backend.python.data import CachedDataSource
-from beat.backend.python.data import DatabaseOutputDataSource
-from beat.backend.python.data import RemoteDataSource
-from beat.backend.python.data import DataSink
-from beat.backend.python.data import CachedDataSink
-from beat.backend.python.data import StdoutDataSink
-from beat.backend.python.data import load_data_index
-from beat.backend.python.data import load_data_index_db
-from beat.backend.python.data import foundSplitRanges
+from beat.backend.python.data import mixDataIndices  # noqa
+from beat.backend.python.data import getAllFilenames  # noqa
+from beat.backend.python.data import DataSource  # noqa
+from beat.backend.python.data import CachedDataSource  # noqa
+from beat.backend.python.data import DatabaseOutputDataSource  # noqa
+from beat.backend.python.data import RemoteDataSource  # noqa
+from beat.backend.python.data import DataSink  # noqa
+from beat.backend.python.data import CachedDataSink  # noqa
+from beat.backend.python.data import StdoutDataSink  # noqa
+from beat.backend.python.data import load_data_index  # noqa
+from beat.backend.python.data import load_data_index_db  # noqa
+from beat.backend.python.data import foundSplitRanges  # noqa
diff --git a/beat/core/data_loaders.py b/beat/core/data_loaders.py
index eabf4f6b4c542e25c8215bbe75f17d390c9ccc00..aa83e8dd56bfbba666187afcc5810358d57114ab 100644
--- a/beat/core/data_loaders.py
+++ b/beat/core/data_loaders.py
@@ -46,6 +46,6 @@ Forward importing from :py:mod:`beat.backend.python.data_loaders`
 """
 
 
-from beat.backend.python.data_loaders import DataLoaderList
-from beat.backend.python.data_loaders import DataLoader
-from beat.backend.python.data_loaders import DataView
+from beat.backend.python.data_loaders import DataLoaderList  # noqa
+from beat.backend.python.data_loaders import DataLoader  # noqa
+from beat.backend.python.data_loaders import DataView  # noqa
diff --git a/beat/core/dataformat.py b/beat/core/dataformat.py
index e599593855ba024e5faf9f9359a3435d561333bc..154489f6e3d2017d8fefb0efc9bb19f135b7e438 100644
--- a/beat/core/dataformat.py
+++ b/beat/core/dataformat.py
@@ -56,7 +56,7 @@ from . import prototypes
 from . import utils
 from .baseformat import baseformat
 
-from beat.backend.python.dataformat import Storage
+from beat.backend.python.dataformat import Storage  # noqa
 from beat.backend.python.dataformat import DataFormat as BackendDataFormat
 
 
diff --git a/beat/core/hash.py b/beat/core/hash.py
index 84f40b6127cb92523a18d4a900acf86f293e9fc9..189c732e64bd65a0bfaf73584f8a4a746fa98141 100644
--- a/beat/core/hash.py
+++ b/beat/core/hash.py
@@ -48,8 +48,8 @@ import collections
 
 import simplejson
 
-from beat.backend.python.hash import *
-from beat.backend.python.hash import _sha256
+from beat.backend.python.hash import *  # noqa
+from beat.backend.python.hash import _sha256  # noqa
 from beat.backend.python.hash import _stringify
 from beat.backend.python.hash import _compact
 
diff --git a/beat/core/inputs.py b/beat/core/inputs.py
index aa12de6098e2128b5aa19b20cb5df9cbe06dd40d..be0eeb22c5ca3f7d19d5f730750c2e5f35e5e270 100644
--- a/beat/core/inputs.py
+++ b/beat/core/inputs.py
@@ -47,6 +47,6 @@ Forward imported from :py:mod:`beat.backend.python.inputs`:
 """
 
 
-from beat.backend.python.inputs import InputList
-from beat.backend.python.inputs import Input
-from beat.backend.python.inputs import InputGroup
+from beat.backend.python.inputs import InputList  # noqa
+from beat.backend.python.inputs import Input  # noqa
+from beat.backend.python.inputs import InputGroup  # noqa
diff --git a/beat/core/loader.py b/beat/core/loader.py
index 3a1e98baae2bf3169688b87b87aa2446d9584ad4..ac64feb62731cf212fee34a35388dd267600cb4f 100644
--- a/beat/core/loader.py
+++ b/beat/core/loader.py
@@ -43,4 +43,4 @@ Forward imports from :py:mod:`beat.backend.python.loader`
 """
 
 
-from beat.backend.python.loader import *
+from beat.backend.python.loader import *  # noqa
diff --git a/beat/core/outputs.py b/beat/core/outputs.py
index e87a728a5e1d352e6cd7db285beaa4022033b262..825136bee65ceddfeb9d90cad4bd0a6c6751d446 100644
--- a/beat/core/outputs.py
+++ b/beat/core/outputs.py
@@ -46,6 +46,6 @@ Forward imported from :py:mod:`beat.backend.python.outputs`:
 """
 
 
-from beat.backend.python.outputs import SynchronizationListener
-from beat.backend.python.outputs import Output
-from beat.backend.python.outputs import OutputList
+from beat.backend.python.outputs import SynchronizationListener  # noqa
+from beat.backend.python.outputs import Output  # noqa
+from beat.backend.python.outputs import OutputList  # noqa
diff --git a/beat/core/stats.py b/beat/core/stats.py
index 89265b8edde279ababce999ba66a745f582bdf1e..c32021e836fca0fef9b36ec4355092049f7921b6 100644
--- a/beat/core/stats.py
+++ b/beat/core/stats.py
@@ -55,8 +55,8 @@ import simplejson
 from . import schema
 from . import prototypes
 
-from beat.backend.python.stats import io_statistics
-from beat.backend.python.stats import update
+from beat.backend.python.stats import io_statistics  # noqa
+from beat.backend.python.stats import update  # noqa
 
 
 class Statistics(object):