diff --git a/test/test_cache.py b/test/test_cache.py
index 31ece7e9..e19896e9 100644
--- a/test/test_cache.py
+++ b/test/test_cache.py
@@ -7,14 +7,19 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
+import os
+import sys
 import unittest
-import tempfile
+
 import time
+import tempfile
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import config, util  # noqa E402
 
-from gallery_dl import config, util
 dbpath = tempfile.mkstemp()[1]
 config.set(("cache",), "file", dbpath)
-from gallery_dl import cache  # noqa
+from gallery_dl import cache  # noqa E402
 
 
 def tearDownModule():
diff --git a/test/test_config.py b/test/test_config.py
index 57679eab..cb202be2 100644
--- a/test/test_config.py
+++ b/test/test_config.py
@@ -7,12 +7,16 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
-import unittest
-import gallery_dl.config as config
 import os
+import sys
+import unittest
+
 import json
 import tempfile
 
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import config  # noqa E402
+
 
 class TestConfig(unittest.TestCase):
 
diff --git a/test/test_cookies.py b/test/test_cookies.py
index c39a5e65..f6919804 100644
--- a/test/test_cookies.py
+++ b/test/test_cookies.py
@@ -7,6 +7,8 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
+import os
+import sys
 import unittest
 from unittest import mock
 
@@ -14,8 +16,8 @@ import logging
 import tempfile
 from os.path import join
 
-import gallery_dl.config as config
-import gallery_dl.extractor as extractor
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import config, extractor  # noqa E402
 
 
 class TestCookiejar(unittest.TestCase):
diff --git a/test/test_downloader.py b/test/test_downloader.py
index c43b533d..9393040d 100644
--- a/test/test_downloader.py
+++ b/test/test_downloader.py
@@ -1,29 +1,28 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-# Copyright 2018 Mike Fährmann
+# Copyright 2018-2020 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
-import re
+import os
 import sys
+import unittest
+from unittest.mock import Mock, MagicMock, patch
+
+import re
 import base64
 import os.path
 import tempfile
 import threading
 import http.server
 
-import unittest
-from unittest.mock import Mock, MagicMock, patch
-
-import gallery_dl.downloader as downloader
-import gallery_dl.extractor as extractor
-import gallery_dl.config as config
-from gallery_dl.downloader.common import DownloaderBase
-from gallery_dl.output import NullOutput
-from gallery_dl.util import PathFormat
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import downloader, extractor, config, util  # noqa E402
+from gallery_dl.downloader.common import DownloaderBase  # noqa E402
+from gallery_dl.output import NullOutput  # noqa E402
 
 
 class MockDownloaderModule(Mock):
@@ -119,7 +118,7 @@ class TestDownloaderBase(unittest.TestCase):
             "filename": name,
             "extension": extension,
         }
-        pathfmt = PathFormat(cls.extractor)
+        pathfmt = util.PathFormat(cls.extractor)
         pathfmt.set_directory(kwdict)
         pathfmt.set_filename(kwdict)
 
diff --git a/test/test_extractor.py b/test/test_extractor.py
index e6f49632..043bd522 100644
--- a/test/test_extractor.py
+++ b/test/test_extractor.py
@@ -7,18 +7,20 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
+import os
 import sys
+import unittest
+from unittest.mock import patch
+
 import time
 import string
 from datetime import datetime, timedelta
 
-import unittest
-from unittest.mock import patch
-
-from gallery_dl import extractor
-from gallery_dl.extractor import mastodon
-from gallery_dl.extractor.common import Extractor, Message
-from gallery_dl.extractor.directlink import DirectlinkExtractor as DLExtractor
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import extractor  # noqa E402
+from gallery_dl.extractor import mastodon  # noqa E402
+from gallery_dl.extractor.common import Extractor, Message  # noqa E402
+from gallery_dl.extractor.directlink import DirectlinkExtractor  # noqa E402
 
 
 class FakeExtractor(Extractor):
@@ -78,7 +80,7 @@ class TestExtractorModule(unittest.TestCase):
         test_uri = "test:"
         fake_uri = "fake:"
 
-        self.assertIsInstance(extractor.find(link_uri), DLExtractor)
+        self.assertIsInstance(extractor.find(link_uri), DirectlinkExtractor)
         self.assertIsInstance(extractor.find(test_uri), Extractor)
         self.assertIsNone(extractor.find(fake_uri))
 
@@ -87,12 +89,12 @@ class TestExtractorModule(unittest.TestCase):
             self.assertIsInstance(extractor.find(test_uri), Extractor)
             self.assertIsNone(extractor.find(fake_uri))
 
-        with extractor.blacklist([], [DLExtractor, FakeExtractor]):
+        with extractor.blacklist([], [DirectlinkExtractor, FakeExtractor]):
             self.assertIsNone(extractor.find(link_uri))
             self.assertIsInstance(extractor.find(test_uri), Extractor)
             self.assertIsNone(extractor.find(fake_uri))
 
-        with extractor.blacklist(["test"], [DLExtractor]):
+        with extractor.blacklist(["test"], [DirectlinkExtractor]):
             self.assertIsNone(extractor.find(link_uri))
             self.assertIsNone(extractor.find(test_uri))
             self.assertIsNone(extractor.find(fake_uri))
@@ -127,7 +129,8 @@ class TestExtractorModule(unittest.TestCase):
             for extr2 in extractor._cache:
 
                 # skip DirectlinkExtractor pattern if it isn't tested
-                if extr1 != DLExtractor and extr2 == DLExtractor:
+                if extr1 != DirectlinkExtractor and \
+                        extr2 == DirectlinkExtractor:
                     continue
 
                 match = extr2.pattern.match(url)
diff --git a/test/test_oauth.py b/test/test_oauth.py
index 2ce5b431..58d4088c 100644
--- a/test/test_oauth.py
+++ b/test/test_oauth.py
@@ -1,15 +1,18 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-# Copyright 2018 Mike Fährmann
+# Copyright 2018-2020 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
+import os
+import sys
 import unittest
 
-from gallery_dl import oauth, text
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import oauth, text  # noqa E402
 
 TESTSERVER = "http://term.ie/oauth/example"
 CONSUMER_KEY = "key"
diff --git a/test/test_postprocessor.py b/test/test_postprocessor.py
index 629b0d7b..354f9ffe 100644
--- a/test/test_postprocessor.py
+++ b/test/test_postprocessor.py
@@ -1,23 +1,24 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-# Copyright 2019 Mike Fährmann
+# Copyright 2019-2020 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
 import os
-import os.path
+import sys
+import unittest
+from unittest.mock import Mock, mock_open, patch
+
 import zipfile
 import tempfile
 from datetime import datetime, timezone as tz
 
-import unittest
-from unittest.mock import Mock, mock_open, patch
-
-from gallery_dl import postprocessor, extractor, util, config
-from gallery_dl.postprocessor.common import PostProcessor
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import postprocessor, extractor, util, config  # noqa E402
+from gallery_dl.postprocessor.common import PostProcessor  # noqa E402
 
 
 class MockPostprocessorModule(Mock):
diff --git a/test/test_results.py b/test/test_results.py
index bfed2ca9..046efc5f 100644
--- a/test/test_results.py
+++ b/test/test_results.py
@@ -9,12 +9,15 @@
 
 import os
 import sys
+import unittest
+
 import re
 import json
 import hashlib
 import datetime
-import unittest
-from gallery_dl import extractor, util, job, config, exception
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import extractor, util, job, config, exception  # noqa E402
 
 
 # these don't work on Travis CI
diff --git a/test/test_text.py b/test/test_text.py
index 03908236..4f31d81c 100644
--- a/test/test_text.py
+++ b/test/test_text.py
@@ -7,10 +7,14 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
+import os
+import sys
 import unittest
+
 import datetime
 
-from gallery_dl import text
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import text  # noqa E402
 
 
 INVALID = ((), [], {}, None, 1, 2.3)
diff --git a/test/test_util.py b/test/test_util.py
index ffabd373..5fbaa4e1 100644
--- a/test/test_util.py
+++ b/test/test_util.py
@@ -7,14 +7,17 @@
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.
 
-import unittest
+import os
 import sys
+import unittest
+
 import io
 import random
 import string
 import http.cookiejar
 
-from gallery_dl import util, text, exception
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+from gallery_dl import util, text, exception  # noqa E402
 
 
 class TestRange(unittest.TestCase):