diff --git a/searx/engines/bing_images.py b/searx/engines/bing_images.py
index 246d37a30..73b61b896 100644
--- a/searx/engines/bing_images.py
+++ b/searx/engines/bing_images.py
@@ -6,13 +6,13 @@
 from urllib.parse import urlencode
 from lxml import html
 from json import loads
-from searx.utils import match_language
 
+from searx.utils import match_language
 from searx.engines.bing import language_aliases
-from searx.engines.bing import (
+from searx.engines.bing import (  # pylint: disable=unused-import
     _fetch_supported_languages,
     supported_languages_url,
-)  # NOQA # pylint: disable=unused-import
+)
 
 # about
 about = {
@@ -34,7 +34,15 @@ number_of_results = 28
 
 # search-url
 base_url = 'https://www.bing.com/'
-search_string = 'images/search' '?{query}' '&count={count}' '&first={first}' '&tsc=ImageHoverTitle'
+search_string = (
+    # fmt: off
+    'images/search'
+    '?{query}'
+    '&count={count}'
+    '&first={first}'
+    '&tsc=ImageHoverTitle'
+    # fmt: on
+)
 time_range_string = '&qft=+filterui:age-lt{interval}'
 time_range_dict = {'day': '1440', 'week': '10080', 'month': '43200', 'year': '525600'}
 
diff --git a/searx/engines/bing_videos.py b/searx/engines/bing_videos.py
index ad61724a1..7f8820546 100644
--- a/searx/engines/bing_videos.py
+++ b/searx/engines/bing_videos.py
@@ -6,15 +6,15 @@
 from json import loads
 from lxml import html
 from urllib.parse import urlencode
-from searx.utils import match_language
 
+from searx.utils import match_language
 from searx.engines.bing import language_aliases
-from searx.engines.bing import (
+
+from searx.engines.bing import (  # pylint: disable=unused-import
     _fetch_supported_languages,
     supported_languages_url,
-)  # NOQA # pylint: disable=unused-import
+)
 
-# about
 about = {
     "website": 'https://www.bing.com/videos',
     "wikidata_id": 'Q4914152',
@@ -31,7 +31,16 @@ time_range_support = True
 number_of_results = 28
 
 base_url = 'https://www.bing.com/'
-search_string = 'videos/search' '?{query}' '&count={count}' '&first={first}' '&scope=video' '&FORM=QBLH'
+search_string = (
+    # fmt: off
+    'videos/search'
+    '?{query}'
+    '&count={count}'
+    '&first={first}'
+    '&scope=video'
+    '&FORM=QBLH'
+    # fmt: on
+)
 time_range_string = '&qft=+filterui:videoage-lt{interval}'
 time_range_dict = {'day': '1440', 'week': '10080', 'month': '43200', 'year': '525600'}
 
diff --git a/searx/engines/doku.py b/searx/engines/doku.py
index e81131cce..08f56bbe7 100644
--- a/searx/engines/doku.py
+++ b/searx/engines/doku.py
@@ -25,9 +25,14 @@ number_of_results = 5
 # search-url
 # Doku is OpenSearch compatible
 base_url = 'http://localhost:8090'
-search_url = '/?do=search' '&{query}'
-# TODO             '&startRecord={offset}'\
-# TODO             '&maximumRecords={limit}'\
+search_url = (
+    # fmt: off
+    '/?do=search'
+    '&{query}'
+    # fmt: on
+)
+# TODO  '&startRecord={offset}'
+# TODO  '&maximumRecords={limit}'
 
 
 # do search-request
diff --git a/searx/engines/duckduckgo_definitions.py b/searx/engines/duckduckgo_definitions.py
index d4e813c2b..ad3c92169 100644
--- a/searx/engines/duckduckgo_definitions.py
+++ b/searx/engines/duckduckgo_definitions.py
@@ -10,10 +10,10 @@ from lxml import html
 
 from searx.data import WIKIDATA_UNITS
 from searx.engines.duckduckgo import language_aliases
-from searx.engines.duckduckgo import (
+from searx.engines.duckduckgo import (  # pylint: disable=unused-import
     _fetch_supported_languages,
     supported_languages_url,
-)  # NOQA # pylint: disable=unused-import
+)
 from searx.utils import extract_text, html_to_text, match_language, get_string_replaces_function
 from searx.external_urls import get_external_url, get_earth_coordinates_url, area_to_osm_zoom
 
diff --git a/searx/engines/duckduckgo_images.py b/searx/engines/duckduckgo_images.py
index 21e24d2c9..2f75e16f1 100644
--- a/searx/engines/duckduckgo_images.py
+++ b/searx/engines/duckduckgo_images.py
@@ -7,10 +7,10 @@ from json import loads
 from urllib.parse import urlencode
 from searx.exceptions import SearxEngineAPIException
 from searx.engines.duckduckgo import get_region_code
-from searx.engines.duckduckgo import (
+from searx.engines.duckduckgo import (  # pylint: disable=unused-import
     _fetch_supported_languages,
     supported_languages_url,
-)  # NOQA # pylint: disable=unused-import
+)
 from searx.network import get
 
 # about
diff --git a/searx/engines/etools.py b/searx/engines/etools.py
index c66ceeb4b..347463291 100644
--- a/searx/engines/etools.py
+++ b/searx/engines/etools.py
@@ -22,7 +22,14 @@ paging = False
 safesearch = True
 
 base_url = 'https://www.etools.ch'
-search_path = '/searchAdvancedSubmit.do' '?query={search_term}' '&pageResults=20' '&safeSearch={safesearch}'
+search_path = (
+    # fmt: off
+    '/searchAdvancedSubmit.do'
+    '?query={search_term}'
+    '&pageResults=20'
+    '&safeSearch={safesearch}'
+    # fmt: on
+)
 
 
 def request(query, params):
diff --git a/searx/engines/wikidata.py b/searx/engines/wikidata.py
index c8881d299..e5d3f55c0 100644
--- a/searx/engines/wikidata.py
+++ b/searx/engines/wikidata.py
@@ -14,10 +14,10 @@ from searx.data import WIKIDATA_UNITS
 from searx.network import post, get
 from searx.utils import match_language, searx_useragent, get_string_replaces_function
 from searx.external_urls import get_external_url, get_earth_coordinates_url, area_to_osm_zoom
-from searx.engines.wikipedia import (
+from searx.engines.wikipedia import (  # pylint: disable=unused-import
     _fetch_supported_languages,
     supported_languages_url,
-)  # NOQA # pylint: disable=unused-import
+)
 
 # about
 about = {
diff --git a/searx/engines/yahoo_news.py b/searx/engines/yahoo_news.py
index 06f090f74..00f208b17 100644
--- a/searx/engines/yahoo_news.py
+++ b/searx/engines/yahoo_news.py
@@ -39,7 +39,12 @@ paging = True
 categories = ['news']
 
 # search-url
-search_url = 'https://news.search.yahoo.com/search' '?{query}&b={offset}'
+search_url = (
+    # fmt: off
+    'https://news.search.yahoo.com/search'
+    '?{query}&b={offset}'
+    # fmt: on
+)
 
 AGO_RE = re.compile(r'([0-9]+)\s*(year|month|week|day|minute|hour)')
 AGO_TIMEDELTA = {
diff --git a/tests/unit/test_webutils.py b/tests/unit/test_webutils.py
index 8bb3a0447..2b7c6fe5a 100644
--- a/tests/unit/test_webutils.py
+++ b/tests/unit/test_webutils.py
@@ -22,7 +22,7 @@ class TestWebUtils(SearxTestCase):
         self.assertEqual(webutils.highlight_content('', None), None)
         self.assertEqual(webutils.highlight_content(False, None), None)
 
-        contents = ['<html></html>' 'not<']
+        contents = ['<html></html>not<']
         for content in contents:
             self.assertEqual(webutils.highlight_content(content, None), content)