diff --git a/sphinx/builders/linkcheck.py b/sphinx/builders/linkcheck.py
index 58c0a7835..a7853e92d 100644
--- a/sphinx/builders/linkcheck.py
+++ b/sphinx/builders/linkcheck.py
@@ -66,7 +66,7 @@ class CheckExternalLinksBuilder(DummyBuilder):
 
         output_text = path.join(self.outdir, 'output.txt')
         output_json = path.join(self.outdir, 'output.json')
-        with open(output_text, 'w', encoding='utf-8') as self.txt_outfile,\
+        with open(output_text, 'w', encoding='utf-8') as self.txt_outfile, \
              open(output_json, 'w', encoding='utf-8') as self.json_outfile:
             for result in checker.check(self.hyperlinks):
                 self.process_result(result)
diff --git a/tests/test_build_linkcheck.py b/tests/test_build_linkcheck.py
index 101635597..42e4e0352 100644
--- a/tests/test_build_linkcheck.py
+++ b/tests/test_build_linkcheck.py
@@ -782,7 +782,7 @@ def test_too_many_requests_retry_after_HTTP_date(app, capsys):
 
 @pytest.mark.sphinx('linkcheck', testroot='linkcheck-localserver', freshenv=True)
 def test_too_many_requests_retry_after_without_header(app, capsys):
-    with http_server(make_retry_after_handler([(429, None), (200, None)])),\
+    with http_server(make_retry_after_handler([(429, None), (200, None)])), \
          mock.patch("sphinx.builders.linkcheck.DEFAULT_DELAY", 0):
         app.build()
     content = (app.outdir / 'output.json').read_text(encoding='utf8')