diff --git a/docs/changelog.py b/docs/changelog.py
index fe2cad6..9a5ff74 100644
--- a/docs/changelog.py
+++ b/docs/changelog.py
@@ -54,7 +54,7 @@ A total of %d pull requests were merged for this release.
 
 def get_authors(revision_range):
     pat = '^.*\\t(.*)$'
-    lst_release, cur_release = [r.strip() for r in revision_range.split('..')]
+    lst_release, cur_release = (r.strip() for r in revision_range.split('..'))
 
     # authors, in current release and previous to current release.
     cur = set(re.findall(pat, this_repo.git.shortlog('-s', revision_range),
@@ -94,7 +94,7 @@ def get_pull_requests(repo, revision_range):
 
 
 def main(token, revision_range):
-    lst_release, cur_release = [r.strip() for r in revision_range.split('..')]
+    lst_release, cur_release = (r.strip() for r in revision_range.split('..'))
 
     github = Github(token)
     github_repo = github.get_repo('saimn/sigal')
diff --git a/sigal/__init__.py b/sigal/__init__.py
index acad34a..107527c 100644
--- a/sigal/__init__.py
+++ b/sigal/__init__.py
@@ -170,14 +170,14 @@ def build(source, destination, debug, verbose, quiet, force, config, theme,
                for subtype in ('skipped', 'failed')
                if stats[_type + '_' + subtype] > 0]
         opt = ' ({})'.format(', '.join(opt)) if opt else ''
-        return '{} {}s{}'.format(stats[_type], _type, opt)
+        return f'{stats[_type]} {_type}s{opt}'
 
     if not quiet:
         stats_str = ''
-        types = sorted(set(t.rsplit('_', 1)[0] for t in stats))
+        types = sorted({t.rsplit('_', 1)[0] for t in stats})
         for t in types[:-1]:
-            stats_str += '{} and '.format(format_stats(t))
-        stats_str += '{}'.format(format_stats(types[-1]))
+            stats_str += f'{format_stats(t)} and '
+        stats_str += f'{format_stats(types[-1])}'
         print('Done, processed {} in {:.2f} seconds.'
               .format(stats_str, time.time() - start_time))
 
@@ -278,4 +278,4 @@ def set_meta(target, keys, overwrite=False):
         for i in range(len(keys) // 2):
             k, v = keys[i * 2:(i + 1) * 2]
             fp.write(f"{k.capitalize()}: {v}\n")
-    print("{} metadata key(s) written to {}".format(len(keys) // 2, descfile))
+    print(f"{len(keys) // 2} metadata key(s) written to {descfile}")
diff --git a/sigal/gallery.py b/sigal/gallery.py
index 3b362a5..9ce6946 100644
--- a/sigal/gallery.py
+++ b/sigal/gallery.py
@@ -96,7 +96,7 @@ class Media:
         signals.media_initialized.send(self)
 
     def __repr__(self):
-        return "<{}>({!r})".format(self.__class__.__name__, str(self))
+        return f"<{self.__class__.__name__}>({str(self)!r})"
 
     def __str__(self):
         return join(self.path, self.src_filename)
diff --git a/sigal/log.py b/sigal/log.py
index 46078d8..386c5f3 100644
--- a/sigal/log.py
+++ b/sigal/log.py
@@ -25,8 +25,8 @@ from logging import Formatter
 
 # The background is set with 40 plus the number of the color, and the
 # foreground with 30
-BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = [30 + i
-                                                         for i in range(8)]
+BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = (30 + i
+                                                         for i in range(8))
 
 COLORS = {
     'DEBUG': BLUE,
diff --git a/sigal/video.py b/sigal/video.py
index 071ed6a..009645c 100644
--- a/sigal/video.py
+++ b/sigal/video.py
@@ -43,8 +43,7 @@ def check_subprocess(cmd, source, outname=None):
     """
     logger = logging.getLogger(__name__)
     try:
-        res = subprocess.run(cmd, stdout=subprocess.PIPE,
-                             stderr=subprocess.PIPE)
+        res = subprocess.run(cmd, capture_output=True)
     except KeyboardInterrupt:
         logger.debug('Process terminated, removing file %s', outname)
         if outname and os.path.isfile(outname):
diff --git a/tests/test_video.py b/tests/test_video.py
index 55a39be..e801682 100644
--- a/tests/test_video.py
+++ b/tests/test_video.py
@@ -101,7 +101,7 @@ def test_second_pass_video(mock_generate_video_pass, fmt, tmpdir):
     base, ext = os.path.splitext(TEST_VIDEO)
     dstfile = str(tmpdir.join(base + '.' + fmt))
     settings_1 = '-c:v libvpx-vp9 -b:v 0 -crf 30 -pass 1 -an -f null dev/null'
-    settings_2 = '-c:v libvpx-vp9 -b:v 0 -crf 30 -pass 2 -f {}'.format(fmt)
+    settings_2 = f'-c:v libvpx-vp9 -b:v 0 -crf 30 -pass 2 -f {fmt}'
     settings_opts = {'video_size': (100, 50), 'video_format': fmt,
                      fmt + '_options': settings_1.split(" "),
                      fmt + '_options_second_pass': settings_2.split(" ")}