diff --git a/devel/fields.py b/devel/fields.py
index 289862fc..9bd64879 100644
--- a/devel/fields.py
+++ b/devel/fields.py
@@ -4,14 +4,14 @@
 
 class PGPKeyField(models.CharField):
     def __init__(self, *args, **kwargs):
-        super(PGPKeyField, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.validators.append(
             RegexValidator(r'^[0-9A-F]{40}$', "Ensure this value consists of 40 hex characters.", 'hex_char'))
 
     def to_python(self, value):
         if value == '' or value is None:
             return None
-        value = super(PGPKeyField, self).to_python(value)
+        value = super().to_python(value)
         # remove all spaces
         value = value.replace(' ', '')
         # prune prefixes, either 0x or 2048R/ type
diff --git a/devel/forms.py b/devel/forms.py
index 060b2f2c..99e2fbc3 100644
--- a/devel/forms.py
+++ b/devel/forms.py
@@ -60,7 +60,7 @@ class Meta:
         exclude = ('picture', 'user')
 
     def __init__(self, *args, **kwargs):
-        super(NewUserForm, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         # Hack ourself so certain fields appear first
         old = self.fields
         self.fields = OrderedDict()
@@ -79,7 +79,7 @@ def clean_username(self):
         return username
 
     def save(self, commit=True):
-        profile = super(NewUserForm, self).save(commit=False)
+        profile = super().save(commit=False)
         pwletters = ascii_letters + digits
         password = ''.join([random.choice(pwletters) for _ in range(8)])
         user = User.objects.create_user(
diff --git a/feeds.py b/feeds.py
index d6fe1f7a..dff07836 100644
--- a/feeds.py
+++ b/feeds.py
@@ -43,7 +43,7 @@ def write(self, outfile, encoding):
         '>' closing tags and over 1600 write calls in our package feed.
         '''
         wrapper = BatchWritesWrapper(outfile)
-        super(FasterRssFeed, self).write(wrapper, encoding)
+        super().write(wrapper, encoding)
         wrapper.flush()
 
 
@@ -61,7 +61,7 @@ class PackageFeed(Feed):
 
     def __call__(self, request, *args, **kwargs):
         wrapper = condition(last_modified_func=package_last_modified)
-        return wrapper(super(PackageFeed, self).__call__)(request, *args, **kwargs)
+        return wrapper(super().__call__)(request, *args, **kwargs)
 
     __name__ = 'package_feed'
 
@@ -183,7 +183,7 @@ class PackageUpdatesFeed(Feed):
 
     def __call__(self, request, *args, **kwargs):
         wrapper = condition(last_modified_func=removal_last_modified)
-        return wrapper(super(PackageUpdatesFeed, self).__call__)(request, *args, **kwargs)
+        return wrapper(super().__call__)(request, *args, **kwargs)
 
     __name__ = 'packages_updates_feed'
 
@@ -318,7 +318,7 @@ class NewsFeed(Feed):
 
     def __call__(self, request, *args, **kwargs):
         wrapper = condition(last_modified_func=news_last_modified)
-        return wrapper(super(NewsFeed, self).__call__)(request, *args, **kwargs)
+        return wrapper(super().__call__)(request, *args, **kwargs)
 
     __name__ = 'news_feed'
 
@@ -405,7 +405,7 @@ class PlanetFeed(Feed):
 
     def __call__(self, request, *args, **kwargs):
         wrapper = condition(last_modified_func=planet_last_modified)
-        return wrapper(super(PlanetFeed, self).__call__)(request, *args, **kwargs)
+        return wrapper(super().__call__)(request, *args, **kwargs)
 
     __name__ = 'planet_feed'
 
diff --git a/main/log.py b/main/log.py
index bb756b67..de6b0037 100644
--- a/main/log.py
+++ b/main/log.py
@@ -12,14 +12,14 @@ def __init__(self, *args, **kwargs):
             self.size_limit = None
         if self.size_limit and self.size_limit < 0:
             raise Exception('Invalid size specified')
-        super(LimitedSizeDict, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.check_item_limits()
 
     def __setitem__(self, key, value):
         # delete and add to ensure it ends up at the end of the linked list
         if key in self:
-            super(LimitedSizeDict, self).__delitem__(key)
-        super(LimitedSizeDict, self).__setitem__(key, value)
+            super().__delitem__(key)
+        super().__setitem__(key, value)
         self.check_item_limits()
 
     def check_item_limits(self):
diff --git a/main/management/commands/donor_import.py b/main/management/commands/donor_import.py
index 18a9c059..a48725a1 100644
--- a/main/management/commands/donor_import.py
+++ b/main/management/commands/donor_import.py
@@ -18,7 +18,6 @@
 import email
 import logging
 import sys
-from argparse import FileType
 from email.header import decode_header
 
 from django.core.management.base import BaseCommand, CommandError
@@ -33,7 +32,7 @@
 
 class Command(BaseCommand):
     def add_arguments(self, parser):
-        parser.add_argument('input', nargs='?', type=FileType('r'), default=sys.stdin)
+        parser.add_argument('input', nargs='?', default=None, help='Input file (default: stdin)')
 
     def decode_subject(self, subject):
         subject = decode_header(subject)
@@ -78,7 +77,12 @@ def handle(self, *args, **options):
         elif v >= 2:
             logger.level = logging.DEBUG
 
-        msg = email.message_from_file(options['input'])
+        input_path = options['input']
+        if input_path is not None:
+            with open(input_path, 'r') as f:
+                msg = email.message_from_file(f)
+        else:
+            msg = email.message_from_file(sys.stdin)
         if not msg['subject']:
             raise CommandError("Failed to read from STDIN")
         subject = msg.get('subject', '')
diff --git a/main/models.py b/main/models.py
index 86801e0e..eb4c59a1 100644
--- a/main/models.py
+++ b/main/models.py
@@ -122,7 +122,7 @@ def __str__(self):
     @property
     def full_version(self):
         if self.epoch > 0:
-            return '%d:%s-%s' % (self.epoch, self.pkgver, self.pkgrel)
+            return f'{self.epoch}:{self.pkgver}-{self.pkgrel}'
         return f'{self.pkgver}-{self.pkgrel}'
 
     def get_absolute_url(self):
diff --git a/main/storage.py b/main/storage.py
index a1f92cb5..d4abae75 100644
--- a/main/storage.py
+++ b/main/storage.py
@@ -16,8 +16,7 @@ class MinifiedStaticFilesStorage(ManifestStaticFilesStorage):
     )
 
     def post_process(self, paths, dry_run=False, **options):
-        for original_path, processed_path, processed in super(
-                MinifiedStaticFilesStorage, self).post_process(
+        for original_path, processed_path, processed in super().post_process(
                 paths, dry_run, **options):
             for ext, func in self.minifiers:
                 if '.min' in original_path:
diff --git a/main/tests/test_donor_import.py b/main/tests/test_donor_import.py
index 17e52f64..151a972a 100644
--- a/main/tests/test_donor_import.py
+++ b/main/tests/test_donor_import.py
@@ -42,9 +42,9 @@ def test_invalid_args(monkeypatch):
 
 
 def test_invalid_path():
-    with pytest.raises(CommandError) as e:
+    with pytest.raises(FileNotFoundError) as e:
         call_command('donor_import', '/tmp/non-existant')
-    assert 'argument input: can\'t open' in str(e.value)
+    assert 'No such file or directory' in str(e.value)
 
 
 def test_maildir(db, monkeypatch):
diff --git a/mirrors/fields.py b/mirrors/fields.py
index cb1c3893..118b7686 100644
--- a/mirrors/fields.py
+++ b/mirrors/fields.py
@@ -21,7 +21,7 @@ class IPNetworkField(models.Field):
 
     def __init__(self, *args, **kwargs):
         kwargs['max_length'] = 44
-        super(IPNetworkField, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
     def get_internal_type(self):
         return "IPAddressField"
@@ -40,7 +40,7 @@ def get_prep_value(self, value):
     def formfield(self, **kwargs):
         defaults = {'form_class': IPNetworkFormField}
         defaults.update(kwargs)
-        return super(IPNetworkField, self).formfield(**defaults)
+        return super().formfield(**defaults)
 
     def from_db_value(self, value, expression, connection):
         return self.to_python(value)
diff --git a/mirrors/views/api.py b/mirrors/views/api.py
index 900c72b4..b0a81b71 100644
--- a/mirrors/views/api.py
+++ b/mirrors/views/api.py
@@ -33,7 +33,7 @@ def default(self, obj):
             return data
         if isinstance(obj, MirrorProtocol):
             return str(obj)
-        return super(MirrorStatusJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 
 class ExtendedMirrorStatusJSONEncoder(MirrorStatusJSONEncoder):
@@ -43,7 +43,7 @@ class ExtendedMirrorStatusJSONEncoder(MirrorStatusJSONEncoder):
 
     def default(self, obj):
         if isinstance(obj, MirrorUrl):
-            data = super(ExtendedMirrorStatusJSONEncoder, self).default(obj)
+            data = super().default(obj)
             cutoff = now() - DEFAULT_CUTOFF
             data['logs'] = list(obj.logs.filter(
                 check_time__gte=cutoff).order_by('check_time'))
@@ -52,7 +52,7 @@ def default(self, obj):
             data = {attr: getattr(obj, attr) for attr in self.log_attributes}
             data['error'] = obj.error or None
             return data
-        return super(ExtendedMirrorStatusJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 
 class LocationJSONEncoder(DjangoJSONEncoder):
@@ -68,7 +68,7 @@ def default(self, obj):
                 'country_code': obj.country.code,
                 'ip_version': obj.ip_version,
             }
-        return super(LocationJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 
 @cache_control(max_age=311)
diff --git a/mirrors/views/mirrorlist.py b/mirrors/views/mirrorlist.py
index 92b4241a..1fb4e48b 100644
--- a/mirrors/views/mirrorlist.py
+++ b/mirrors/views/mirrorlist.py
@@ -21,7 +21,7 @@ class MirrorlistForm(forms.Form):
     use_mirror_status = forms.BooleanField(required=False)
 
     def __init__(self, *args, **kwargs):
-        super(MirrorlistForm, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         fields = self.fields
         fields['country'].choices = [('all', 'All'), *self.get_countries()]
         fields['country'].initial = ['all']
diff --git a/news/views.py b/news/views.py
index 33ad1aa5..a8009427 100644
--- a/news/views.py
+++ b/news/views.py
@@ -62,7 +62,7 @@ def form_valid(self, form):
                 from_email=from_,
                 to=[settings.ANNOUNCE_EMAIL],
                 headers=headers).send()
-        return super(NewsCreateView, self).form_valid(form)
+        return super().form_valid(form)
 
 
 class NewsEditView(UpdateView):
diff --git a/packages/admin.py b/packages/admin.py
index dee0140f..8a4ad6b7 100644
--- a/packages/admin.py
+++ b/packages/admin.py
@@ -33,7 +33,7 @@ class FlagRequestAdmin(admin.ModelAdmin):
     ordering = ('-created',)
 
     def get_queryset(self, request):
-        qs = super(FlagRequestAdmin, self).get_queryset(request)
+        qs = super().get_queryset(request)
         return qs.select_related('repo', 'user')
 
 
@@ -53,7 +53,7 @@ class SignoffSpecificationAdmin(admin.ModelAdmin):
     ordering = ('-created',)
 
     def get_queryset(self, request):
-        qs = super(SignoffSpecificationAdmin, self).get_queryset(request)
+        qs = super().get_queryset(request)
         return qs.select_related('arch', 'repo', 'user')
 
 
diff --git a/packages/models.py b/packages/models.py
index cd3c0801..61d70b3d 100644
--- a/packages/models.py
+++ b/packages/models.py
@@ -227,8 +227,8 @@ def __str__(self):
 class FlagDenylist(models.Model):
     keyword = models.CharField(max_length=255)
 
-    def __str__(self):
-        return f"{self.keyword}"
+    def __str__(self) -> str:
+        return str(self.keyword)
 
 
 class UpdateManager(models.Manager):
@@ -477,7 +477,7 @@ class Depend(RelatedToBase):
 
     def __str__(self):
         '''For depends, we may also have a description and a modifier.'''
-        to_str = super(Depend, self).__str__()
+        to_str = super().__str__()
         if self.description:
             return f'{to_str}: {self.description}'
         return to_str
diff --git a/packages/templatetags/package_extras.py b/packages/templatetags/package_extras.py
index be8f3bf6..15481125 100644
--- a/packages/templatetags/package_extras.py
+++ b/packages/templatetags/package_extras.py
@@ -9,7 +9,7 @@
 class BuildQueryStringNode(template.Node):
     def __init__(self, sortfield):
         self.sortfield = sortfield
-        super(BuildQueryStringNode, self).__init__()
+        super().__init__()
 
     def render(self, context):
         qs = parse_qs(context['current_query'])
diff --git a/packages/utils.py b/packages/utils.py
index e56deb9d..43a96cfb 100644
--- a/packages/utils.py
+++ b/packages/utils.py
@@ -466,6 +466,6 @@ def default(self, obj):
             for attr in self.todolistpackage_attributes:
                 data[attr] = getattr(obj, attr)
             return data
-        return super(PackageJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 # vim: set ts=4 sw=4 et:
diff --git a/packages/views/flag.py b/packages/views/flag.py
index 67b2c27d..a5cdf67e 100644
--- a/packages/views/flag.py
+++ b/packages/views/flag.py
@@ -29,7 +29,7 @@ def __init__(self, *args, **kwargs):
         # we remove the 'email' field if this form is being shown to a
         # logged-in user, e.g., a developer.
         auth = kwargs.pop('authenticated', False)
-        super(FlagForm, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         if auth:
             del self.fields['email']
 
diff --git a/packages/views/search.py b/packages/views/search.py
index a795ecc0..b9d383d2 100644
--- a/packages/views/search.py
+++ b/packages/views/search.py
@@ -28,7 +28,7 @@ class GroupSearchForm(forms.Form):
 
     def __init__(self, *args, **kwargs):
         show_staging = kwargs.pop('show_staging', False)
-        super(GroupSearchForm, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
         repos = Repo.objects.all()
 
@@ -59,7 +59,7 @@ class PackageSearchForm(forms.Form):
 
     def __init__(self, *args, **kwargs):
         show_staging = kwargs.pop('show_staging', False)
-        super(PackageSearchForm, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         repos = Repo.objects.all()
         if not show_staging:
             repos = repos.filter(staging=False)
@@ -153,7 +153,7 @@ def get(self, request, *args, **kwargs):
             return empty_response()
         self.form = PackageSearchForm(data=request.GET,
                                       show_staging=self.request.user.is_authenticated)
-        return super(SearchListView, self).get(request, *args, **kwargs)
+        return super().get(request, *args, **kwargs)
 
     def get_queryset(self):
         packages = Package.objects.normal()
@@ -170,7 +170,7 @@ def get_queryset(self):
         return Package.objects.none()
 
     def get_context_data(self, **kwargs):
-        context = super(SearchListView, self).get_context_data(**kwargs)
+        context = super().get_context_data(**kwargs)
         query_params = self.request.GET.copy()
         query_params.pop('page', None)
         context['current_query'] = query_params.urlencode()
diff --git a/packages/views/signoff.py b/packages/views/signoff.py
index 3634a71d..7a05e699 100644
--- a/packages/views/signoff.py
+++ b/packages/views/signoff.py
@@ -198,7 +198,7 @@ def default(self, obj):
             return obj.username
         elif isinstance(obj, set):
             return list(obj)
-        return super(SignoffJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 
 @permission_required('packages.change_signoff')
diff --git a/pyproject.toml b/pyproject.toml
index 8430515c..ef628ddb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,6 +69,7 @@ select = [
     "T10",     # flake8-debugger
     "TCH",     # flake8-type-checking
     "UP032",   # f-string
+    "UP008",   # super-call-with-parameters
     "W",       # warnings (mostly whitespace)
     "YTT",     # flake8-2020
 ]
diff --git a/releng/views.py b/releng/views.py
index 2f7b933f..04849246 100644
--- a/releng/views.py
+++ b/releng/views.py
@@ -56,7 +56,7 @@ def default(self, obj):
                 torrent_data.pop('url_list', None)
             data['torrent'] = torrent_data
             return data
-        return super(ReleaseJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 
 def releases_json(request):
diff --git a/sitemaps.py b/sitemaps.py
index 9546a9e1..7039d807 100644
--- a/sitemaps.py
+++ b/sitemaps.py
@@ -81,7 +81,7 @@ def get_latest_lastmod(self):
         return None
 
     def location(self, obj):
-        return f"/packages/{obj['repo'].name.lower()}/{obj['arch']}/obj['pkgbase']/"
+        return f"/packages/{obj['repo'].name.lower()}/{obj['arch']}/{obj['pkgbase']}/"
 
 
 class NewsSitemap(Sitemap):
@@ -116,7 +116,7 @@ class RecentNewsSitemap(NewsSitemap):
     def items(self):
         now = datetime.now(timezone.utc)
         cutoff = now - timedelta(days=30)
-        return super(RecentNewsSitemap, self).items().filter(postdate__gte=cutoff)
+        return super().items().filter(postdate__gte=cutoff)
 
 
 class ReleasesSitemap(Sitemap):
diff --git a/todolists/views.py b/todolists/views.py
index 84f4785b..f0401354 100644
--- a/todolists/views.py
+++ b/todolists/views.py
@@ -241,7 +241,7 @@ def default(self, obj):
                 'kind': obj.kind_str
             }
 
-        return super(TodoListJSONEncoder, self).default(obj)
+        return super().default(obj)
 
 
 def view_json(request, slug):
diff --git a/urls.py b/urls.py
index 7b36b0ca..58d7dc3b 100644
--- a/urls.py
+++ b/urls.py
@@ -115,7 +115,7 @@
     ])
 
 # prometheus metrics
-if settings.PROMETHEUS_METRICS:  # pragma :no cover
+if settings.PROMETHEUS_METRICS:  # pragma: no cover
     urlpatterns.extend([
         path('', include('django_prometheus.urls')),
     ])