diff --git a/docs/conf.py b/docs/conf.py
index 10cdc91..4b2c93b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -20,7 +20,7 @@ copyright = "2014-{}, Markus Unterwaditzer & contributors".format(
 release = get_distribution("vdirsyncer").version
 version = ".".join(release.split(".")[:2])  # The short X.Y version.
 
-rst_epilog = ".. |vdirsyncer_version| replace:: %s" % release
+rst_epilog = f".. |vdirsyncer_version| replace:: {release}"
 
 exclude_patterns = ["_build"]
 
diff --git a/tests/storage/__init__.py b/tests/storage/__init__.py
index 0f11930..53c2bb4 100644
--- a/tests/storage/__init__.py
+++ b/tests/storage/__init__.py
@@ -10,16 +10,15 @@ import aiostream
 import pytest
 import pytest_asyncio
 
+from tests import EVENT_TEMPLATE
+from tests import TASK_TEMPLATE
+from tests import VCARD_TEMPLATE
+from tests import assert_item_equals
+from tests import normalize_item
 from vdirsyncer import exceptions
 from vdirsyncer.storage.base import normalize_meta_value
 from vdirsyncer.vobject import Item
 
-from .. import EVENT_TEMPLATE
-from .. import TASK_TEMPLATE
-from .. import VCARD_TEMPLATE
-from .. import assert_item_equals
-from .. import normalize_item
-
 
 def get_server_mixin(server_name):
     from . import __name__ as base
diff --git a/tests/storage/dav/__init__.py b/tests/storage/dav/__init__.py
index 912530e..f49362f 100644
--- a/tests/storage/dav/__init__.py
+++ b/tests/storage/dav/__init__.py
@@ -8,12 +8,11 @@ import aiostream
 import pytest
 
 from tests import assert_item_equals
+from tests.storage import StorageTests
+from tests.storage import get_server_mixin
 from vdirsyncer import exceptions
 from vdirsyncer.vobject import Item
 
-from .. import StorageTests
-from .. import get_server_mixin
-
 dav_server = os.environ.get("DAV_SERVER", "skip")
 ServerMixin = get_server_mixin(dav_server)
 
diff --git a/tests/storage/dav/test_caldav.py b/tests/storage/dav/test_caldav.py
index 656c7b4..ef534a0 100644
--- a/tests/storage/dav/test_caldav.py
+++ b/tests/storage/dav/test_caldav.py
@@ -11,10 +11,10 @@ from aioresponses import aioresponses
 from tests import EVENT_TEMPLATE
 from tests import TASK_TEMPLATE
 from tests import VCARD_TEMPLATE
+from tests.storage import format_item
 from vdirsyncer import exceptions
 from vdirsyncer.storage.dav import CalDAVStorage
 
-from .. import format_item
 from . import DAVStorageTests
 from . import dav_server
 
diff --git a/vdirsyncer/cli/__init__.py b/vdirsyncer/cli/__init__.py
index 0885429..defa178 100644
--- a/vdirsyncer/cli/__init__.py
+++ b/vdirsyncer/cli/__init__.py
@@ -10,8 +10,8 @@ import aiohttp
 import click
 import click_log
 
-from .. import BUGTRACKER_HOME
-from .. import __version__
+from vdirsyncer import BUGTRACKER_HOME
+from vdirsyncer import __version__
 
 cli_logger = logging.getLogger(__name__)
 click_log.basic_config("vdirsyncer")
diff --git a/vdirsyncer/cli/config.py b/vdirsyncer/cli/config.py
index bbfec2c..ccc7bc6 100644
--- a/vdirsyncer/cli/config.py
+++ b/vdirsyncer/cli/config.py
@@ -8,13 +8,13 @@ from itertools import chain
 from typing import IO
 from typing import Any
 from typing import Generator
-from typing import Tuple
 
-from .. import PROJECT_HOME
-from .. import exceptions
-from ..utils import cached_property
-from ..utils import expand_path
-from ..vobject import Item
+from vdirsyncer import PROJECT_HOME
+from vdirsyncer import exceptions
+from vdirsyncer.utils import cached_property
+from vdirsyncer.utils import expand_path
+from vdirsyncer.vobject import Item
+
 from .fetchparams import expand_fetch_params
 from .utils import storage_class_from_config
 
@@ -232,7 +232,7 @@ class PairConfig:
         self.name_b: str = options.pop("b")
 
         self._partial_sync: str | None = options.pop("partial_sync", None)
-        self.metadata: str | Tuple[()] = options.pop("metadata", ())
+        self.metadata: str | tuple[()] = options.pop("metadata", ())
 
         self.conflict_resolution = self._process_conflict_resolution_param(
             options.pop("conflict_resolution", None)
@@ -338,7 +338,7 @@ def _resolve_conflict_via_command(
     if _check_call is None:
         from subprocess import check_call as _check_call
 
-    from ..vobject import Item
+    from vdirsyncer.vobject import Item
 
     dir = tempfile.mkdtemp(prefix="vdirsyncer-conflict.")
     try:
diff --git a/vdirsyncer/cli/discover.py b/vdirsyncer/cli/discover.py
index 62495a7..52b132f 100644
--- a/vdirsyncer/cli/discover.py
+++ b/vdirsyncer/cli/discover.py
@@ -9,7 +9,8 @@ import sys
 import aiohttp
 import aiostream
 
-from .. import exceptions
+from vdirsyncer import exceptions
+
 from .utils import handle_collection_not_found
 from .utils import handle_storage_init_error
 from .utils import load_status
diff --git a/vdirsyncer/cli/fetchparams.py b/vdirsyncer/cli/fetchparams.py
index 87a483a..79e9c98 100644
--- a/vdirsyncer/cli/fetchparams.py
+++ b/vdirsyncer/cli/fetchparams.py
@@ -4,9 +4,10 @@ import logging
 
 import click
 
-from .. import exceptions
-from ..utils import expand_path
-from ..utils import synchronized
+from vdirsyncer import exceptions
+from vdirsyncer.utils import expand_path
+from vdirsyncer.utils import synchronized
+
 from . import AppContext
 
 SUFFIX = ".fetch"
diff --git a/vdirsyncer/cli/tasks.py b/vdirsyncer/cli/tasks.py
index 6e8f5ba..7ab1c0b 100644
--- a/vdirsyncer/cli/tasks.py
+++ b/vdirsyncer/cli/tasks.py
@@ -4,8 +4,9 @@ import json
 
 import aiohttp
 
-from .. import exceptions
-from .. import sync
+from vdirsyncer import exceptions
+from vdirsyncer import sync
+
 from .config import CollectionConfig
 from .discover import DiscoverResult
 from .discover import collections_for_pair
@@ -35,10 +36,8 @@ async def prepare_pair(pair_name, collections, config, *, connector):
             config_a, config_b = all_collections[collection_name]
         except KeyError:
             raise exceptions.UserError(
-                "Pair {}: Collection {} not found. These are the "
-                "configured collections:\n{}".format(
-                    pair_name, json.dumps(collection_name), list(all_collections)
-                )
+                f"Pair {pair_name}: Collection {json.dumps(collection_name)} not found. These are the "
+                f"configured collections:\n{list(all_collections)}"
             )
 
         collection = CollectionConfig(pair, collection_name, config_a, config_b)
@@ -105,7 +104,7 @@ async def repair_collection(
     *,
     connector: aiohttp.TCPConnector,
 ):
-    from ..repair import repair_storage
+    from vdirsyncer.repair import repair_storage
 
     storage_name, collection = collection, None
     if "/" in storage_name:
@@ -136,7 +135,7 @@ async def repair_collection(
 
 
 async def metasync_collection(collection, general, *, connector: aiohttp.TCPConnector):
-    from ..metasync import metasync
+    from vdirsyncer.metasync import metasync
 
     pair = collection.pair
     status_name = get_status_name(pair.name, collection.name)
diff --git a/vdirsyncer/cli/utils.py b/vdirsyncer/cli/utils.py
index 8fa51ee..51b2991 100644
--- a/vdirsyncer/cli/utils.py
+++ b/vdirsyncer/cli/utils.py
@@ -11,18 +11,19 @@ from typing import Any
 import aiohttp
 import click
 
-from .. import BUGTRACKER_HOME
-from .. import DOCS_HOME
-from .. import exceptions
-from ..storage.base import Storage
-from ..sync.exceptions import IdentConflict
-from ..sync.exceptions import PartialSync
-from ..sync.exceptions import StorageEmpty
-from ..sync.exceptions import SyncConflict
-from ..sync.status import SqliteStatus
-from ..utils import atomic_write
-from ..utils import expand_path
-from ..utils import get_storage_init_args
+from vdirsyncer import BUGTRACKER_HOME
+from vdirsyncer import DOCS_HOME
+from vdirsyncer import exceptions
+from vdirsyncer.storage.base import Storage
+from vdirsyncer.sync.exceptions import IdentConflict
+from vdirsyncer.sync.exceptions import PartialSync
+from vdirsyncer.sync.exceptions import StorageEmpty
+from vdirsyncer.sync.exceptions import SyncConflict
+from vdirsyncer.sync.status import SqliteStatus
+from vdirsyncer.utils import atomic_write
+from vdirsyncer.utils import expand_path
+from vdirsyncer.utils import get_storage_init_args
+
 from . import cli_logger
 
 STATUS_PERMISSIONS = 0o600
@@ -78,13 +79,11 @@ def handle_cli_error(status_name=None, e=None):
         cli_logger.critical(e)
     except StorageEmpty as e:
         cli_logger.error(
-            '{status_name}: Storage "{name}" was completely emptied. If you '
+            f'{status_name}: Storage "{e.empty_storage.instance_name}" was completely emptied. If you '
             "want to delete ALL entries on BOTH sides, then use "
-            "`vdirsyncer sync --force-delete {status_name}`. "
-            "Otherwise delete the files for {status_name} in your status "
-            "directory.".format(
-                name=e.empty_storage.instance_name, status_name=status_name
-            )
+            f"`vdirsyncer sync --force-delete {status_name}`. "
+            f"Otherwise delete the files for {status_name} in your status "
+            "directory."
         )
     except PartialSync as e:
         cli_logger.error(
diff --git a/vdirsyncer/storage/base.py b/vdirsyncer/storage/base.py
index fcbc379..38cb188 100644
--- a/vdirsyncer/storage/base.py
+++ b/vdirsyncer/storage/base.py
@@ -6,11 +6,10 @@ from abc import ABCMeta
 from abc import abstractmethod
 from typing import Iterable
 
+from vdirsyncer import exceptions
+from vdirsyncer.utils import uniq
 from vdirsyncer.vobject import Item
 
-from .. import exceptions
-from ..utils import uniq
-
 
 def mutating_storage_method(f):
     """Wrap a method and fail if the instance is readonly."""
@@ -141,10 +140,7 @@ class Storage(metaclass=StorageMeta):
         except ValueError:
             pass
 
-        return "<{}(**{})>".format(
-            self.__class__.__name__,
-            {x: getattr(self, x) for x in self._repr_attributes},
-        )
+        return f"<{self.__class__.__name__}(**{ ({x: getattr(self, x) for x in self._repr_attributes}) })>"
 
     @abstractmethod
     async def list(self) -> list[tuple]:
diff --git a/vdirsyncer/storage/dav.py b/vdirsyncer/storage/dav.py
index 6546322..4defb47 100644
--- a/vdirsyncer/storage/dav.py
+++ b/vdirsyncer/storage/dav.py
@@ -11,16 +11,16 @@ from inspect import signature
 import aiohttp
 import aiostream
 
+from vdirsyncer import exceptions
+from vdirsyncer import http
+from vdirsyncer import utils
 from vdirsyncer.exceptions import Error
+from vdirsyncer.http import USERAGENT
+from vdirsyncer.http import prepare_auth
+from vdirsyncer.http import prepare_client_cert
+from vdirsyncer.http import prepare_verify
 from vdirsyncer.vobject import Item
 
-from .. import exceptions
-from .. import http
-from .. import utils
-from ..http import USERAGENT
-from ..http import prepare_auth
-from ..http import prepare_client_cert
-from ..http import prepare_verify
 from .base import Storage
 from .base import normalize_meta_value
 
@@ -321,7 +321,7 @@ class Discover:
 
 class CalDiscover(Discover):
     _namespace = "urn:ietf:params:xml:ns:caldav"
-    _resourcetype = "{%s}calendar" % _namespace
+    _resourcetype = f"{{{_namespace}}}calendar"
     _homeset_xml = b"""
     <propfind xmlns="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">
         <prop>
@@ -329,13 +329,13 @@ class CalDiscover(Discover):
         </prop>
     </propfind>
     """
-    _homeset_tag = "{%s}calendar-home-set" % _namespace
+    _homeset_tag = f"{{{_namespace}}}calendar-home-set"
     _well_known_uri = "/.well-known/caldav"
 
 
 class CardDiscover(Discover):
     _namespace = "urn:ietf:params:xml:ns:carddav"
-    _resourcetype: str | None = "{%s}addressbook" % _namespace
+    _resourcetype: str | None = f"{{{_namespace}}}addressbook"
     _homeset_xml = b"""
     <propfind xmlns="DAV:" xmlns:c="urn:ietf:params:xml:ns:carddav">
         <prop>
@@ -343,7 +343,7 @@ class CardDiscover(Discover):
         </prop>
     </propfind>
     """
-    _homeset_tag = "{%s}addressbook-home-set" % _namespace
+    _homeset_tag = f"{{{_namespace}}}addressbook-home-set"
     _well_known_uri = "/.well-known/carddav"
 
 
diff --git a/vdirsyncer/storage/filesystem.py b/vdirsyncer/storage/filesystem.py
index 8785acc..bb91641 100644
--- a/vdirsyncer/storage/filesystem.py
+++ b/vdirsyncer/storage/filesystem.py
@@ -5,13 +5,14 @@ import logging
 import os
 import subprocess
 
-from .. import exceptions
-from ..utils import atomic_write
-from ..utils import checkdir
-from ..utils import expand_path
-from ..utils import generate_href
-from ..utils import get_etag_from_file
-from ..vobject import Item
+from vdirsyncer import exceptions
+from vdirsyncer.utils import atomic_write
+from vdirsyncer.utils import checkdir
+from vdirsyncer.utils import expand_path
+from vdirsyncer.utils import generate_href
+from vdirsyncer.utils import get_etag_from_file
+from vdirsyncer.vobject import Item
+
 from .base import Storage
 from .base import normalize_meta_value
 
diff --git a/vdirsyncer/storage/google.py b/vdirsyncer/storage/google.py
index 3109213..d7e44e0 100644
--- a/vdirsyncer/storage/google.py
+++ b/vdirsyncer/storage/google.py
@@ -12,11 +12,12 @@ from threading import Thread
 import aiohttp
 import click
 
-from .. import exceptions
-from ..utils import atomic_write
-from ..utils import checkdir
-from ..utils import expand_path
-from ..utils import open_graphical_browser
+from vdirsyncer import exceptions
+from vdirsyncer.utils import atomic_write
+from vdirsyncer.utils import checkdir
+from vdirsyncer.utils import expand_path
+from vdirsyncer.utils import open_graphical_browser
+
 from . import base
 from . import dav
 from .google_helpers import _RedirectWSGIApp
diff --git a/vdirsyncer/storage/http.py b/vdirsyncer/storage/http.py
index 9c4ce40..7ce891b 100644
--- a/vdirsyncer/storage/http.py
+++ b/vdirsyncer/storage/http.py
@@ -6,14 +6,15 @@ import urllib.parse as urlparse
 
 import aiohttp
 
-from .. import exceptions
-from ..http import USERAGENT
-from ..http import prepare_auth
-from ..http import prepare_client_cert
-from ..http import prepare_verify
-from ..http import request
-from ..vobject import Item
-from ..vobject import split_collection
+from vdirsyncer import exceptions
+from vdirsyncer.http import USERAGENT
+from vdirsyncer.http import prepare_auth
+from vdirsyncer.http import prepare_client_cert
+from vdirsyncer.http import prepare_verify
+from vdirsyncer.http import request
+from vdirsyncer.vobject import Item
+from vdirsyncer.vobject import split_collection
+
 from .base import Storage
 
 logger = logging.getLogger(__name__)
diff --git a/vdirsyncer/storage/memory.py b/vdirsyncer/storage/memory.py
index d872312..9a8b869 100644
--- a/vdirsyncer/storage/memory.py
+++ b/vdirsyncer/storage/memory.py
@@ -2,7 +2,8 @@ from __future__ import annotations
 
 import random
 
-from .. import exceptions
+from vdirsyncer import exceptions
+
 from .base import Storage
 from .base import normalize_meta_value
 
diff --git a/vdirsyncer/storage/singlefile.py b/vdirsyncer/storage/singlefile.py
index 405e7cb..5dafbcb 100644
--- a/vdirsyncer/storage/singlefile.py
+++ b/vdirsyncer/storage/singlefile.py
@@ -8,15 +8,16 @@ import logging
 import os
 from typing import Iterable
 
-from .. import exceptions
-from ..utils import atomic_write
-from ..utils import checkfile
-from ..utils import expand_path
-from ..utils import get_etag_from_file
-from ..utils import uniq
-from ..vobject import Item
-from ..vobject import join_collection
-from ..vobject import split_collection
+from vdirsyncer import exceptions
+from vdirsyncer.utils import atomic_write
+from vdirsyncer.utils import checkfile
+from vdirsyncer.utils import expand_path
+from vdirsyncer.utils import get_etag_from_file
+from vdirsyncer.utils import uniq
+from vdirsyncer.vobject import Item
+from vdirsyncer.vobject import join_collection
+from vdirsyncer.vobject import split_collection
+
 from .base import Storage
 
 logger = logging.getLogger(__name__)
diff --git a/vdirsyncer/sync/__init__.py b/vdirsyncer/sync/__init__.py
index 25b46a3..8b24219 100644
--- a/vdirsyncer/sync/__init__.py
+++ b/vdirsyncer/sync/__init__.py
@@ -16,11 +16,11 @@ import contextlib
 import itertools
 import logging
 
+from vdirsyncer.exceptions import UserError
 from vdirsyncer.storage.base import Storage
+from vdirsyncer.utils import uniq
 from vdirsyncer.vobject import Item
 
-from ..exceptions import UserError
-from ..utils import uniq
 from .exceptions import BothReadOnly
 from .exceptions import IdentAlreadyExists
 from .exceptions import PartialSync
diff --git a/vdirsyncer/sync/exceptions.py b/vdirsyncer/sync/exceptions.py
index 9fa5bf2..dfe5fbc 100644
--- a/vdirsyncer/sync/exceptions.py
+++ b/vdirsyncer/sync/exceptions.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from .. import exceptions
+from vdirsyncer import exceptions
 
 
 class SyncError(exceptions.Error):