diff --git a/vdirsyncer/cli/discover.py b/vdirsyncer/cli/discover.py
index 52b132f..e41cd6f 100644
--- a/vdirsyncer/cli/discover.py
+++ b/vdirsyncer/cli/discover.py
@@ -95,7 +95,7 @@ async def collections_for_pair(
 
     # We have to use a list here because the special None/null value would get
     # mangled to string (because JSON objects always have string keys).
-    rv = await aiostream.stream.list(
+    rv = await aiostream.stream.list(  #  type: ignore[assignment]
         expand_collections(
             shortcuts=pair.collections,
             config_a=pair.config_a,
diff --git a/vdirsyncer/cli/utils.py b/vdirsyncer/cli/utils.py
index 03755f3..2ff38d2 100644
--- a/vdirsyncer/cli/utils.py
+++ b/vdirsyncer/cli/utils.py
@@ -31,7 +31,7 @@ STATUS_DIR_PERMISSIONS = 0o700
 
 
 class _StorageIndex:
-    def __init__(self):
+    def __init__(self) -> None:
         self._storages: dict[str, str] = {
             "caldav": "vdirsyncer.storage.dav.CalDAVStorage",
             "carddav": "vdirsyncer.storage.dav.CardDAVStorage",
diff --git a/vdirsyncer/storage/base.py b/vdirsyncer/storage/base.py
index 929c59e..efa1ab2 100644
--- a/vdirsyncer/storage/base.py
+++ b/vdirsyncer/storage/base.py
@@ -150,7 +150,7 @@ class Storage(metaclass=StorageMeta):
         """
 
     @abstractmethod
-    async def get(self, href: str):
+    async def get(self, href: str) -> tuple[Item, str]:
         """Fetch a single item.
 
         :param href: href to fetch
diff --git a/vdirsyncer/storage/dav.py b/vdirsyncer/storage/dav.py
index 9402617..6728315 100644
--- a/vdirsyncer/storage/dav.py
+++ b/vdirsyncer/storage/dav.py
@@ -497,8 +497,12 @@ class DAVStorage(Storage):
     def _is_item_mimetype(self, mimetype):
         return _fuzzy_matches_mimetype(self.item_mimetype, mimetype)
 
-    async def get(self, href: str):
-        ((actual_href, item, etag),) = await aiostream.stream.list(
+    async def get(self, href: str) -> tuple[Item, str]:
+        actual_href: str
+        item: Item
+        etag: str
+
+        ((actual_href, item, etag),) = await aiostream.stream.list(  # type: ignore[misc]
             self.get_multi([href])
         )
         assert href == actual_href
diff --git a/vdirsyncer/storage/filesystem.py b/vdirsyncer/storage/filesystem.py
index c650f6a..0fe1912 100644
--- a/vdirsyncer/storage/filesystem.py
+++ b/vdirsyncer/storage/filesystem.py
@@ -98,7 +98,7 @@ class FilesystemStorage(Storage):
             ):
                 yield fname, get_etag_from_file(fpath)
 
-    async def get(self, href):
+    async def get(self, href) -> tuple[Item, str]:
         fpath = self._get_filepath(href)
         try:
             with open(fpath, "rb") as f:
diff --git a/vdirsyncer/storage/http.py b/vdirsyncer/storage/http.py
index a0e3289..fe74f13 100644
--- a/vdirsyncer/storage/http.py
+++ b/vdirsyncer/storage/http.py
@@ -117,11 +117,12 @@ class HttpStorage(Storage):
         for href, (_, etag) in self._items.items():
             yield href, etag
 
-    async def get(self, href):
+    async def get(self, href) -> tuple[Item, str]:
         if self._items is None:
             async for _ in self.list():
                 pass
 
+        assert self._items is not None  # type assertion
         try:
             return self._items[href]
         except KeyError:
diff --git a/vdirsyncer/storage/memory.py b/vdirsyncer/storage/memory.py
index 9a8b869..04cde06 100644
--- a/vdirsyncer/storage/memory.py
+++ b/vdirsyncer/storage/memory.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 import random
 
 from vdirsyncer import exceptions
+from vdirsyncer.vobject import Item
 
 from .base import Storage
 from .base import normalize_meta_value
@@ -34,7 +35,7 @@ class MemoryStorage(Storage):
         for href, (etag, _item) in self.items.items():
             yield href, etag
 
-    async def get(self, href):
+    async def get(self, href) -> tuple[Item, str]:
         etag, item = self.items[href]
         return item, etag
 
diff --git a/vdirsyncer/storage/singlefile.py b/vdirsyncer/storage/singlefile.py
index f22bacd..a5b8ac2 100644
--- a/vdirsyncer/storage/singlefile.py
+++ b/vdirsyncer/storage/singlefile.py
@@ -133,11 +133,12 @@ class SingleFileStorage(Storage):
 
                 yield href, etag
 
-    async def get(self, href):
+    async def get(self, href) -> tuple[Item, str]:
         if self._items is None or not self._at_once:
             async for _ in self.list():
                 pass
 
+        assert self._items is not None  # type assertion
         try:
             return self._items[href]
         except KeyError: