diff --git a/confirmation/models.py b/confirmation/models.py
index bf1492bd4a..87bf2522bb 100644
--- a/confirmation/models.py
+++ b/confirmation/models.py
@@ -54,7 +54,7 @@ def generate_key() -> str:
     return b32encode(secrets.token_bytes(15)).decode().lower()
 
 
-ConfirmationObjT = Union[MultiuseInvite, PreregistrationUser, EmailChangeStatus]
+ConfirmationObjT = Union[MultiuseInvite, PreregistrationUser, EmailChangeStatus, UserProfile, Realm]
 
 
 def get_object_from_key(
diff --git a/zerver/views/auth.py b/zerver/views/auth.py
index 9b341cb76b..7660497d33 100644
--- a/zerver/views/auth.py
+++ b/zerver/views/auth.py
@@ -190,11 +190,14 @@ def maybe_send_to_registration(
     if multiuse_object_key:
         from_multiuse_invite = True
         try:
-            multiuse_obj = get_object_from_key(multiuse_object_key, [Confirmation.MULTIUSE_INVITE])
+            confirmation_obj = get_object_from_key(
+                multiuse_object_key, [Confirmation.MULTIUSE_INVITE]
+            )
         except ConfirmationKeyException as exception:
             return render_confirmation_key_error(request, exception)
 
-        assert multiuse_obj is not None
+        assert isinstance(confirmation_obj, MultiuseInvite)
+        multiuse_obj = confirmation_obj
         if realm != multiuse_obj.realm:
             return render(request, "confirmation/link_does_not_exist.html", status=404)
 
diff --git a/zerver/views/realm.py b/zerver/views/realm.py
index bd30f8f7cd..acfee2e3e3 100644
--- a/zerver/views/realm.py
+++ b/zerver/views/realm.py
@@ -330,6 +330,7 @@ def realm_reactivation(request: HttpRequest, confirmation_key: str) -> HttpRespo
         realm = get_object_from_key(confirmation_key, [Confirmation.REALM_REACTIVATION])
     except ConfirmationKeyException:
         return render(request, "zerver/realm_reactivation_link_error.html")
+    assert isinstance(realm, Realm)
     do_reactivate_realm(realm)
     context = {"realm": realm}
     return render(request, "zerver/realm_reactivation.html", context)
diff --git a/zerver/views/registration.py b/zerver/views/registration.py
index ce051bd612..4eb3dec543 100644
--- a/zerver/views/registration.py
+++ b/zerver/views/registration.py
@@ -137,6 +137,7 @@ def check_prereg_key(request: HttpRequest, confirmation_key: str) -> Preregistra
     ]
 
     prereg_user = get_object_from_key(confirmation_key, confirmation_types, activate_object=False)
+    assert isinstance(prereg_user, PreregistrationUser)
 
     if prereg_user.status == confirmation_settings.STATUS_REVOKED:
         raise ConfirmationKeyException(ConfirmationKeyException.EXPIRED)
@@ -741,9 +742,11 @@ def accounts_home(
 
 def accounts_home_from_multiuse_invite(request: HttpRequest, confirmation_key: str) -> HttpResponse:
     realm = get_realm_from_request(request)
-    multiuse_object = None
+    multiuse_object: Optional[MultiuseInvite] = None
     try:
-        multiuse_object = get_object_from_key(confirmation_key, [Confirmation.MULTIUSE_INVITE])
+        confirmation_obj = get_object_from_key(confirmation_key, [Confirmation.MULTIUSE_INVITE])
+        assert isinstance(confirmation_obj, MultiuseInvite)
+        multiuse_object = confirmation_obj
         if realm != multiuse_object.realm:
             return render(request, "confirmation/link_does_not_exist.html", status=404)
         # Required for OAuth 2
diff --git a/zerver/views/unsubscribe.py b/zerver/views/unsubscribe.py
index e1b0c31a76..3ede06d94c 100644
--- a/zerver/views/unsubscribe.py
+++ b/zerver/views/unsubscribe.py
@@ -22,6 +22,7 @@ def process_unsubscribe(
     except ConfirmationKeyException:
         return render(request, "zerver/unsubscribe_link_error.html")
 
+    assert isinstance(user_profile, UserProfile)
     unsubscribe_function(user_profile)
     context = common_context(user_profile)
     context.update(subscription_type=subscription_type)