diff --git a/lib/mix/tasks/mobilizon/media/clean_orphan.ex b/lib/mix/tasks/mobilizon/media/clean_orphan.ex
index 7c0f84e56..7b3ee34e5 100644
--- a/lib/mix/tasks/mobilizon/media/clean_orphan.ex
+++ b/lib/mix/tasks/mobilizon/media/clean_orphan.ex
@@ -8,8 +8,6 @@ defmodule Mix.Tasks.Mobilizon.Media.CleanOrphan do
 
   @shortdoc "Clean orphan media"
 
-  @grace_period Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
-
   @impl Mix.Task
   def run(options) do
     {options, [], []} =
@@ -26,9 +24,12 @@ defmodule Mix.Tasks.Mobilizon.Media.CleanOrphan do
         ]
       )
 
+    default_grace_period =
+      Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
+
     dry_run = Keyword.get(options, :dry_run, false)
     grace_period = Keyword.get(options, :days)
-    grace_period = if is_nil(grace_period), do: @grace_period, else: grace_period * 24
+    grace_period = if is_nil(grace_period), do: default_grace_period, else: grace_period * 24
     verbose = Keyword.get(options, :verbose, false)
 
     start_mobilizon()
diff --git a/lib/mix/tasks/mobilizon/users/clean.ex b/lib/mix/tasks/mobilizon/users/clean.ex
index 883d6de90..ff8fe7647 100644
--- a/lib/mix/tasks/mobilizon/users/clean.ex
+++ b/lib/mix/tasks/mobilizon/users/clean.ex
@@ -8,7 +8,6 @@ defmodule Mix.Tasks.Mobilizon.Users.Clean do
   alias Mobilizon.Service.CleanUnconfirmedUsers
 
   @shortdoc "Clean unconfirmed users from Mobilizon"
-  @grace_period Mobilizon.Config.get([:instance, :unconfirmed_user_grace_period_hours], 48)
 
   @impl Mix.Task
   def run(options) do
@@ -26,9 +25,12 @@ defmodule Mix.Tasks.Mobilizon.Users.Clean do
         ]
       )
 
+    default_grace_period =
+      Mobilizon.Config.get([:instance, :unconfirmed_user_grace_period_hours], 48)
+
     dry_run = Keyword.get(options, :dry_run, false)
     grace_period = Keyword.get(options, :days)
-    grace_period = if is_nil(grace_period), do: @grace_period, else: grace_period * 24
+    grace_period = if is_nil(grace_period), do: default_grace_period, else: grace_period * 24
     verbose = Keyword.get(options, :verbose, false)
 
     start_mobilizon()
diff --git a/lib/mobilizon/actors/actors.ex b/lib/mobilizon/actors/actors.ex
index ed5af1a6f..ad4e454ee 100644
--- a/lib/mobilizon/actors/actors.ex
+++ b/lib/mobilizon/actors/actors.ex
@@ -1740,17 +1740,14 @@ defmodule Mobilizon.Actors do
     from(a in query, where: a.preferred_username == ^name and is_nil(a.domain))
   end
 
-  @own_domain Mobilizon.Config.instance_hostname()
-
-  defp filter_by_name(query, [name, @own_domain]) do
-    filter_by_name(query, [name])
-  end
-
   defp filter_by_name(query, [name, domain]) do
-    from(a in query, where: a.preferred_username == ^name and a.domain == ^domain)
+    if domain == Mobilizon.Config.instance_hostname() do
+      filter_by_name(query, [name])
+    else
+      where(query, [a], a.preferred_username == ^name and a.domain == ^domain)
+    end
   end
 
-  @spec filter_by_name(Ecto.Query.t(), boolean | nil) :: Ecto.Query.t()
   defp filter_followed_by_approved_status(query, nil), do: query
 
   defp filter_followed_by_approved_status(query, approved) do
diff --git a/lib/service/clean_orphan_media.ex b/lib/service/clean_orphan_media.ex
index 144d74965..6aa01e3ed 100644
--- a/lib/service/clean_orphan_media.ex
+++ b/lib/service/clean_orphan_media.ex
@@ -9,8 +9,6 @@ defmodule Mobilizon.Service.CleanOrphanMedia do
   alias Mobilizon.Storage.Repo
   import Ecto.Query
 
-  @grace_period Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
-
   @doc """
   Clean orphan media
 
@@ -37,7 +35,10 @@ defmodule Mobilizon.Service.CleanOrphanMedia do
 
   @spec find_media(Keyword.t()) :: list(Media.t())
   defp find_media(opts) do
-    grace_period = Keyword.get(opts, :grace_period, @grace_period)
+    default_grace_period =
+      Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
+
+    grace_period = Keyword.get(opts, :grace_period, default_grace_period)
     expiration_date = DateTime.add(DateTime.utc_now(), grace_period * -3600)
 
     Media
diff --git a/lib/service/clean_unconfirmed_users.ex b/lib/service/clean_unconfirmed_users.ex
index 145fe11cd..d9e6e9ea5 100644
--- a/lib/service/clean_unconfirmed_users.ex
+++ b/lib/service/clean_unconfirmed_users.ex
@@ -9,8 +9,6 @@ defmodule Mobilizon.Service.CleanUnconfirmedUsers do
   alias Mobilizon.Users.User
   import Ecto.Query
 
-  @grace_period Mobilizon.Config.get([:instance, :unconfirmed_user_grace_period_hours], 48)
-
   @doc """
   Clean unattached media
 
@@ -49,7 +47,10 @@ defmodule Mobilizon.Service.CleanUnconfirmedUsers do
 
   @spec find_unconfirmed_users_to_clean(Keyword.t()) :: list(User.t())
   defp find_unconfirmed_users_to_clean(opts) do
-    grace_period = Keyword.get(opts, :grace_period, @grace_period)
+    default_grace_period =
+      Mobilizon.Config.get([:instance, :unconfirmed_user_grace_period_hours], 48)
+
+    grace_period = Keyword.get(opts, :grace_period, default_grace_period)
     expiration_date = DateTime.add(DateTime.utc_now(), grace_period * -3600)
 
     User
diff --git a/lib/service/export/icalendar.ex b/lib/service/export/icalendar.ex
index 750a2ac27..4984239fd 100644
--- a/lib/service/export/icalendar.ex
+++ b/lib/service/export/icalendar.ex
@@ -10,8 +10,6 @@ defmodule Mobilizon.Service.Export.ICalendar do
   alias Mobilizon.Service.Export.Common
   alias Mobilizon.Service.Formatter.HTML
 
-  @vendor "Mobilizon #{Config.instance_version()}"
-
   @doc """
   Create cache for an actor, an event or an user token
   """
@@ -119,7 +117,7 @@ defmodule Mobilizon.Service.Export.ICalendar do
   @spec events_to_ics(list(Events.t())) :: String.t()
   defp events_to_ics(events) do
     %ICalendar{events: events |> Enum.map(&do_export_event/1)}
-    |> ICalendar.to_ics(vendor: @vendor)
+    |> ICalendar.to_ics(vendor: vendor())
   end
 
   @spec do_export_event(Event.t()) :: ICalendar.Event.t()
@@ -137,4 +135,8 @@ defmodule Mobilizon.Service.Export.ICalendar do
       categories: event.tags |> Enum.map(& &1.title)
     }
   end
+
+  defp vendor do
+    "Mobilizon #{Config.instance_version()}"
+  end
 end
diff --git a/lib/service/workers/clean_orphan_media_worker.ex b/lib/service/workers/clean_orphan_media_worker.ex
index 04b6fa1aa..566120b24 100644
--- a/lib/service/workers/clean_orphan_media_worker.ex
+++ b/lib/service/workers/clean_orphan_media_worker.ex
@@ -6,8 +6,6 @@ defmodule Mobilizon.Service.Workers.CleanOrphanMediaWorker do
   use Oban.Worker, queue: "background"
   alias Mobilizon.Service.CleanOrphanMedia
 
-  @grace_period Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
-
   @impl Oban.Worker
   def perform(%Job{}) do
     if Mobilizon.Config.get!([:instance, :remove_orphan_uploads]) and should_perform?() do
@@ -19,9 +17,12 @@ defmodule Mobilizon.Service.Workers.CleanOrphanMediaWorker do
   defp should_perform? do
     case Cachex.get(:key_value, "last_media_cleanup") do
       {:ok, %DateTime{} = last_media_cleanup} ->
+        default_grace_period =
+          Mobilizon.Config.get([:instance, :orphan_upload_grace_period_hours], 48)
+
         DateTime.compare(
           last_media_cleanup,
-          DateTime.add(DateTime.utc_now(), @grace_period * -3600)
+          DateTime.add(DateTime.utc_now(), default_grace_period * -3600)
         ) == :lt
 
       _ ->
diff --git a/lib/service/workers/clean_unconfirmed_users_worker.ex b/lib/service/workers/clean_unconfirmed_users_worker.ex
index 472f3a03a..ef324caf6 100644
--- a/lib/service/workers/clean_unconfirmed_users_worker.ex
+++ b/lib/service/workers/clean_unconfirmed_users_worker.ex
@@ -6,8 +6,6 @@ defmodule Mobilizon.Service.Workers.CleanUnconfirmedUsersWorker do
   use Oban.Worker, queue: "background"
   alias Mobilizon.Service.CleanUnconfirmedUsers
 
-  @grace_period Mobilizon.Config.get([:instance, :unconfirmed_user_grace_period_hours], 48)
-
   @impl Oban.Worker
   def perform(%Job{}) do
     if Mobilizon.Config.get!([:instance, :remove_unconfirmed_users]) and should_perform?() do
@@ -19,9 +17,12 @@ defmodule Mobilizon.Service.Workers.CleanUnconfirmedUsersWorker do
   defp should_perform? do
     case Cachex.get(:key_value, "last_media_cleanup") do
       {:ok, %DateTime{} = last_media_cleanup} ->
+        default_grace_period =
+          Mobilizon.Config.get([:instance, :unconfirmed_user_grace_period_hours], 48)
+
         DateTime.compare(
           last_media_cleanup,
-          DateTime.add(DateTime.utc_now(), @grace_period * -3600)
+          DateTime.add(DateTime.utc_now(), default_grace_period * -3600)
         ) == :lt
 
       _ ->