diff --git a/lib/pleroma/user_invite_token.ex b/lib/pleroma/user_invite_token.ex
index fadc89891..b9e80acdd 100644
--- a/lib/pleroma/user_invite_token.ex
+++ b/lib/pleroma/user_invite_token.ex
@@ -74,7 +74,7 @@ def find_by_token!(token), do: Repo.get_by!(UserInviteToken, token: token)
 
   @spec find_by_token(token()) :: {:ok, UserInviteToken.t()} | nil
   def find_by_token(token) do
-    with invite <- Repo.get_by(UserInviteToken, token: token) do
+    with %UserInviteToken{} = invite <- Repo.get_by(UserInviteToken, token: token) do
       {:ok, invite}
     end
   end
diff --git a/lib/pleroma/web/admin_api/admin_api_controller.ex b/lib/pleroma/web/admin_api/admin_api_controller.ex
index 4a0bf4823..811be1eff 100644
--- a/lib/pleroma/web/admin_api/admin_api_controller.ex
+++ b/lib/pleroma/web/admin_api/admin_api_controller.ex
@@ -272,11 +272,13 @@ def invites(conn, _params) do
 
   @doc "Revokes invite by token"
   def revoke_invite(conn, %{"token" => token}) do
-    invite = UserInviteToken.find_by_token!(token)
-    {:ok, updated_invite} = UserInviteToken.update_invite(invite, %{used: true})
-
-    conn
-    |> json(AccountView.render("invite.json", %{invite: updated_invite}))
+    with {:ok, invite} <- UserInviteToken.find_by_token(token),
+         {:ok, updated_invite} = UserInviteToken.update_invite(invite, %{used: true}) do
+      conn
+      |> json(AccountView.render("invite.json", %{invite: updated_invite}))
+    else
+      nil -> {:error, :not_found}
+    end
   end
 
   @doc "Get a password reset token (base64 string) for given nickname"
diff --git a/test/tasks/user_test.exs b/test/tasks/user_test.exs
index 3d4b08fba..2b9453042 100644
--- a/test/tasks/user_test.exs
+++ b/test/tasks/user_test.exs
@@ -5,6 +5,9 @@
 defmodule Mix.Tasks.Pleroma.UserTest do
   alias Pleroma.Repo
   alias Pleroma.User
+  alias Pleroma.Web.OAuth.Authorization
+  alias Pleroma.Web.OAuth.Token
+
   use Pleroma.DataCase
 
   import Pleroma.Factory
@@ -327,6 +330,13 @@ test "invite is revoked" do
       assert_received {:mix_shell, :info, [message]}
       assert message =~ "Invite for token #{invite.token} was revoked."
     end
+
+    test "it prints an error message when invite is not exist" do
+      Mix.Tasks.Pleroma.User.run(["revoke_invite", "foo"])
+
+      assert_received {:mix_shell, :error, [message]}
+      assert message =~ "No invite found"
+    end
   end
 
   describe "running delete_activities" do
@@ -337,6 +347,13 @@ test "activities are deleted" do
       assert_received {:mix_shell, :info, [message]}
       assert message == "User #{nickname} statuses deleted."
     end
+
+    test "it prints an error message when user is not exist" do
+      Mix.Tasks.Pleroma.User.run(["delete_activities", "foo"])
+
+      assert_received {:mix_shell, :error, [message]}
+      assert message =~ "No local user"
+    end
   end
 
   describe "running toggle_confirmed" do
@@ -364,6 +381,13 @@ test "user is not confirmed" do
       refute user.info.confirmation_pending
       refute user.info.confirmation_token
     end
+
+    test "it prints an error message when user is not exist" do
+      Mix.Tasks.Pleroma.User.run(["toggle_confirmed", "foo"])
+
+      assert_received {:mix_shell, :error, [message]}
+      assert message =~ "No local user"
+    end
   end
 
   describe "search" do
@@ -386,4 +410,64 @@ test "it returns users matching" do
                User.Search.search("moon fediverse", for_user: user) |> Enum.map(& &1.id)
     end
   end
+
+  describe "signing out" do
+    test "it deletes all user's tokens and authorizations" do
+      user = insert(:user)
+      insert(:oauth_token, user: user)
+      insert(:oauth_authorization, user: user)
+
+      assert Repo.get_by(Token, user_id: user.id)
+      assert Repo.get_by(Authorization, user_id: user.id)
+
+      :ok = Mix.Tasks.Pleroma.User.run(["sign_out", user.nickname])
+
+      refute Repo.get_by(Token, user_id: user.id)
+      refute Repo.get_by(Authorization, user_id: user.id)
+    end
+
+    test "it prints an error message when user is not exist" do
+      Mix.Tasks.Pleroma.User.run(["sign_out", "foo"])
+
+      assert_received {:mix_shell, :error, [message]}
+      assert message =~ "No local user"
+    end
+  end
+
+  describe "tagging" do
+    test "it add tags to a user" do
+      user = insert(:user)
+
+      :ok = Mix.Tasks.Pleroma.User.run(["tag", user.nickname, "pleroma"])
+
+      user = User.get_cached_by_nickname(user.nickname)
+      assert "pleroma" in user.tags
+    end
+
+    test "it prints an error message when user is not exist" do
+      Mix.Tasks.Pleroma.User.run(["tag", "foo"])
+
+      assert_received {:mix_shell, :error, [message]}
+      assert message =~ "Could not change user tags"
+    end
+  end
+
+  describe "untagging" do
+    test "it deletes tags from a user" do
+      user = insert(:user, tags: ["pleroma"])
+      assert "pleroma" in user.tags
+
+      :ok = Mix.Tasks.Pleroma.User.run(["untag", user.nickname, "pleroma"])
+
+      user = User.get_cached_by_nickname(user.nickname)
+      assert Enum.empty?(user.tags)
+    end
+
+    test "it prints an error message when user is not exist" do
+      Mix.Tasks.Pleroma.User.run(["untag", "foo"])
+
+      assert_received {:mix_shell, :error, [message]}
+      assert message =~ "Could not change user tags"
+    end
+  end
 end
diff --git a/test/web/admin_api/admin_api_controller_test.exs b/test/web/admin_api/admin_api_controller_test.exs
index ee48b752c..03aa46cae 100644
--- a/test/web/admin_api/admin_api_controller_test.exs
+++ b/test/web/admin_api/admin_api_controller_test.exs
@@ -1010,6 +1010,17 @@ test "with token" do
                "uses" => 0
              }
     end
+
+    test "with invalid token" do
+      admin = insert(:user, info: %{is_admin: true})
+
+      conn =
+        build_conn()
+        |> assign(:user, admin)
+        |> post("/api/pleroma/admin/users/revoke_invite", %{"token" => "foo"})
+
+      assert json_response(conn, :not_found) == "Not found"
+    end
   end
 
   describe "GET /api/pleroma/admin/reports/:id" do
diff --git a/test/web/oauth/oauth_controller_test.exs b/test/web/oauth/oauth_controller_test.exs
index aae34804d..92e156347 100644
--- a/test/web/oauth/oauth_controller_test.exs
+++ b/test/web/oauth/oauth_controller_test.exs
@@ -5,9 +5,7 @@
 defmodule Pleroma.Web.OAuth.OAuthControllerTest do
   use Pleroma.Web.ConnCase
   import Pleroma.Factory
-  import Mock
 
-  alias Pleroma.Registration
   alias Pleroma.Repo
   alias Pleroma.Web.OAuth.Authorization
   alias Pleroma.Web.OAuth.OAuthController
@@ -108,28 +106,26 @@ test "with user-bound registration, GET /oauth/<provider>/callback redirects to
         "state" => ""
       }
 
-      with_mock Pleroma.Web.Auth.Authenticator,
-        get_registration: fn _ -> {:ok, registration} end do
-        conn =
-          get(
-            conn,
-            "/oauth/twitter/callback",
-            %{
-              "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
-              "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
-              "provider" => "twitter",
-              "state" => Poison.encode!(state_params)
-            }
-          )
+      conn =
+        conn
+        |> assign(:ueberauth_auth, %{provider: registration.provider, uid: registration.uid})
+        |> get(
+          "/oauth/twitter/callback",
+          %{
+            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
+            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
+            "provider" => "twitter",
+            "state" => Poison.encode!(state_params)
+          }
+        )
 
-        assert response = html_response(conn, 302)
-        assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
-      end
+      assert response = html_response(conn, 302)
+      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
     end
 
     test "with user-unbound registration, GET /oauth/<provider>/callback renders registration_details page",
          %{app: app, conn: conn} do
-      registration = insert(:registration, user: nil)
+      user = insert(:user)
 
       state_params = %{
         "scope" => "read write",
@@ -138,26 +134,28 @@ test "with user-unbound registration, GET /oauth/<provider>/callback renders reg
         "state" => "a_state"
       }
 
-      with_mock Pleroma.Web.Auth.Authenticator,
-        get_registration: fn _ -> {:ok, registration} end do
-        conn =
-          get(
-            conn,
-            "/oauth/twitter/callback",
-            %{
-              "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
-              "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
-              "provider" => "twitter",
-              "state" => Poison.encode!(state_params)
-            }
-          )
+      conn =
+        conn
+        |> assign(:ueberauth_auth, %{
+          provider: "twitter",
+          uid: "171799000",
+          info: %{nickname: user.nickname, email: user.email, name: user.name, description: nil}
+        })
+        |> get(
+          "/oauth/twitter/callback",
+          %{
+            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
+            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
+            "provider" => "twitter",
+            "state" => Poison.encode!(state_params)
+          }
+        )
 
-        assert response = html_response(conn, 200)
-        assert response =~ ~r/name="op" type="submit" value="register"/
-        assert response =~ ~r/name="op" type="submit" value="connect"/
-        assert response =~ Registration.email(registration)
-        assert response =~ Registration.nickname(registration)
-      end
+      assert response = html_response(conn, 200)
+      assert response =~ ~r/name="op" type="submit" value="register"/
+      assert response =~ ~r/name="op" type="submit" value="connect"/
+      assert response =~ user.email
+      assert response =~ user.nickname
     end
 
     test "on authentication error, GET /oauth/<provider>/callback redirects to `redirect_uri`", %{