diff --git a/app/controllers/admin/api_controller.rb b/app/controllers/admin/api_controller.rb
index 57d9bce4e99..9fd25eecfbb 100644
--- a/app/controllers/admin/api_controller.rb
+++ b/app/controllers/admin/api_controller.rb
@@ -6,7 +6,7 @@ class Admin::ApiController < Admin::AdminController
 
   def regenerate_key
     api_key = ApiKey.find_by(id: params[:id])
-    raise Discourse::NotFound.new if api_key.blank?
+    raise Discourse::NotFound if api_key.blank?
 
     api_key.regenerate!(current_user)
     render_serialized(api_key, ApiKeySerializer)
@@ -14,7 +14,7 @@ class Admin::ApiController < Admin::AdminController
 
   def revoke_key
     api_key = ApiKey.find_by(id: params[:id])
-    raise Discourse::NotFound.new if api_key.blank?
+    raise Discourse::NotFound if api_key.blank?
 
     api_key.destroy
     render nothing: true
diff --git a/app/controllers/admin/reports_controller.rb b/app/controllers/admin/reports_controller.rb
index fe6408ccd8a..cd9b7c85418 100644
--- a/app/controllers/admin/reports_controller.rb
+++ b/app/controllers/admin/reports_controller.rb
@@ -5,7 +5,7 @@ class Admin::ReportsController < Admin::AdminController
   def show
     report_type = params[:type]
 
-    raise Discourse::NotFound.new unless report_type =~ /^[a-z0-9\_]+$/
+    raise Discourse::NotFound unless report_type =~ /^[a-z0-9\_]+$/
 
     start_date = 1.month.ago
     start_date = Time.parse(params[:start_date]) if params[:start_date].present?
@@ -14,7 +14,7 @@ class Admin::ReportsController < Admin::AdminController
     end_date = Time.parse(params[:end_date]) if params[:end_date].present?
 
     report = Report.find(report_type, {start_date: start_date, end_date: end_date})
-    raise Discourse::NotFound.new if report.blank?
+    raise Discourse::NotFound if report.blank?
 
     render_json_dump(report: report)
   end
diff --git a/app/controllers/admin/users_controller.rb b/app/controllers/admin/users_controller.rb
index c1194709f5d..977d1e28d74 100644
--- a/app/controllers/admin/users_controller.rb
+++ b/app/controllers/admin/users_controller.rb
@@ -38,7 +38,7 @@ class Admin::UsersController < Admin::AdminController
 
   def show
     @user = User.find_by(username_lower: params[:id])
-    raise Discourse::NotFound.new unless @user
+    raise Discourse::NotFound unless @user
     render_serialized(@user, AdminDetailedUserSerializer, root: false)
   end
 
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 1c9bdbbd8ef..6775cdf5399 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -261,7 +261,7 @@ class ApplicationController < ActionController::Base
     elsif params[:external_id]
       SingleSignOnRecord.find_by(external_id: params[:external_id]).try(:user)
     end
-    raise Discourse::NotFound.new if user.blank?
+    raise Discourse::NotFound if user.blank?
 
     guardian.ensure_can_see!(user)
     user
diff --git a/app/controllers/list_controller.rb b/app/controllers/list_controller.rb
index 2cc46690847..e6e30a54c14 100644
--- a/app/controllers/list_controller.rb
+++ b/app/controllers/list_controller.rb
@@ -225,11 +225,11 @@ class ListController < ApplicationController
     parent_category_id = nil
     if parent_slug_or_id.present?
       parent_category_id = Category.query_parent_category(parent_slug_or_id)
-      raise Discourse::NotFound.new if parent_category_id.blank?
+      raise Discourse::NotFound if parent_category_id.blank?
     end
 
     @category = Category.query_category(slug_or_id, parent_category_id)
-    raise Discourse::NotFound.new if !@category
+    raise Discourse::NotFound if !@category
 
     @description_meta = @category.description
     guardian.ensure_can_see!(@category)
diff --git a/app/controllers/user_badges_controller.rb b/app/controllers/user_badges_controller.rb
index 8ab55b2e26b..397ce503fbc 100644
--- a/app/controllers/user_badges_controller.rb
+++ b/app/controllers/user_badges_controller.rb
@@ -85,7 +85,7 @@ class UserBadgesController < ApplicationController
       else
         badge = Badge.find_by(name: params[:badge_name], enabled: true)
       end
-      raise Discourse::NotFound.new if badge.blank?
+      raise Discourse::NotFound if badge.blank?
 
       badge
     end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index b83398ad1d4..dc168a565d5 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -157,7 +157,7 @@ class UsersController < ApplicationController
       redirect_to path("/users/#{current_user.username}/#{params[:path]}")
       return
     end
-    raise Discourse::NotFound.new
+    raise Discourse::NotFound
   end
 
   def invited