diff --git a/app/controllers/admin/stats_controller.rb b/app/controllers/admin/stats_controller.rb
index 758c46f9..b5685bff 100644
--- a/app/controllers/admin/stats_controller.rb
+++ b/app/controllers/admin/stats_controller.rb
@@ -187,7 +187,7 @@ module Admin
         total = @conference.events.where(state: mystate).count
         status = "#{myvar.name}"
 
-        percent = 0
+        percent = 0 # rubocop:disable Lint/UselessAssignment
         if value != 0
           percent = (value.to_f / total * 100).round(2)
           result << { 'status' => status, 'value' => value, 'percent' => percent }
diff --git a/app/controllers/admin/supporters_controller.rb b/app/controllers/admin/supporters_controller.rb
index 6975d5f5..216c2bda 100644
--- a/app/controllers/admin/supporters_controller.rb
+++ b/app/controllers/admin/supporters_controller.rb
@@ -10,7 +10,7 @@ class Admin::SupportersController < ApplicationController
 
   def create
     params[:supporter_registration][:conference_id] = @conference.id
-    supporter = SupporterRegistration.create!(params[:supporter_registration])
+    SupporterRegistration.create!(params[:supporter_registration])
     redirect_to(admin_conference_supporters_path(:conference_id => @conference.short_title), :notice => "Supporter added")
   end
 end
diff --git a/app/controllers/event_attachments_controller.rb b/app/controllers/event_attachments_controller.rb
index 61a76b0b..af6ce3fc 100644
--- a/app/controllers/event_attachments_controller.rb
+++ b/app/controllers/event_attachments_controller.rb
@@ -52,8 +52,8 @@ class EventAttachmentsController < ApplicationController
 
     if !organizer_or_admin?
       begin
-        event = current_user.events.find(params[:proposal_id])
-      rescue => e
+        current_user.events.find(params[:proposal_id])
+      rescue
         # They certainly aren't allowed to attach a file to someone else's proposal
         raise ActionController::RoutingError.new('Invalid proposal')
       end
diff --git a/db/seeds.rb b/db/seeds.rb
index 8c47da2c..c01e0fcc 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -10,8 +10,8 @@ Role.create(:name => "Organizer")
 Role.create(:name => "Admin")
 
 qtype_yesno = QuestionType.create(:title => "Yes/No")
-qtype_single = QuestionType.create(:title => "Single Choice")
-qtype_multiple = QuestionType.create(:title => "Multiple Choice")
+QuestionType.create(:title => "Single Choice")
+QuestionType.create(:title => "Multiple Choice")
 
 answer_yes = Answer.create(:title => "Yes")
 answer_no = Answer.create(:title => "No")