diff --git a/app/workers/reminder.rb b/app/workers/reminder.rb
new file mode 100644
index 0000000..29584e2
--- /dev/null
+++ b/app/workers/reminder.rb
@@ -0,0 +1,37 @@
+class Reminder
+  def initialize
+    @collection = reminder_collection
+  end
+
+  def count
+    @collection.count
+  end
+  alias size count
+
+  def candidates
+    Candidate.includes(:recruiter).where(id: @collection.map { |row| row['id'] })
+  end
+
+  def send_all
+    candidates.each do |candidate|
+      CandidateMailer.reminder(candidate).deliver_now
+      flag_as_reminded candidate.id
+    end
+  end
+
+  private
+
+    def reminder_collection
+      sql = "select c.id, c.test_hash, c.name, c.email, max(a.updated_at) last_updated
+             from candidates c
+               inner join answers a on a.candidate_id = c.id
+             where completed = false and reminded = false
+             group by c.id
+             having MAX(a.updated_at) < DATE_SUB(NOW(), INTERVAL 24 HOUR);"
+      ActiveRecord::Base.connection.exec_query(sql)
+    end
+
+    def flag_as_reminded candidate_id
+      Candidate.find(candidate_id).update(reminded: true)
+    end
+end
diff --git a/lib/tasks/reminders.rake b/lib/tasks/reminders.rake
new file mode 100644
index 0000000..bd2ee48
--- /dev/null
+++ b/lib/tasks/reminders.rake
@@ -0,0 +1,7 @@
+namespace :reminders do
+  desc "send reminders to stagnate quizes"
+  task send_all: :environment do
+    reminders = Reminder.new
+    reminders.send_all
+  end
+end
diff --git a/test/fixtures/answers.yml b/test/fixtures/answers.yml
index a46385b..7ae3270 100644
--- a/test/fixtures/answers.yml
+++ b/test/fixtures/answers.yml
@@ -6,8 +6,8 @@ roy1:
   answer: option2
   saved: 0
   submitted: true
-  created_at: <%= DateTime.now() - 90.minutes %>
-  updated_at: <%= DateTime.now() - 90.minutes %>
+  created_at: <%= DateTime.now() - 90.minutes - 36.hours %>
+  updated_at: <%= DateTime.now() - 90.minutes - 36.hours %>
 
 roy2:
   candidate: roy
@@ -15,8 +15,8 @@ roy2:
   answer: ["option-1", "option-4", "option5"]
   saved: 1
   submitted: true
-  created_at: <%= DateTime.now() - 85.minutes %>
-  updated_at: <%= DateTime.now() - 85.minutes %>
+  created_at: <%= DateTime.now() - 85.minutes - 36.hours %>
+  updated_at: <%= DateTime.now() - 85.minutes - 36.hours %>
 
 dawn1:
   candidate: dawn
diff --git a/test/workers/reminder_test.rb b/test/workers/reminder_test.rb
new file mode 100644
index 0000000..00d25e5
--- /dev/null
+++ b/test/workers/reminder_test.rb
@@ -0,0 +1,26 @@
+require 'test_helper'
+
+class ReminderTest < ActiveSupport::TestCase
+  test "collection is created with one result" do
+    reminders = Reminder.new
+    assert_equal 1, reminders.size
+  end
+
+  test "each candidate has needed attributes" do
+    reminders = Reminder.new
+
+    assert_instance_of String, reminders.candidates.first.name
+    assert_instance_of String, reminders.candidates.first.test_hash
+    assert_instance_of String, reminders.candidates.first.email
+  end
+
+  test "send reminders sends email, and flags reminded" do
+    reminders = Reminder.new
+    pre_reminded = Candidate.find(reminders.candidates.first.id).reminded
+
+    assert_difference("ActionMailer::Base.deliveries.size", reminders.count) do
+      reminders.send_all
+    end
+    refute_equal pre_reminded, Candidate.find(reminders.candidates.first.id).reminded
+  end
+end