diff --git a/app/logical/daily_maintenance.rb b/app/logical/daily_maintenance.rb
index e5d66318c..7e8b02d32 100644
--- a/app/logical/daily_maintenance.rb
+++ b/app/logical/daily_maintenance.rb
@@ -3,8 +3,8 @@ class DailyMaintenance
     ActiveRecord::Base.connection.execute("set statement_timeout = 0")
     PostPruner.new.prune!
     TagPruner.new.prune!
-    Upload.delete_all(['created_at < ?', 1.day.ago])
-    Delayed::Job.delete_all(['created_at < ?', 45.days.ago])
+    Upload.where('created_at < ?', 1.day.ago).delete_all
+    Delayed::Job.where('created_at < ?', 45.days.ago).delete_all
     PostVote.prune!
     CommentVote.prune!
     ApiCacheGenerator.new.generate_tag_cache
diff --git a/app/models/user_password_reset_nonce.rb b/app/models/user_password_reset_nonce.rb
index fbdc0e151..012720a2d 100644
--- a/app/models/user_password_reset_nonce.rb
+++ b/app/models/user_password_reset_nonce.rb
@@ -5,7 +5,7 @@ class UserPasswordResetNonce < ApplicationRecord
   after_create :deliver_notice
 
   def self.prune!
-    destroy_all(["created_at < ?", 1.week.ago])
+    where("created_at < ?", 1.week.ago).destroy_all
   end
 
   def deliver_notice
diff --git a/test/unit/daily_maintenance_test.rb b/test/unit/daily_maintenance_test.rb
new file mode 100644
index 000000000..13198deff
--- /dev/null
+++ b/test/unit/daily_maintenance_test.rb
@@ -0,0 +1,33 @@
+require 'test_helper'
+
+class DailyMaintenanceTest < ActiveSupport::TestCase
+  context "daily maintenance" do
+    setup do
+      # have ApiCacheGenerator save files to a temp dir.
+      @temp_shared_dir_path = "/tmp/#{SecureRandom.uuid}"
+      Danbooru.config.stubs(:shared_dir_path).returns(@temp_shared_dir_path)
+
+      FactoryBot.create(:tag, post_count: 1) # for ApiCacheGenerator
+      FactoryBot.create(:admin_user) # for SuperVoter.init!
+    end
+
+    teardown do
+      FileUtils.rm_rf(@temp_shared_dir_path)
+      Danbooru.config.unstub(:shared_dir_path)
+    end
+
+    should "work" do
+      assert_nothing_raised { DailyMaintenance.new.run }
+    end
+
+    should "prune expired posts" do
+      @pending = FactoryBot.create(:post, is_pending: true, created_at: 4.days.ago)
+      @flagged = FactoryBot.create(:post, is_flagged: true, created_at: 4.days.ago)
+
+      DailyMaintenance.new.run
+
+      assert(true, @pending.reload.is_deleted)
+      assert(true, @flagged.reload.is_deleted)
+    end
+  end
+end
diff --git a/test/unit/weekly_maintenance_test.rb b/test/unit/weekly_maintenance_test.rb
new file mode 100644
index 000000000..278c7184e
--- /dev/null
+++ b/test/unit/weekly_maintenance_test.rb
@@ -0,0 +1,13 @@
+require 'test_helper'
+
+class WeeklyMaintenanceTest < ActiveSupport::TestCase
+  context "weekly maintenance" do
+    should "prune password resets" do
+      @user = FactoryBot.create(:user, email: "test@example.com")
+      @nonce = FactoryBot.create(:user_password_reset_nonce, email: "test@example.com", created_at: 1.month.ago)
+
+      WeeklyMaintenance.new.run
+      assert_equal(0, UserPasswordResetNonce.count)
+    end
+  end
+end