diff --git a/app/jobs/scheduled/pending_reviewables_reminder.rb b/app/jobs/scheduled/pending_reviewables_reminder.rb
index 6d96530f19c..1a94e70b836 100644
--- a/app/jobs/scheduled/pending_reviewables_reminder.rb
+++ b/app/jobs/scheduled/pending_reviewables_reminder.rb
@@ -3,7 +3,7 @@
 module Jobs
 
   class PendingReviewablesReminder < ::Jobs::Scheduled
-    every 1.hour
+    every 15.minutes
 
     attr_reader :sent_reminder
 
@@ -14,7 +14,7 @@ module Jobs
         reviewable_ids = Reviewable
           .pending
           .default_visible
-          .where('latest_score < ?', SiteSetting.notify_about_flags_after.to_i.hours.ago)
+          .where('latest_score < ?', SiteSetting.notify_about_flags_after.to_f.hours.ago)
           .order('id DESC')
           .pluck(:id)
 
diff --git a/config/site_settings.yml b/config/site_settings.yml
index 4d131504b17..9f42c4dbaf1 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -2237,7 +2237,9 @@ uncategorized:
     default: -1
     hidden: true
 
-  notify_about_flags_after: 48
+  notify_about_flags_after:
+    type: float
+    default: 48
 
   show_create_topics_notice:
     client: true
diff --git a/spec/jobs/pending_reviewables_reminder_spec.rb b/spec/jobs/pending_reviewables_reminder_spec.rb
index e899a657df8..6658e3d6ff8 100644
--- a/spec/jobs/pending_reviewables_reminder_spec.rb
+++ b/spec/jobs/pending_reviewables_reminder_spec.rb
@@ -24,6 +24,20 @@ describe Jobs::PendingReviewablesReminder do
     end
   end
 
+  context "notify_about_flags_after accepts a float" do
+    before { SiteSetting.notify_about_flags_after = 0.25 }
+
+    it "doesn't send message when flags are less than 15 minutes old" do
+      create_flag(14.minutes.ago)
+      expect(execute.sent_reminder).to eq(false)
+    end
+
+    it "sends message when there is a flag older than 15 minutes" do
+      create_flag(16.minutes.ago)
+      expect(execute.sent_reminder).to eq(true)
+    end
+  end
+
   context "notify_about_flags_after is 48" do
     before do
       SiteSetting.notify_about_flags_after = 48