diff --git a/activestorage/app/jobs/active_storage/purge_job.rb b/activestorage/app/jobs/active_storage/purge_job.rb
index fa15e0451d..b021b5f2d0 100644
--- a/activestorage/app/jobs/active_storage/purge_job.rb
+++ b/activestorage/app/jobs/active_storage/purge_job.rb
@@ -2,7 +2,7 @@
 
 # Provides asynchronous purging of ActiveStorage::Blob records via ActiveStorage::Blob#purge_later.
 class ActiveStorage::PurgeJob < ActiveStorage::BaseJob
-  discard_on ActiveRecord::RecordNotFound
+  discard_on ActiveRecord::RecordNotFound, ActiveRecord::InvalidForeignKey
 
   def perform(blob)
     blob.purge
diff --git a/activestorage/test/jobs/purge_job_test.rb b/activestorage/test/jobs/purge_job_test.rb
index 251022a96f..ed4100b78d 100644
--- a/activestorage/test/jobs/purge_job_test.rb
+++ b/activestorage/test/jobs/purge_job_test.rb
@@ -24,4 +24,14 @@ class ActiveStorage::PurgeJobTest < ActiveJob::TestCase
       end
     end
   end
+
+  test "ignores attached blob" do
+    User.create! name: "DHH", avatar: @blob
+
+    perform_enqueued_jobs do
+      assert_nothing_raised do
+        ActiveStorage::PurgeJob.perform_later @blob
+      end
+    end
+  end
 end