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diff --git a/vendor/rails/activerecord/test/cases/callbacks_observers_test.rb b/vendor/rails/activerecord/test/cases/callbacks_observers_test.rb
new file mode 100644
index 0000000..87de524
--- /dev/null
+++ b/vendor/rails/activerecord/test/cases/callbacks_observers_test.rb
@@ -0,0 +1,38 @@
+require "cases/helper"
+
+class Comment < ActiveRecord::Base
+  attr_accessor :callers
+
+  before_validation :record_callers
+
+  def after_validation
+    record_callers
+  end
+
+  def record_callers
+    callers << self.class if callers
+  end
+end
+
+class CommentObserver < ActiveRecord::Observer
+  attr_accessor :callers
+
+  def after_validation(model)
+    callers << self.class if callers
+  end
+end
+
+class CallbacksObserversTest < ActiveRecord::TestCase
+  def test_model_callbacks_fire_before_observers_are_notified
+    callers = []
+
+    comment = Comment.new
+    comment.callers = callers
+
+    CommentObserver.instance.callers = callers
+
+    comment.valid?
+
+    assert_equal [Comment, Comment, CommentObserver], callers, "model callbacks did not fire before observers were notified"
+  end
+end