1 files changed, 15 insertions, 0 deletions
diff --git a/activerecord/test/cases/dirty_test.rb b/activerecord/test/cases/dirty_test.rb
index c7d2ba6073..7b2034dadf 100644
--- a/activerecord/test/cases/dirty_test.rb
+++ b/activerecord/test/cases/dirty_test.rb
@@ -243,6 +243,21 @@ class DirtyTest < ActiveRecord::TestCase
     assert !pirate.changed?
   end
 
+  def test_float_zero_to_string_zero_not_marked_as_changed
+    data = NumericData.new :temperature => 0.0
+    data.save!
+
+    assert_not data.changed?
+
+    data.temperature = '0'
+    assert_empty data.changes
+
+    data.temperature = '0.0'
+    assert_empty data.changes
+
+    data.temperature = '0.00'
+    assert_empty data.changes
+  end
 
   def test_zero_to_blank_marked_as_changed
     pirate = Pirate.new