1 files changed, 6 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
index 4e26c5dda1..559fb2435c 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
@@ -154,6 +154,12 @@ module ActiveRecord
         DualEncoding.connection.drop_table('dual_encodings')
       end
 
+      def test_type_cast_should_not_mutate_encoding
+        name  = 'hello'.force_encoding(Encoding::ASCII_8BIT)
+        owner = Owner.create(name: name)
+        assert_equal Encoding::ASCII_8BIT, name.encoding
+      end
+
       def test_execute
         @conn.execute "INSERT INTO items (number) VALUES (10)"
         records = @conn.execute "SELECT * FROM items"