diff -Nur a/test/helper.rb b/test/helper.rb
--- a/test/helper.rb	2016-04-29 08:08:27.000000000 +0800
+++ b/test/helper.rb	2022-03-01 16:01:56.363475931 +0800
@@ -106,7 +106,6 @@
     t.string :name
     t.integer :age
     t.binary :avatar
-    t.datetime :created_at
     t.boolean :awesome
     t.string :preferences
     t.integer :alternative_id
@@ -119,7 +118,6 @@
     t.string :name
     t.integer :age
     t.binary :avatar
-    t.datetime :created_at
     t.boolean :awesome
     t.string :preferences
     t.integer :alternative_id