diff --git a/activerecord/test/cases/migration_test.rb b/activerecord/test/cases/migration_test.rb
index 84720585f2934a3f78e53fee9468d4dd89112f4d..2a00b2a3a69081a223d0b4b4e73e4c63df231838 100644
--- a/activerecord/test/cases/migration_test.rb
+++ b/activerecord/test/cases/migration_test.rb
@@ -63,7 +63,7 @@ def setup
     end
     Person.connection.remove_column("people", "first_name") rescue nil
     Person.connection.remove_column("people", "middle_name") rescue nil
-    Person.connection.add_column("people", "first_name", :string, :limit => 40)
+    Person.connection.add_column("people", "first_name", :string, null: false)
     Person.reset_column_information
   end