Change the behavior of db:test:prepare task when schema_format is sql for consistency.

activerecord/lib/active_record/railties/databases.rake

@@ -399,7 +399,7 @@ db_namespace = namespace :db do
     # desc 'Check for pending migrations and load the test schema'
     task :prepare => 'db:abort_if_pending_migrations' do
       unless ActiveRecord::Base.configurations.blank?
-        db_namespace[{ :sql  => 'test:clone_structure', :ruby => 'test:load' }[ActiveRecord::Base.schema_format]].invoke
+        db_namespace['test:load'].invoke
       end
     end
   end

railties/test/application/rake_test.rb

@@ -153,6 +153,15 @@ module ApplicationTests
       assert_match(/Execute db:test:clone_structure/, output)
     end
 
+    def test_db_test_prepare_when_using_sql_format
+      add_to_config "config.active_record.schema_format = :sql"
+      output = Dir.chdir(app_path) do
+        `rails generate scaffold user username:string;
+         bundle exec rake db:migrate db:test:clone 2>&1 --trace`
+      end
+      assert_match(/Execute db:test:load_structure/, output)
+    end
+
     def test_rake_dump_structure_should_respect_db_structure_env_variable
       Dir.chdir(app_path) do
         # ensure we have a schema_migrations table to dump