Can I return to Thailand for another 30 days after visiting Vietnam with a visa on arrival?

The user initially held a one-month visa on arrival, which was extended by 30 days. They are inquiring about returning to Thailand from Vietnam, questioning if they can simply apply for the 'Test and Go' program or if they need to obtain another visa. According to community responses, they can return without a new visa as long as they obtain a ThailandPass.