Voters in 10 areas of England will have to bring identity documents with them to the polling station in next month’s council elections.
The pilot for the vote on 2 May follows a trial in five areas in 2018, which saw hundreds of people refused a ballot paper.
The government is testing the scheme to combat potential voter fraud.
Critics said the scheme would deny people their democratic right and was unnecessary because fraud is low.
What is the voter ID trial?
The government said it was part of an ongoing process to reduce the risk of voter fraud and ensure vote security.
Some councils will ask for photo ID, such as a driving licence. Some will ask for a mix of photo and non-photo ID, while some will accept