The Driver and Vehicle Standards Agency is clamping down on people who use Bluetooth to cheat during their driving theory test.
According to the DVSA, candidates have been caught using the earpieces to help them with the answers to the exam.
The Times reports the DVSA has investigated 467 cases of fraud using wireless technology in the past 12 months, a rise of 52 per cent from 308 in 2015.
Since 2016, 50 people have been handed prison sentences for fraud during their theory test.
This includes Zaid Sultan, 46, of Calvert Road, Sheffield who was jailed earlier this year for four months after being caught using a Bluetooth earpiece he had connected wirelessly to a phone stuffed down his sock.
Gareth Llewellyn, DVSA's chief executive, said: "We need evidence and we are changing the CCTV in the test centres to enable us to do that. I have to say that people who invigilate those tests are very good at picking out people with Bluetooth earphones.
"It is just the odd behaviour like scratching your ankle constantly because your mobile phone is in there."
Although a small percentage in comparison to the 1.8 million people every year who sit their theory test, fraudulent activity is still taken very seriously by the DVSA. It has been tackling different sorts of cheating during tests for more than five years, from banning interpreters because of answers being given in foreign languages, to not giving away questions in advance to candidates.
By Aidan Rennie-Jones