Thousands of drivers who were originally due their test between March 30 and July 31 last year benefited from a test extension.
The government automatically extended MOT certificates for six months due to coronavirus which led to garage backlogs over winter.
But the DVSA warned many drivers could still be caught out with many certificates now due to end within a few days.
And those who have not set up reminder notices could risk forgetting to get their car tested in time.
A statement said: “Your vehicle’s MOT was due to expire on July 31, 2020.
“This will automatically be extended to January 31. 2021. You will need to get your MOT by this date.”
MOT services and vehicle repair garages are allowed to remain open during the current lockdown restrictions.
There are no further extensions that have been put in place meaning road users who forget to do their tests could be caught out.
According to BookMyGarage, it found nearly 700,000 fewer MOT tests were carried out in June last year.
That means thousands of MOT tests which were due in the past six months were conducted over the Christmas period.
The experts at Halfords says the current fine for driving without an MOT is up to £1,000.
Motorists can even be charged for driving an unroadworthy car even if the certificate is still valid.
However, driving a vehicle in a dangerous condition can land yourself and others risk on the roads.
The Association of British Insurers has warned many drivers’ policies require a valid MOT test.
They said drivers will not be able to drive past their MOT cut-off date without a valid excuse.
A spokesman said: “Motorists should get their MOT in the usual way.
“If this is not possible due to the impact of Covid-19, such as the need to self-isolate, insurers will be pragmatic and not penalise you for something that is out of your control.
“Safety is paramount and it is illegal to drive a car in a dangerous condition, so make sure to check your brakes, tyres and lights before driving.”