Children want to skip school to avoid the stress of SATs, according to a parent supporting a Hackney campaign to stop the tests in primary schools.
Hackney North Labour Party and Hackney National Education Union (NEU) organised a "scrap the SATs jamboree" in Clissold Park on Friday afternoon.
The NEU is holding an indicative ballot to see if there is support among primary school teachers to boycott the tests.
Mia, eight, who completed her Year 2 SATs last year, said: "SATs are not as good for children because it puts stress into you."
Her mother Anita told the Gazette her daughter does not want to take further SATs at the end of primary school due to the pressure she experienced during the preparation period.
Anita said: "She really loves school and misses it on the weekends and during school holidays but after she experienced SATs in Year 2 she said she would quit in Year 6 just to not do the SATs.
"They say they are judging the school but they are judging each child."
Bethany Merrifield, a Year 6 student at Northwold Primary School, added: "I don't think SATs are beneficial in the long term, for example, for getting a job.
"I'm not saying there should be no assessments but I don't think they should be as big of a deal and worry kids."
Jane Bassett, 59, a secondary school English teacher from Hackney NEU, said: "The NEU is running a campaign to end what is called high stakes testing in schools.
"This gives confidence to teachers that parents are on their side.
"It's about saying schools should be accountable to local communities and parents, not government league tables."
The event was also attended by Hackney's deputy mayor and education chief Cllr Anntoinette Bramble, who said she would pass on feedback to Labour leader Jeremy Corbyn and shadow education secretary Angela Rayner. Hackney North MP and shadow home secretary Diane Abbott had been invited but was unable to attend.
Cllr Bramble said: "We need a system that's more manageable and meaningful."
She highlighted the support for the Labour Party's announcement it would scrap SATs and said she had reassured parents an alternative would be put in place that would also place emphasis on children enjoying learning.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here