New research has found that only 4% of parents know that there are tests in five out of seven primary school years.
According to the report 74% of parents think children are under too much pressure.
A video has been released by the Brighton-based campaign group More than a Score.
It aims to raise awareness that primary school children are now among the most tested in the world.
The amount and type of formal testing is something that concerns many parents such as mum of three Viv Mudie from Southwick near Shoreham.
Michele Lawrie is the headteacher at St. Peter's Community Primary School in Portslade.
She says in her opinion the testing is too much for primary children.
Many parents say they are not against testing per se but some worry that with testing so heavily focused on numeracy and literacy, creativity is being lost and squeezed out and it is time for a rethink.