Some of DP Ruto's men to be replaced with nominees of Raila, Gideon, Kalonzo and Mudavadi.
Mr Muturi told the lawmakers to ensure they go for the tests before interacting with their constituents.
Firm comes under scrutiny following claims by a number of Kenyans that results of its Covid-19 tests are not credible.
Country recorded a high number of pneumonia cases at the start of this year.
Three more people have died from Covid-19, bringing total virus deaths in the country to 152.