Flag to disable 'Cookies without SameSite must be secure' when launching chrome

I need to launch chrome with 'Cookies without SameSite must be secure' turned off for our automated test suite. We're already using the --disable-web-security flag but that does not work. I also tried different permutations of --disable-features=same-site-by-default-cookies but I don't seem to have the feature name correct. What flag to I need to add to chrome launcher to ensure this is disabled?