self-signed codesigning certificate? (mac)

I created a certificate via keychain access > certificate assistant > create a certificate. (in the login keychain)

name: My Test Certificate
identity type: self signed root
certificate type: code signing

Then I type the following in the terminal before building;

export CSC_NAME="My Test Certificate" But output is:

Identity name "My Test Certificate" is specified, but no valid identity with this name in the keychain

What is the problem? Is it not possible to use a self-signed certificate?

[develar]

develar-home-imac:onshape-desktop-shell develar$ security find-identity -v -p codesigning
  1) 5160729A078E4EF0401986C2328E4D3BD55FFE0E "Test Test"
  2) 32F67D8F957E740C692ADD8CD5A5E463992193DD "Vladimir Krivosheev"
     2 valid identities found

[antoniobrandao]

@develar that solved it, thanks ! ❤️