Download latest nightly build

https://download.eclipse.org/ee4j/jakartaee-tck/8.0.1/nightly/eltck-3.0_latest.zip

Extract to EL_TCK_HOME

Edit $EL_TCK_HOME/bin/ts.jte

You'll need to set the following properties (adjust the paths for your environment)

el.classes=/home/mark/repos/asf-public/tomcat/trunk/output/build/lib/el-api.jar:/home/mark/repos/asf-public/tomcat/trunk/output/build/lib/jasper-el.jar

variable.mapper=org.apache.el.lang.VariableMapperImpl

Run ant gui

Accept the defaults and then run the tests