Pass arguments from npm script to bash shell script

package.json:

"scripts": {
  "test": "bash test.sh"
},

test.sh:

#!/bin/bash
for i in "$@"
do
case $i in
    -l=*|--lib=*)
    LIBPATH="${i#*=}"
    shift # past argument=value
    ;;
    --default)
    DEFAULT=YES
    shift # past argument with no value
    ;;
    *)
            # unknown option
    ;;
esac
done
echo "LIBRARY PATH    = ${LIBPATH}"

Tried invoking: npm run test -l=/usr/lib, ain't working though.