load_test.js

import {sleep} from "k6";
import mainPageUserFlow from "../cases/main-page";
import billingUserFlow from "../cases/billing";

export let options = {
  thresholds: {
    "group_duration{group:::mainPageGroup}": ["p(99)<300"],
    "group_duration{group:::billingGroup}": ["p(99)<300"]
  }
};

export default function() {
  group("mainPageGroup", function() {
     mainPageUserFlow();
  });
  group("billingGroup", function() {
     billingUserFlow();
  });
  sleep(2);
}

Proposal to modify the group tag syntax.

grafana/k6#948