This is very confusing as seen in #12974 or #12906. My suggestion would be "legacy."
"browsertest",
  gulp.series("testing-pre", "generic", "components", function () {
    return createTestSource("browser");
  })
);
gulp.task(
  "unittest",
  gulp.series("testing-pre", "generic", function () {
    return createTestSource("unit");
  })
);
gulp.task(
  "integrationtest",
  gulp.series("testing-pre", "generic", function () {
    return createTestSource("integration");
  })
);
gulp.task(
  "fonttest",
  gulp.series("testing-pre", function () {
    return createTestSource("font");
  })
);
gulp.task(
  "makeref",
  gulp.series("testing-pre", "generic", "components", function (done) {
    makeRef(done);
  })
);
gulp.task(