assertRecordedMetrics := func(names ...string) {
		t.Helper()
		want := sets.New(names...)
		got := sets.New(slices.Map(mt.Metrics(), func(e monitortest.Metric) string {
			return e.Name
		})...).Intersection(relevantMetrics)
		assert.Equal(t, want, got)
	}
	// derived gauge is always present
	assertRecordedMetrics()

	// Once we write it shows up