diff --git a/metrics_test.go b/metrics_test.go
new file mode 100644
index 000000000..f1eba364f
--- /dev/null
+++ b/metrics_test.go
@@ -0,0 +1,77 @@
+package toxiproxy
+
+import (
+	"bufio"
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/Shopify/toxiproxy/v2/collectors"
+	"github.com/Shopify/toxiproxy/v2/stream"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+func TestProxyMetricsReceivedSentBytes(t *testing.T) {
+	expectedMetrics := []string{
+		`toxiproxy_proxy_received_bytes_total{direction="upstream",listener="localhost:0",proxy="test",upstream="upstream"} 5`,
+		`toxiproxy_proxy_sent_bytes_total{direction="upstream",listener="localhost:0",proxy="test",upstream="upstream"} 5`,
+	}
+	srv := NewServer(NewMetricsContainer(prometheus.NewRegistry()))
+	srv.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors()
+	proxy := NewProxy(srv)
+	proxy.Name = "test"
+	proxy.Listen = "localhost:0"
+	proxy.Upstream = "upstream"
+	r := bufio.NewReader(bytes.NewBufferString("hello"))
+	w := &testWriteCloser{
+		bufio.NewWriter(bytes.NewBuffer([]byte{})),
+	}
+	proxy.Toxics.StartLink(srv, "testupstream", r, w, stream.Upstream)
+	gotMetrics := prometheusOutput(t, srv, "toxiproxy")
+	if !reflect.DeepEqual(gotMetrics, expectedMetrics) {
+		t.Fatalf("expected: %v got: %v", expectedMetrics, gotMetrics)
+	}
+}
+func TestRuntimeMetricsBuildInfo(t *testing.T) {
+	expectedMetrics := []string{
+		`go_build_info{checksum="unknown",path="unknown",version="unknown"} 1`,
+	}
+	srv := NewServer(NewMetricsContainer(prometheus.NewRegistry()))
+	srv.Metrics.RuntimeMetrics = collectors.NewRuntimeMetricCollectors()
+
+	gotMetrics := prometheusOutput(t, srv, "go_build_info")
+	if !reflect.DeepEqual(gotMetrics, expectedMetrics) {
+		t.Fatalf("expected: %v got: %v", expectedMetrics, gotMetrics)
+	}
+}
+
+type testWriteCloser struct {
+	*bufio.Writer
+}
+
+func (t *testWriteCloser) Close() error {
+	return t.Flush()
+}
+
+//prometheusOutput was originally copied from https://github.com/peterbourgon/fastly-exporter - thanks Peter
+func prometheusOutput(t *testing.T, apiServer *ApiServer, prefix string) []string {
+	t.Helper()
+
+	testServer := httptest.NewServer(apiServer.Metrics.handler())
+	defer testServer.Close()
+	resp, err := http.Get(testServer.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var selected []string
+	s := bufio.NewScanner(resp.Body)
+	for s.Scan() {
+		if strings.HasPrefix(s.Text(), prefix) {
+			selected = append(selected, s.Text())
+		}
+	}
+	return selected
+}
diff --git a/toxics/toxic_test.go b/toxics/toxic_test.go
index 426c91a93..78070cbde 100644
--- a/toxics/toxic_test.go
+++ b/toxics/toxic_test.go
@@ -25,7 +25,6 @@ func init() {
 func NewTestProxy(name, upstream string) *toxiproxy.Proxy {
 	srv := toxiproxy.NewServer(toxiproxy.NewMetricsContainer(prometheus.NewRegistry()))
 	srv.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors()
-	srv.Metrics.RuntimeMetrics = collectors.NewRuntimeMetricCollectors()
 	proxy := toxiproxy.NewProxy(srv)
 
 	proxy.Name = name
diff --git a/toxiproxy_test.go b/toxiproxy_test.go
index 867bcd09c..16a1f03f7 100644
--- a/toxiproxy_test.go
+++ b/toxiproxy_test.go
@@ -13,7 +13,6 @@ import (
 func NewTestProxy(name, upstream string) *toxiproxy.Proxy {
 	srv := toxiproxy.NewServer(toxiproxy.NewMetricsContainer(prometheus.NewRegistry()))
 	srv.Metrics.ProxyMetrics = collectors.NewProxyMetricCollectors()
-	srv.Metrics.RuntimeMetrics = collectors.NewRuntimeMetricCollectors()
 	proxy := toxiproxy.NewProxy(srv)
 
 	proxy.Name = name