diff --git a/staging/src/k8s.io/metrics/BUILD b/staging/src/k8s.io/metrics/BUILD
index 6e32ef7e84a..a5e9dcdda81 100644
--- a/staging/src/k8s.io/metrics/BUILD
+++ b/staging/src/k8s.io/metrics/BUILD
@@ -10,9 +10,7 @@ filegroup(
     srcs = [
         ":package-srcs",
         "//staging/src/k8s.io/metrics/hack:all-srcs",
-        "//staging/src/k8s.io/metrics/pkg/apis/custom_metrics:all-srcs",
-        "//staging/src/k8s.io/metrics/pkg/apis/external_metrics:all-srcs",
-        "//staging/src/k8s.io/metrics/pkg/apis/metrics:all-srcs",
+        "//staging/src/k8s.io/metrics/pkg/apis:all-srcs",
         "//staging/src/k8s.io/metrics/pkg/client/clientset/deprecated:all-srcs",
         "//staging/src/k8s.io/metrics/pkg/client/clientset/versioned:all-srcs",
         "//staging/src/k8s.io/metrics/pkg/client/clientset_test:all-srcs",
diff --git a/staging/src/k8s.io/metrics/pkg/apis/BUILD b/staging/src/k8s.io/metrics/pkg/apis/BUILD
new file mode 100644
index 00000000000..68f80499b0b
--- /dev/null
+++ b/staging/src/k8s.io/metrics/pkg/apis/BUILD
@@ -0,0 +1,41 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_test")
+
+go_test(
+    name = "go_default_test",
+    srcs = ["roundtrip_test.go"],
+    deps = [
+        "//staging/src/k8s.io/apimachinery/pkg/api/apitesting/fuzzer:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/api/apitesting/roundtrip:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/apis/meta/fuzzer:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/runtime/serializer:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/custom_metrics:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta1:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta2:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/external_metrics:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/external_metrics/v1beta1:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/metrics:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/metrics/v1alpha1:go_default_library",
+        "//staging/src/k8s.io/metrics/pkg/apis/metrics/v1beta1:go_default_library",
+        "//vendor/github.com/stretchr/testify/require:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//staging/src/k8s.io/metrics/pkg/apis/custom_metrics:all-srcs",
+        "//staging/src/k8s.io/metrics/pkg/apis/external_metrics:all-srcs",
+        "//staging/src/k8s.io/metrics/pkg/apis/metrics:all-srcs",
+    ],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)
diff --git a/staging/src/k8s.io/metrics/pkg/apis/roundtrip_test.go b/staging/src/k8s.io/metrics/pkg/apis/roundtrip_test.go
new file mode 100644
index 00000000000..3fb2c8a6e25
--- /dev/null
+++ b/staging/src/k8s.io/metrics/pkg/apis/roundtrip_test.go
@@ -0,0 +1,64 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package testing
+
+import (
+	"math/rand"
+	"testing"
+
+	custommetrics "k8s.io/metrics/pkg/apis/custom_metrics"
+	custommetricsv1beta1 "k8s.io/metrics/pkg/apis/custom_metrics/v1beta1"
+	custommetricsv1beta2 "k8s.io/metrics/pkg/apis/custom_metrics/v1beta2"
+	externalmetrics "k8s.io/metrics/pkg/apis/external_metrics"
+	externalmetricsv1beta1 "k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
+	metrics "k8s.io/metrics/pkg/apis/metrics"
+	metricsv1alpha1 "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
+	metricsv1beta1 "k8s.io/metrics/pkg/apis/metrics/v1beta1"
+
+	"github.com/stretchr/testify/require"
+	"k8s.io/apimachinery/pkg/api/apitesting/fuzzer"
+	"k8s.io/apimachinery/pkg/api/apitesting/roundtrip"
+	genericfuzzer "k8s.io/apimachinery/pkg/apis/meta/fuzzer"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/serializer"
+)
+
+var groups = []runtime.SchemeBuilder{
+	custommetrics.SchemeBuilder,
+	custommetricsv1beta1.SchemeBuilder,
+	custommetricsv1beta2.SchemeBuilder,
+	externalmetrics.SchemeBuilder,
+	externalmetricsv1beta1.SchemeBuilder,
+	metrics.SchemeBuilder,
+	metricsv1alpha1.SchemeBuilder,
+	metricsv1beta1.SchemeBuilder,
+}
+
+func TestRoundTripTypes(t *testing.T) {
+	scheme := runtime.NewScheme()
+	codecs := serializer.NewCodecFactory(scheme)
+	for _, builder := range groups {
+		require.NoError(t, builder.AddToScheme(scheme))
+	}
+	seed := rand.Int63()
+	// I'm only using the generic fuzzer funcs, but at some point in time we might need to
+	// switch to specialized. For now we're happy with the current serialization test.
+	fuzzer := fuzzer.FuzzerFor(genericfuzzer.Funcs, rand.NewSource(seed), codecs)
+
+	roundtrip.RoundTripExternalTypes(t, scheme, codecs, fuzzer, nil)
+	roundtrip.RoundTripTypes(t, scheme, codecs, fuzzer, nil)
+}