diff --git a/kyaml/kio/filters/fmtr_test.go b/kyaml/kio/filters/fmtr_test.go
index ca1f2a276..fc462dcfb 100644
--- a/kyaml/kio/filters/fmtr_test.go
+++ b/kyaml/kio/filters/fmtr_test.go
@@ -578,6 +578,10 @@ func TestFormatInput_resources(t *testing.T) {
 	assert.NoError(t, err)
 	_, err = io.Copy(input, bytes.NewReader(testyaml.UnformattedYaml2))
 	assert.NoError(t, err)
+	_, err = io.Copy(input, strings.NewReader("---\n"))
+	assert.NoError(t, err)
+	_, err = io.Copy(input, bytes.NewReader(testyaml.UnformattedYaml3))
+	assert.NoError(t, err)
 
 	expectedOutput := &bytes.Buffer{}
 	_, err = io.Copy(expectedOutput, bytes.NewReader(testyaml.FormattedYaml1))
@@ -586,6 +590,10 @@ func TestFormatInput_resources(t *testing.T) {
 	assert.NoError(t, err)
 	_, err = io.Copy(expectedOutput, bytes.NewReader(testyaml.FormattedYaml2))
 	assert.NoError(t, err)
+	_, err = io.Copy(expectedOutput, strings.NewReader("---\n"))
+	assert.NoError(t, err)
+	_, err = io.Copy(expectedOutput, bytes.NewReader(testyaml.FormattedYaml3))
+	assert.NoError(t, err)
 
 	s, err := FormatInput(input)
 	assert.NoError(t, err)
diff --git a/kyaml/kio/filters/testyaml/testyaml.go b/kyaml/kio/filters/testyaml/testyaml.go
index 4052e5ffb..9f9d893d8 100644
--- a/kyaml/kio/filters/testyaml/testyaml.go
+++ b/kyaml/kio/filters/testyaml/testyaml.go
@@ -27,6 +27,67 @@ apiVersion: example.com/v1beta1
 kind: MyType2
 `)
 
+var UnformattedYaml3 = []byte(`
+apiVersion: v1
+items:
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    creationTimestamp: "2020-06-04T07:17:23Z"
+    name: kit-server-dev
+    resourceVersion: "7881"
+    selfLink: /api/v1/namespaces/kit-server-dev
+    uid: 6f8e0a69-a633-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    creationTimestamp: "2020-06-04T06:50:06Z"
+    name: kube-node-lease
+    resourceVersion: "40"
+    selfLink: /api/v1/namespaces/kube-node-lease
+    uid: 9fa5de74-a62f-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    creationTimestamp: "2020-06-04T06:50:05Z"
+    name: kube-public
+    resourceVersion: "26"
+    selfLink: /api/v1/namespaces/kube-public
+    uid: 9f6f664f-a62f-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    creationTimestamp: "2020-06-04T06:50:05Z"
+    name: kube-system
+    resourceVersion: "143"
+    selfLink: /api/v1/namespaces/kube-system
+    uid: 9f4b398b-a62f-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+kind: List
+metadata:
+  resourceVersion: ""
+  selfLink: ""
+`)
+
 var UnformattedJSON1 = []byte(`
 {
   "spec": "a",
@@ -69,3 +130,64 @@ var FormattedJSON1 = []byte(`{
   }
 }
 `)
+
+var FormattedYaml3 = []byte(`apiVersion: v1
+kind: List
+metadata:
+  resourceVersion: ""
+  selfLink: ""
+items:
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    name: kit-server-dev
+    creationTimestamp: "2020-06-04T07:17:23Z"
+    resourceVersion: "7881"
+    selfLink: /api/v1/namespaces/kit-server-dev
+    uid: 6f8e0a69-a633-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    name: kube-node-lease
+    creationTimestamp: "2020-06-04T06:50:06Z"
+    resourceVersion: "40"
+    selfLink: /api/v1/namespaces/kube-node-lease
+    uid: 9fa5de74-a62f-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    name: kube-public
+    creationTimestamp: "2020-06-04T06:50:05Z"
+    resourceVersion: "26"
+    selfLink: /api/v1/namespaces/kube-public
+    uid: 9f6f664f-a62f-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+- apiVersion: v1
+  kind: Namespace
+  metadata:
+    name: kube-system
+    creationTimestamp: "2020-06-04T06:50:05Z"
+    resourceVersion: "143"
+    selfLink: /api/v1/namespaces/kube-system
+    uid: 9f4b398b-a62f-11ea-b632-42010a8000a7
+  spec:
+    finalizers:
+    - kubernetes
+  status:
+    phase: Active
+`)
+