diff --git a/hack/.staticcheck_failures b/hack/.staticcheck_failures
index d2696ff9e1d..5fae0288da2 100644
--- a/hack/.staticcheck_failures
+++ b/hack/.staticcheck_failures
@@ -12,9 +12,6 @@ vendor/k8s.io/apimachinery/pkg/util/sets/types
 vendor/k8s.io/apimachinery/pkg/util/strategicpatch
 vendor/k8s.io/apimachinery/pkg/util/wait
 vendor/k8s.io/apiserver/pkg/endpoints/filters
-vendor/k8s.io/apiserver/pkg/endpoints/handlers
-vendor/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager
-vendor/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters
 vendor/k8s.io/apiserver/pkg/endpoints/metrics
 vendor/k8s.io/apiserver/pkg/registry/generic/registry
 vendor/k8s.io/apiserver/pkg/registry/generic/rest
diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/delete.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/delete.go
index 67fcd91f1e1..545ed897c2b 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/delete.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/delete.go
@@ -142,6 +142,7 @@ func DeleteResource(r rest.GracefulDeleter, allowsOptions bool, scope *RequestSc
 		// that will break existing clients.
 		// Other cases where resource is not instantly deleted are: namespace deletion
 		// and pod graceful deletion.
+		//lint:ignore SA1019 backwards compatibility
 		if !wasDeleted && options.OrphanDependents != nil && !*options.OrphanDependents {
 			status = http.StatusAccepted
 		}
diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager_test.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager_test.go
index 48ee9fd7a0e..d249e5f29a2 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager_test.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager/fieldmanager_test.go
@@ -55,6 +55,7 @@ type fakeObjectConvertor struct {
 	apiVersion fieldpath.APIVersion
 }
 
+//lint:ignore SA4009 backwards compatibility
 func (c *fakeObjectConvertor) Convert(in, out, context interface{}) error {
 	if typedValue, ok := in.(*typed.TypedValue); ok {
 		var err error
diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/errors_test.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/errors_test.go
index 4645a5f5701..a772a136ee5 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/errors_test.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/errors_test.go
@@ -83,6 +83,7 @@ func TestForbidden(t *testing.T) {
 		if result != test.expected {
 			t.Errorf("Forbidden response body(%#v...)\n expected: %v\ngot:       %v", test.attributes, test.expected, result)
 		}
+		//lint:ignore SA1019 backwards compatibility
 		resultType := observer.HeaderMap.Get("Content-Type")
 		if resultType != test.contentType {
 			t.Errorf("Forbidden content type(%#v...) != %#v, got %#v", test.attributes, test.expected, result)
diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
index 21adc12e297..16e16c35376 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
@@ -21,7 +21,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"strconv"
 	"strings"
@@ -244,8 +243,6 @@ func (w *deferredResponseWriter) Close() error {
 	return err
 }
 
-var nopCloser = ioutil.NopCloser(nil)
-
 // WriteObjectNegotiated renders an object in the content type negotiated by the client.
 func WriteObjectNegotiated(s runtime.NegotiatedSerializer, restrictions negotiation.EndpointRestrictions, gv schema.GroupVersion, w http.ResponseWriter, req *http.Request, statusCode int, object runtime.Object) {
 	stream, ok := object.(rest.ResourceStreamer)
diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers_test.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers_test.go
index 1a8d98be33c..febb88a7da2 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers_test.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers_test.go
@@ -64,7 +64,6 @@ func TestSerializeObjectParallel(t *testing.T) {
 
 		wantCode    int
 		wantHeaders http.Header
-		wantBody    []byte
 	}
 	newTest := func() test {
 		return test{