diff --git a/pkg/tlsutil/cipher_suites.go b/pkg/tlsutil/cipher_suites.go
index f278a61f8..eac2497c9 100644
--- a/pkg/tlsutil/cipher_suites.go
+++ b/pkg/tlsutil/cipher_suites.go
@@ -1,3 +1,5 @@
+// +build !go1.15
+
 // Copyright 2018 The etcd Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,24 +18,36 @@ package tlsutil
 
 import "crypto/tls"
 
+// cipher suites implemented by Go
+// https://github.com/golang/go/blob/dev.boringcrypto.go1.10/src/crypto/tls/cipher_suites.go
+var cipherSuites = map[string]uint16{
+	"TLS_RSA_WITH_RC4_128_SHA":                tls.TLS_RSA_WITH_RC4_128_SHA,
+	"TLS_RSA_WITH_3DES_EDE_CBC_SHA":           tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
+	"TLS_RSA_WITH_AES_128_CBC_SHA":            tls.TLS_RSA_WITH_AES_128_CBC_SHA,
+	"TLS_RSA_WITH_AES_256_CBC_SHA":            tls.TLS_RSA_WITH_AES_256_CBC_SHA,
+	"TLS_RSA_WITH_AES_128_CBC_SHA256":         tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
+	"TLS_RSA_WITH_AES_128_GCM_SHA256":         tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
+	"TLS_RSA_WITH_AES_256_GCM_SHA384":         tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
+	"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA":        tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
+	"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA":    tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+	"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA":    tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+	"TLS_ECDHE_RSA_WITH_RC4_128_SHA":          tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
+	"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA":     tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
+	"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA":      tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+	"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA":      tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+	"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
+	"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256":   tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
+	"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256":   tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+	"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+	"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384":   tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+	"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+	"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305":    tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
+	"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305":  tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
+}
+
 // GetCipherSuite returns the corresponding cipher suite,
 // and boolean value if it is supported.
 func GetCipherSuite(s string) (uint16, bool) {
-	for _, c := range tls.CipherSuites() {
-		if s == c.Name {
-			return c.ID, true
-		}
-	}
-	for _, c := range tls.InsecureCipherSuites() {
-		if s == c.Name {
-			return c.ID, true
-		}
-	}
-	switch s {
-	case "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305":
-		return tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, true
-	case "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305":
-		return tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, true
-	}
-	return 0, false
+	v, ok := cipherSuites[s]
+	return v, ok
 }
diff --git a/pkg/tlsutil/cipher_suites_go1.15.go b/pkg/tlsutil/cipher_suites_go1.15.go
new file mode 100644
index 000000000..de2044214
--- /dev/null
+++ b/pkg/tlsutil/cipher_suites_go1.15.go
@@ -0,0 +1,41 @@
+// +build go1.15
+
+// Copyright 2018 The etcd 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 tlsutil
+
+import "crypto/tls"
+
+// GetCipherSuite returns the corresponding cipher suite,
+// and boolean value if it is supported.
+func GetCipherSuite(s string) (uint16, bool) {
+	for _, c := range tls.CipherSuites() {
+		if s == c.Name {
+			return c.ID, true
+		}
+	}
+	for _, c := range tls.InsecureCipherSuites() {
+		if s == c.Name {
+			return c.ID, true
+		}
+	}
+	switch s {
+	case "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305":
+		return tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, true
+	case "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305":
+		return tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, true
+	}
+	return 0, false
+}
diff --git a/pkg/tlsutil/cipher_suites_go1.15_test.go b/pkg/tlsutil/cipher_suites_go1.15_test.go
new file mode 100644
index 000000000..c00eef373
--- /dev/null
+++ b/pkg/tlsutil/cipher_suites_go1.15_test.go
@@ -0,0 +1,52 @@
+// +build go1.15
+
+// Copyright 2018 The etcd 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 tlsutil
+
+import (
+	"crypto/tls"
+	"testing"
+)
+
+func TestGetCipherSuite_not_existing(t *testing.T) {
+	_, ok := GetCipherSuite("not_existing")
+	if ok {
+		t.Fatal("Expected not ok")
+	}
+}
+
+func CipherSuiteExpectedToExist(tb testing.TB, cipher string, expectedId uint16) {
+	vid, ok := GetCipherSuite(cipher)
+	if !ok {
+		tb.Errorf("Expected %v cipher to exist", cipher)
+	}
+	if vid != expectedId {
+		tb.Errorf("For %v expected=%v found=%v", cipher, expectedId, vid)
+	}
+}
+
+func TestGetCipherSuite_success(t *testing.T) {
+	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA)
+	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256)
+
+	// Explicit test for legacy names
+	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305", tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256)
+	CipherSuiteExpectedToExist(t, "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305", tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256)
+}
+
+func TestGetCipherSuite_insecure(t *testing.T) {
+	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_RC4_128_SHA", tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA)
+}
diff --git a/pkg/tlsutil/cipher_suites_test.go b/pkg/tlsutil/cipher_suites_test.go
index a17b46c2f..4b60cff05 100644
--- a/pkg/tlsutil/cipher_suites_test.go
+++ b/pkg/tlsutil/cipher_suites_test.go
@@ -1,3 +1,5 @@
+// +build !go1.15
+
 // Copyright 2018 The etcd Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,36 +17,28 @@
 package tlsutil
 
 import (
-	"crypto/tls"
+	"go/importer"
+	"reflect"
+	"strings"
 	"testing"
 )
 
-func TestGetCipherSuite_not_existing(t *testing.T) {
-	_, ok := GetCipherSuite("not_existing")
-	if ok {
-		t.Fatal("Expected not ok")
+func TestGetCipherSuites(t *testing.T) {
+	pkg, err := importer.For("source", nil).Import("crypto/tls")
+	if err != nil {
+		t.Fatal(err)
+	}
+	cm := make(map[string]uint16)
+	for _, s := range pkg.Scope().Names() {
+		if strings.HasPrefix(s, "TLS_RSA_") || strings.HasPrefix(s, "TLS_ECDHE_") {
+			v, ok := GetCipherSuite(s)
+			if !ok {
+				t.Fatalf("Go implements missing cipher suite %q (%v)", s, v)
+			}
+			cm[s] = v
+		}
+	}
+	if !reflect.DeepEqual(cm, cipherSuites) {
+		t.Fatalf("found unmatched cipher suites %v (Go) != %v", cm, cipherSuites)
 	}
 }
-
-func CipherSuiteExpectedToExist(tb testing.TB, cipher string, expectedId uint16) {
-	vid, ok := GetCipherSuite(cipher)
-	if !ok {
-		tb.Errorf("Expected %v cipher to exist", cipher)
-	}
-	if vid != expectedId {
-		tb.Errorf("For %v expected=%v found=%v", cipher, expectedId, vid)
-	}
-}
-
-func TestGetCipherSuite_success(t *testing.T) {
-	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA)
-	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256)
-
-	// Explicit test for legacy names
-	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305", tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256)
-	CipherSuiteExpectedToExist(t, "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305", tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256)
-}
-
-func TestGetCipherSuite_insecure(t *testing.T) {
-	CipherSuiteExpectedToExist(t, "TLS_ECDHE_RSA_WITH_RC4_128_SHA", tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA)
-}