diff --git a/client_server_http2_test.go b/client_server_http2_test.go
new file mode 100644
index 0000000..cd508d6
--- /dev/null
+++ b/client_server_http2_test.go
@@ -0,0 +1,50 @@
+// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.14
+// +build go1.14
+
+package websocket
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestNextProtos(t *testing.T) {
+	ts := httptest.NewUnstartedServer(
+		http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}),
+	)
+	ts.EnableHTTP2 = true
+	ts.StartTLS()
+	defer ts.Close()
+
+	d := Dialer{
+		TLSClientConfig: ts.Client().Transport.(*http.Transport).TLSClientConfig,
+	}
+
+	r, err := ts.Client().Get(ts.URL)
+	if err != nil {
+		t.Fatalf("Get: %v", err)
+	}
+	r.Body.Close()
+
+	// Asserts that Dialer.TLSClientConfig.NextProtos contains "h2"
+	// after the Client.Get call from net/http above.
+	var containsHTTP2 bool = false
+	for _, proto := range d.TLSClientConfig.NextProtos {
+		if proto == "h2" {
+			containsHTTP2 = true
+		}
+	}
+	if !containsHTTP2 {
+		t.Fatalf("Dialer.TLSClientConfig.NextProtos does not contain \"h2\"")
+	}
+
+	_, _, err = d.Dial(makeWsProto(ts.URL), nil)
+	if err == nil {
+		t.Fatalf("Dial succeeded, expect fail ")
+	}
+}
diff --git a/client_server_test.go b/client_server_test.go
index f6a0664..e975e51 100644
--- a/client_server_test.go
+++ b/client_server_test.go
@@ -1098,39 +1098,3 @@ func TestNetDialConnect(t *testing.T) {
 		}
 	}
 }
-
-func TestNextProtos(t *testing.T) {
-	ts := httptest.NewUnstartedServer(
-		http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}),
-	)
-	ts.EnableHTTP2 = true
-	ts.StartTLS()
-	defer ts.Close()
-
-	d := Dialer{
-		TLSClientConfig: ts.Client().Transport.(*http.Transport).TLSClientConfig,
-	}
-
-	r, err := ts.Client().Get(ts.URL)
-	if err != nil {
-		t.Fatalf("Get: %v", err)
-	}
-	r.Body.Close()
-
-	// Asserts that Dialer.TLSClientConfig.NextProtos contains "h2"
-	// after the Client.Get call from net/http above.
-	var containsHTTP2 bool = false
-	for _, proto := range d.TLSClientConfig.NextProtos {
-		if proto == "h2" {
-			containsHTTP2 = true
-		}
-	}
-	if !containsHTTP2 {
-		t.Fatalf("Dialer.TLSClientConfig.NextProtos does not contain \"h2\"")
-	}
-
-	_, _, err = d.Dial(makeWsProto(ts.URL), nil)
-	if err == nil {
-		t.Fatalf("Dial succeeded, expect fail ")
-	}
-}