diff --git a/internal/internal.go b/internal/internal.go
new file mode 100644
index 0000000..5489143
--- /dev/null
+++ b/internal/internal.go
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package internal contains gRPC-internal code for testing, to avoid polluting
+// the godoc of the top-level grpc package.
+package internal
+
+// TestingCloseConns closes all existing transports but keeps
+// grpcServer.lis accepting new connections.
+//
+// The provided grpcServer must be of type *grpc.Server. It is untyped
+// for circular dependency reasons.
+var TestingCloseConns func(grpcServer interface{})
+
+// TestingUseHandlerImpl enables the http.Handler-based server implementation.
+// It must be called before Serve and requires TLS credentials.
+//
+// The provided grpcServer must be of type *grpc.Server. It is untyped
+// for circular dependency reasons.
+var TestingUseHandlerImpl func(grpcServer interface{})
diff --git a/server.go b/server.go
index 79124e1..927b1c5 100644
--- a/server.go
+++ b/server.go
@@ -52,6 +52,7 @@
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/transport"
 )
@@ -705,10 +706,18 @@
 	s.mu.Unlock()
 }
 
-// TestingCloseConns closes all exiting transports but keeps s.lis accepting new
-// connections.
-// This is only for tests and is subject to removal.
-func (s *Server) TestingCloseConns() {
+func init() {
+	internal.TestingCloseConns = func(arg interface{}) {
+		arg.(*Server).testingCloseConns()
+	}
+	internal.TestingUseHandlerImpl = func(arg interface{}) {
+		arg.(*Server).opts.useHandlerImpl = true
+	}
+}
+
+// testingCloseConns closes all existing transports but keeps s.lis
+// accepting new connections.
+func (s *Server) testingCloseConns() {
 	s.mu.Lock()
 	for c := range s.conns {
 		c.Close()
@@ -717,13 +726,6 @@
 	s.mu.Unlock()
 }
 
-// TestingUseHandlerImpl enables the http.Handler-based server implementation.
-// It must be called before Serve and requires TLS credentials.
-// This is only for tests and is subject to removal.
-func (s *Server) TestingUseHandlerImpl() {
-	s.opts.useHandlerImpl = true
-}
-
 // SendHeader sends header metadata. It may be called at most once from a unary
 // RPC handler. The ctx is the RPC handler's Context or one derived from it.
 func SendHeader(ctx context.Context, md metadata.MD) error {
diff --git a/test/end2end_test.go b/test/end2end_test.go
index 3104e8e..86c921f 100644
--- a/test/end2end_test.go
+++ b/test/end2end_test.go
@@ -62,6 +62,7 @@
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/health"
 	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/internal"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
 	testpb "google.golang.org/grpc/test/grpc_testing"
@@ -484,7 +485,7 @@
 	s := grpc.NewServer(sopts...)
 	te.srv = s
 	if e.httpHandler {
-		s.TestingUseHandlerImpl()
+		internal.TestingUseHandlerImpl(s)
 	}
 	if te.healthServer != nil {
 		healthpb.RegisterHealthServer(s, te.healthServer)
@@ -958,7 +959,7 @@
 		// The server shuts down the network connection to make a
 		// transport error which will be detected by the client side
 		// code.
-		te.srv.TestingCloseConns()
+		internal.TestingCloseConns(te.srv)
 		wg.Done()
 	}()
 	// All these RPCs should succeed eventually.