diff --git a/etcdserver/api/rafthttp/transport.go b/etcdserver/api/rafthttp/transport.go
index e52acfceb..78b159565 100644
--- a/etcdserver/api/rafthttp/transport.go
+++ b/etcdserver/api/rafthttp/transport.go
@@ -130,7 +130,7 @@ type Transport struct {
 	remotes map[types.ID]*remote // remotes map that helps newly joined member to catch up
 	peers   map[types.ID]Peer    // peers map
 
-	prober probing.Prober
+	pipelineProber probing.Prober
 }
 
 func (t *Transport) Start() error {
@@ -145,7 +145,7 @@ func (t *Transport) Start() error {
 	}
 	t.remotes = make(map[types.ID]*remote)
 	t.peers = make(map[types.ID]Peer)
-	t.prober = probing.NewProber(t.pipelineRt)
+	t.pipelineProber = probing.NewProber(t.pipelineRt)
 
 	// If client didn't provide dial retry frequency, use the default
 	// (100ms backoff between attempts to create a new stream),
@@ -221,7 +221,7 @@ func (t *Transport) Stop() {
 	for _, p := range t.peers {
 		p.stop()
 	}
-	t.prober.RemoveAll()
+	t.pipelineProber.RemoveAll()
 	if tr, ok := t.streamRt.(*http.Transport); ok {
 		tr.CloseIdleConnections()
 	}
@@ -317,7 +317,7 @@ func (t *Transport) AddPeer(id types.ID, us []string) {
 	}
 	fs := t.LeaderStats.Follower(id.String())
 	t.peers[id] = startPeer(t, urls, id, fs)
-	addPeerToProber(t.Logger, t.prober, id.String(), us)
+	addPeerToProber(t.Logger, t.pipelineProber, id.String(), us)
 
 	if t.Logger != nil {
 		t.Logger.Info(
@@ -358,7 +358,7 @@ func (t *Transport) removePeer(id types.ID) {
 	}
 	delete(t.peers, id)
 	delete(t.LeaderStats.Followers, id.String())
-	t.prober.Remove(id.String())
+	t.pipelineProber.Remove(id.String())
 
 	if t.Logger != nil {
 		t.Logger.Info(
@@ -388,8 +388,8 @@ func (t *Transport) UpdatePeer(id types.ID, us []string) {
 	}
 	t.peers[id].update(urls)
 
-	t.prober.Remove(id.String())
-	addPeerToProber(t.Logger, t.prober, id.String(), us)
+	t.pipelineProber.Remove(id.String())
+	addPeerToProber(t.Logger, t.pipelineProber, id.String(), us)
 
 	if t.Logger != nil {
 		t.Logger.Info(
diff --git a/etcdserver/api/rafthttp/transport_test.go b/etcdserver/api/rafthttp/transport_test.go
index 9a58ce74f..ef208ef8e 100644
--- a/etcdserver/api/rafthttp/transport_test.go
+++ b/etcdserver/api/rafthttp/transport_test.go
@@ -97,10 +97,10 @@ func TestTransportCutMend(t *testing.T) {
 func TestTransportAdd(t *testing.T) {
 	ls := stats.NewLeaderStats("")
 	tr := &Transport{
-		LeaderStats: ls,
-		streamRt:    &roundTripperRecorder{},
-		peers:       make(map[types.ID]Peer),
-		prober:      probing.NewProber(nil),
+		LeaderStats:    ls,
+		streamRt:       &roundTripperRecorder{},
+		peers:          make(map[types.ID]Peer),
+		pipelineProber: probing.NewProber(nil),
 	}
 	tr.AddPeer(1, []string{"http://localhost:2380"})
 
@@ -125,10 +125,10 @@ func TestTransportAdd(t *testing.T) {
 
 func TestTransportRemove(t *testing.T) {
 	tr := &Transport{
-		LeaderStats: stats.NewLeaderStats(""),
-		streamRt:    &roundTripperRecorder{},
-		peers:       make(map[types.ID]Peer),
-		prober:      probing.NewProber(nil),
+		LeaderStats:    stats.NewLeaderStats(""),
+		streamRt:       &roundTripperRecorder{},
+		peers:          make(map[types.ID]Peer),
+		pipelineProber: probing.NewProber(nil),
 	}
 	tr.AddPeer(1, []string{"http://localhost:2380"})
 	tr.RemovePeer(types.ID(1))
@@ -142,8 +142,8 @@ func TestTransportRemove(t *testing.T) {
 func TestTransportUpdate(t *testing.T) {
 	peer := newFakePeer()
 	tr := &Transport{
-		peers:  map[types.ID]Peer{types.ID(1): peer},
-		prober: probing.NewProber(nil),
+		peers:          map[types.ID]Peer{types.ID(1): peer},
+		pipelineProber: probing.NewProber(nil),
 	}
 	u := "http://localhost:2380"
 	tr.UpdatePeer(types.ID(1), []string{u})
@@ -156,13 +156,13 @@ func TestTransportUpdate(t *testing.T) {
 func TestTransportErrorc(t *testing.T) {
 	errorc := make(chan error, 1)
 	tr := &Transport{
-		Raft:        &fakeRaft{},
-		LeaderStats: stats.NewLeaderStats(""),
-		ErrorC:      errorc,
-		streamRt:    newRespRoundTripper(http.StatusForbidden, nil),
-		pipelineRt:  newRespRoundTripper(http.StatusForbidden, nil),
-		peers:       make(map[types.ID]Peer),
-		prober:      probing.NewProber(nil),
+		Raft:           &fakeRaft{},
+		LeaderStats:    stats.NewLeaderStats(""),
+		ErrorC:         errorc,
+		streamRt:       newRespRoundTripper(http.StatusForbidden, nil),
+		pipelineRt:     newRespRoundTripper(http.StatusForbidden, nil),
+		peers:          make(map[types.ID]Peer),
+		pipelineProber: probing.NewProber(nil),
 	}
 	tr.AddPeer(1, []string{"http://localhost:2380"})
 	defer tr.Stop()