diff --git a/p2p/stream/common/requestmanager/interface_test.go b/p2p/stream/common/requestmanager/interface_test.go
index 01e8c595a..57ffe3355 100644
--- a/p2p/stream/common/requestmanager/interface_test.go
+++ b/p2p/stream/common/requestmanager/interface_test.go
@@ -14,19 +14,25 @@ import (
 var testProtoID = sttypes.ProtoID("harmony/sync/unitest/0/1.0.0")
 
 type testStreamManager struct {
+	streams map[sttypes.StreamID]sttypes.Stream
+
 	newStreamFeed event.Feed
 	rmStreamFeed  event.Feed
 }
 
 func newTestStreamManager() *testStreamManager {
-	return &testStreamManager{}
+	return &testStreamManager{
+		streams: make(map[sttypes.StreamID]sttypes.Stream),
+	}
 }
 
 func (sm *testStreamManager) addNewStream(st sttypes.Stream) {
+	sm.streams[st.ID()] = st
 	sm.newStreamFeed.Send(streammanager.EvtStreamAdded{Stream: st})
 }
 
 func (sm *testStreamManager) rmStream(stid sttypes.StreamID) {
+	delete(sm.streams, stid)
 	sm.rmStreamFeed.Send(streammanager.EvtStreamRemoved{ID: stid})
 }
 
@@ -38,6 +44,20 @@ func (sm *testStreamManager) SubscribeRemoveStreamEvent(ch chan<- streammanager.
 	return sm.rmStreamFeed.Subscribe(ch)
 }
 
+func (sm *testStreamManager) GetStreams() []sttypes.Stream {
+	sts := make([]sttypes.Stream, 0, len(sm.streams))
+
+	for _, st := range sm.streams {
+		sts = append(sts, st)
+	}
+	return sts
+}
+
+func (sm *testStreamManager) GetStreamByID(id sttypes.StreamID) (sttypes.Stream, bool) {
+	st, exist := sm.streams[id]
+	return st, exist
+}
+
 type testStream struct {
 	id      sttypes.StreamID
 	rm      *requestManager
@@ -79,6 +99,29 @@ func (st *testStream) ResetOnClose() error {
 	return nil
 }
 
+func makeDummyTestStreams(indexes []int) []sttypes.Stream {
+	sts := make([]sttypes.Stream, 0, len(indexes))
+
+	for _, index := range indexes {
+		sts = append(sts, &testStream{
+			id: makeStreamID(index),
+		})
+	}
+	return sts
+}
+
+func makeDummyStreamSets(indexes []int) map[sttypes.StreamID]*stream {
+	m := make(map[sttypes.StreamID]*stream)
+
+	for _, index := range indexes {
+		st := &testStream{
+			id: makeStreamID(index),
+		}
+		m[st.ID()] = &stream{Stream: st}
+	}
+	return m
+}
+
 func makeStreamID(index int) sttypes.StreamID {
 	return sttypes.StreamID(strconv.Itoa(index))
 }
diff --git a/p2p/stream/common/requestmanager/requestmanager_test.go b/p2p/stream/common/requestmanager/requestmanager_test.go
index a81bdf202..01638f6b9 100644
--- a/p2p/stream/common/requestmanager/requestmanager_test.go
+++ b/p2p/stream/common/requestmanager/requestmanager_test.go
@@ -2,6 +2,7 @@ package requestmanager
 
 import (
 	"context"
+	"fmt"
 	"sync"
 	"sync/atomic"
 	"testing"
@@ -303,6 +304,95 @@ func TestGenReqID(t *testing.T) {
 	}
 }
 
+func TestCheckStreamUpdates(t *testing.T) {
+	tests := []struct {
+		exists            map[sttypes.StreamID]*stream
+		targets           []sttypes.Stream
+		expAddedIndexes   []int
+		expRemovedIndexes []int
+	}{
+		{
+			exists:            makeDummyStreamSets([]int{1, 2, 3, 4, 5}),
+			targets:           makeDummyTestStreams([]int{2, 3, 4, 5}),
+			expAddedIndexes:   []int{},
+			expRemovedIndexes: []int{1},
+		},
+		{
+			exists:            makeDummyStreamSets([]int{1, 2, 3, 4, 5}),
+			targets:           makeDummyTestStreams([]int{1, 2, 3, 4, 5, 6}),
+			expAddedIndexes:   []int{6},
+			expRemovedIndexes: []int{},
+		},
+		{
+			exists:            makeDummyStreamSets([]int{}),
+			targets:           makeDummyTestStreams([]int{}),
+			expAddedIndexes:   []int{},
+			expRemovedIndexes: []int{},
+		},
+		{
+			exists:            makeDummyStreamSets([]int{}),
+			targets:           makeDummyTestStreams([]int{1, 2, 3, 4, 5}),
+			expAddedIndexes:   []int{1, 2, 3, 4, 5},
+			expRemovedIndexes: []int{},
+		},
+		{
+			exists:            makeDummyStreamSets([]int{1, 2, 3, 4, 5}),
+			targets:           makeDummyTestStreams([]int{}),
+			expAddedIndexes:   []int{},
+			expRemovedIndexes: []int{1, 2, 3, 4, 5},
+		},
+		{
+			exists:            makeDummyStreamSets([]int{1, 2, 3, 4, 5}),
+			targets:           makeDummyTestStreams([]int{6, 7, 8, 9, 10}),
+			expAddedIndexes:   []int{6, 7, 8, 9, 10},
+			expRemovedIndexes: []int{1, 2, 3, 4, 5},
+		},
+	}
+
+	for i, test := range tests {
+		added, removed := checkStreamUpdates(test.exists, test.targets)
+
+		if err := checkStreamIDsEqual(added, test.expAddedIndexes); err != nil {
+			t.Errorf("Test %v: check added: %v", i, err)
+		}
+		if err := checkStreamIDsEqual2(removed, test.expRemovedIndexes); err != nil {
+			t.Errorf("Test %v: check removed: %v", i, err)
+		}
+	}
+}
+
+func checkStreamIDsEqual(sts []sttypes.Stream, expIndexes []int) error {
+	if len(sts) != len(expIndexes) {
+		return fmt.Errorf("size not equal")
+	}
+	expM := make(map[sttypes.StreamID]struct{})
+	for _, index := range expIndexes {
+		expM[makeStreamID(index)] = struct{}{}
+	}
+	for _, st := range sts {
+		if _, ok := expM[st.ID()]; !ok {
+			return fmt.Errorf("stream not exist in exp: %v", st.ID())
+		}
+	}
+	return nil
+}
+
+func checkStreamIDsEqual2(sts []*stream, expIndexes []int) error {
+	if len(sts) != len(expIndexes) {
+		return fmt.Errorf("size not equal")
+	}
+	expM := make(map[sttypes.StreamID]struct{})
+	for _, index := range expIndexes {
+		expM[makeStreamID(index)] = struct{}{}
+	}
+	for _, st := range sts {
+		if _, ok := expM[st.ID()]; !ok {
+			return fmt.Errorf("stream not exist in exp: %v", st.ID())
+		}
+	}
+	return nil
+}
+
 type testSuite struct {
 	rm          *requestManager
 	sm          *testStreamManager
@@ -330,7 +420,8 @@ func newTestSuite(delayF delayFunc, respF responseFunc, numStreams int) *testSui
 		cancel:      cancel,
 	}
 	for i := 0; i != numStreams; i++ {
-		ts.bootStreams = append(ts.bootStreams, ts.makeTestStream(i))
+		st := ts.makeTestStream(i)
+		ts.bootStreams = append(ts.bootStreams, st)
 	}
 	return ts
 }