diff --git a/testing/scenarios/shadowsocks_test.go b/testing/scenarios/shadowsocks_test.go
index fbafa6cb5..f856610d8 100644
--- a/testing/scenarios/shadowsocks_test.go
+++ b/testing/scenarios/shadowsocks_test.go
@@ -126,7 +126,7 @@ func TestShadowsocksAES256TCP(t *testing.T) {
 			assert.Error(err).IsNil()
 			assert.Int(nBytes).Equals(len(payload))
 
-			response := readFrom(conn, time.Second*10, 10240*1024)
+			response := readFrom(conn, time.Second*20, 10240*1024)
 			assert.Bytes(response).Equals(xor([]byte(payload)))
 			assert.Error(conn.Close()).IsNil()
 			wg.Done()
@@ -243,7 +243,7 @@ func TestShadowsocksChacha20TCP(t *testing.T) {
 			assert.Error(err).IsNil()
 			assert.Int(nBytes).Equals(len(payload))
 
-			response := readFrom(conn, time.Second*10, 10240*1024)
+			response := readFrom(conn, time.Second*20, 10240*1024)
 			assert.Bytes(response).Equals(xor([]byte(payload)))
 			assert.Error(conn.Close()).IsNil()
 			wg.Done()