diff --git a/test/network/feedback_generator.cc b/test/network/feedback_generator.cc
index 27b7690..d9386c8 100644
--- a/test/network/feedback_generator.cc
+++ b/test/network/feedback_generator.cc
@@ -39,6 +39,7 @@
   SentPacket sent;
   sent.send_time = Now();
   sent.size = DataSize::bytes(size);
+  sent.sequence_number = sequence_number_++;
   route_.SendRequest(size, sent);
 }
 
diff --git a/test/network/feedback_generator.h b/test/network/feedback_generator.h
index a2c4909..afc3068 100644
--- a/test/network/feedback_generator.h
+++ b/test/network/feedback_generator.h
@@ -52,6 +52,7 @@
 
   TransportPacketsFeedback builder_;
   std::vector<TransportPacketsFeedback> feedback_;
+  int64_t sequence_number_ = 1;
 };
 }  // namespace webrtc
 #endif  // TEST_NETWORK_FEEDBACK_GENERATOR_H_