diff --git a/quic/core/quic_connection_test.cc b/quic/core/quic_connection_test.cc
index e751f7b..d8d3013 100644
--- a/quic/core/quic_connection_test.cc
+++ b/quic/core/quic_connection_test.cc
@@ -10918,13 +10918,7 @@
                     .ack_frame->packets.Contains(QuicPacketNumber(2)));
   }));
   ProcessFramesPacketAtLevel(9, frames, ENCRYPTION_FORWARD_SECURE);
-  if (GetQuicReloadableFlag(quic_donot_change_queued_ack)) {
-    EXPECT_TRUE(writer_->ack_frames()[0].packets.Contains(QuicPacketNumber(2)));
-  } else {
-    // ACK frame changes mid packet serialiation!
-    EXPECT_FALSE(
-        writer_->ack_frames()[0].packets.Contains(QuicPacketNumber(2)));
-  }
+  EXPECT_TRUE(writer_->ack_frames()[0].packets.Contains(QuicPacketNumber(2)));
 }
 
 TEST_P(QuicConnectionTest, DonotExtendIdleTimeOnUndecryptablePackets) {