diff --git a/internal/quic/conn_streams_test.go b/internal/quic/conn_streams_test.go
index fb9af47..6815e40 100644
--- a/internal/quic/conn_streams_test.go
+++ b/internal/quic/conn_streams_test.go
@@ -510,6 +510,10 @@
 					return
 				}
 				s.Flush()
+				_, err = io.ReadAll(s)
+				if err != nil {
+					t.Errorf("ReadFull: %v", err)
+				}
 				s.Close()
 			}
 		}()