diff --git a/libuavcan/test/transport/transfer_sender.cpp b/libuavcan/test/transport/transfer_sender.cpp
index f1cbd55df4..36a40b6b2b 100644
--- a/libuavcan/test/transport/transfer_sender.cpp
+++ b/libuavcan/test/transport/transfer_sender.cpp
@@ -103,6 +103,11 @@ TEST(TransferSender, Basic)
         Transfer(TX_DEADLINE, 0, 15, TransferTypeServiceResponse,  2, TX_NODE_ID, RX_NODE_ID, "",      TYPES[1])
     };
 
+    /*
+     * Making sure that the abort flag is not used.
+     */
+    ASSERT_EQ(0, driver.ifaces.at(0).tx.front().flags);
+
     /*
      * Receiving on the other side.
      */