diff --git a/libnfc/buses/uart_posix.c b/libnfc/buses/uart_posix.c
index 7b687c1..ced1bc6 100644
--- a/libnfc/buses/uart_posix.c
+++ b/libnfc/buses/uart_posix.c
@@ -127,7 +127,7 @@ uart_flush_input(serial_port sp)
   }
   char *rx = malloc(available_bytes_count);
   // There is something available, read the data
-  res = read(UART_DATA(sp)->fd, rx, available_bytes_count);
+  read(UART_DATA(sp)->fd, rx, available_bytes_count);
   log_put(LOG_GROUP, LOG_CATEGORY, NFC_LOG_PRIORITY_DEBUG, "%d bytes have eatten.", available_bytes_count);
   free(rx);
 }
diff --git a/test/test_dep_passive.c b/test/test_dep_passive.c
index 6f093e9..71d7e3a 100644
--- a/test/test_dep_passive.c
+++ b/test/test_dep_passive.c
@@ -105,7 +105,6 @@ target_thread(void *arg)
   // Second pass
   res = nfc_target_receive_bytes(device, abtRx, sizeof(abtRx), 500);
   cut_assert_operator_int(res, > , 0, cut_message("Can't receive bytes from initiator: %s", nfc_strerror(device)));
-  szRx = (size_t) res;
 
   cut_assert_equal_memory(abtAttRx, sizeof(abtAttRx), abtRx, res, cut_message("Invalid received data"));
   if (res <= 0) { thread_res = -1; return (void *) thread_res; }
@@ -117,7 +116,6 @@ target_thread(void *arg)
   // Third pass
   res = nfc_target_receive_bytes(device, abtRx, sizeof(abtRx), 500);
   cut_assert_operator_int(res, > , 0, cut_message("Can't receive bytes from initiator: %s", nfc_strerror(device)));
-  szRx = (size_t) res;
 
   cut_assert_equal_memory(abtAttRx, sizeof(abtAttRx), abtRx, res, cut_message("Invalid received data"));
   if (res <= 0) { thread_res = -1; return (void *) thread_res; }
@@ -129,7 +127,6 @@ target_thread(void *arg)
   // Fourth pass
   res =  nfc_target_receive_bytes(device, abtRx, sizeof(abtRx), 500);
   cut_assert_operator_int(res, > , 0, cut_message("Can't receive bytes from initiator: %s", nfc_strerror(device)));
-  szRx = (size_t) res;
 
   cut_assert_equal_memory(abtAttRx, sizeof(abtAttRx), abtRx, res, cut_message("Invalid received data"));
   if (res <= 0) { thread_res = -1; return (void *) thread_res; }