diff --git a/firmware/apps/cardem/main.c b/firmware/apps/cardem/main.c
index a80c4986..21149019 100644
--- a/firmware/apps/cardem/main.c
+++ b/firmware/apps/cardem/main.c
@@ -108,6 +108,8 @@ static void check_exec_dbg_cmd(void)
 		return;
 
 	ch = UART_GetChar();
+	/* We must echo the character to make python fdexpect happy, whcih we use in factory testing */
+	fputc(ch, stdout);
 
 	board_exec_dbg_cmd(ch);
 }