diff --git a/test/pts/le_data_channel.c b/test/pts/le_data_channel.c
index aff9d68ab..b53e38e34 100644
--- a/test/pts/le_data_channel.c
+++ b/test/pts/le_data_channel.c
@@ -90,7 +90,8 @@ const char * data_classic = "ABCDEF";
 static int todo_send_short;
 static int todo_send_long;
 
-static uint8_t buffer_x[1000];
+// note: must be smaller than TSPX_tester_mtu for l2cap/le/cfc/bv-02-c to succeed
+static uint8_t buffer_x[500];
 
 static uint16_t cid_le;
 static uint16_t cid_classic;
@@ -321,7 +322,7 @@ static void stdin_process(char buffer){
                                     sizeof(buffer_x), L2CAP_LE_AUTOMATIC_CREDITS, LEVEL_0, &cid_le);
             break;
 
-        case 'A':
+        case 'B':
             printf("Creating connection to %s 0x%02x - LE\n", bd_addr_to_str(pts_address), TSPX_psm_unsupported);
             l2cap_le_create_channel(&app_packet_handler, handle_le, TSPX_psm_unsupported, buffer_x, 
                                     sizeof(buffer_x), L2CAP_LE_AUTOMATIC_CREDITS, LEVEL_0, &cid_le);
@@ -418,4 +419,4 @@ int btstack_main(int argc, const char * argv[]){
     return 0;
 }
 
-/* EXAMPLE_END */
\ No newline at end of file
+/* EXAMPLE_END */