diff --git a/grc/gsm_block_tree.xml b/grc/gsm_block_tree.xml
index 2864e4d..94d1d82 100644
--- a/grc/gsm_block_tree.xml
+++ b/grc/gsm_block_tree.xml
@@ -42,8 +42,6 @@
       <block>gsm_bursts_printer</block>
       <block>gsm_burst_sink</block>
       <block>gsm_burst_source</block>
-      <block>gsm_burst_sink_qa</block>
-      <block>gsm_burst_source_qa</block>
       <block>gsm_extract_system_info</block>
       <block>gsm_extract_immediate_assignment</block>
       <block>gsm_controlled_rotator_cc</block>
@@ -51,8 +49,6 @@
       <block>gsm_message_printer</block>
       <block>gsm_clock_offset_corrector</block>
       <block>gsm_tmsi_dumper</block>
-      <block>gsm_message_source</block>
-      <block>gsm_message_sink</block>
     </cat>
   </cat>
 </cat>