diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 7fa1af6..46c9647 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -66,6 +66,7 @@
 friend module BTS_Tests_SMSCB;
 friend module BTS_Tests_virtphy;
 friend module BTS_Tests_LAPDm;
+friend module BTS_Tests_perf;
 
 /* The tests assume a BTS with the following timeslot configuration:
  * TS0 : Combined CCCH + SDCCH/4