diff --git a/srsue/src/test/ttcn3/src/ttcn3_ue.cc b/srsue/src/test/ttcn3/src/ttcn3_ue.cc
index 41325e6e9..568f9d98d 100644
--- a/srsue/src/test/ttcn3/src/ttcn3_ue.cc
+++ b/srsue/src/test/ttcn3/src/ttcn3_ue.cc
@@ -108,6 +108,7 @@ bool ttcn3_ue::switch_on()
 
 bool ttcn3_ue::switch_off()
 {
+  tft_matcher.reset(); // empty all TFTs
   return stack->switch_off();
 }