diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 6cc9732..5b1f7a1 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -292,6 +292,8 @@
 			f_init_vty();
 			f_vty_set_gpdu_txseq(use_gtpu_txseq);
 			f_vty_enable_echo_interval(g_use_echo_intval);
+			/* Emit a marker to appear in the SUT's own logging output */
+			f_logp(GGSNVTY, testcasename() & "() start");
 		} else if (m_ggsn_impl == GGSN_IMPL_OPEN5GS) {
 			f_init_diameter(testcasename());
 		}