diff --git a/tests/msc_vlr/msc_vlr_tests.c b/tests/msc_vlr/msc_vlr_tests.c
index 28201d0..2049e9f 100644
--- a/tests/msc_vlr/msc_vlr_tests.c
+++ b/tests/msc_vlr/msc_vlr_tests.c
@@ -242,8 +242,8 @@
 void __real_gsm340_gen_scts(uint8_t *scts, time_t time);
 void __wrap_gsm340_gen_scts(uint8_t *scts, time_t time)
 {
-	/* Remove the time to encode for deterministic test results */
-	__real_gsm340_gen_scts(scts, 0);
+	/* Write fixed time bytes for deterministic test results */
+	osmo_hexparse("07101000000000", scts, 7);
 }
 
 const char *paging_expecting_imsi = NULL;