diff --git a/tests/msc_vlr/msc_vlr_test_authen_reuse.c b/tests/msc_vlr/msc_vlr_test_authen_reuse.c
index d73a5f8..62ea6c7 100644
--- a/tests/msc_vlr/msc_vlr_test_authen_reuse.c
+++ b/tests/msc_vlr/msc_vlr_test_authen_reuse.c
@@ -266,6 +266,8 @@
 static void test_auth_use_twice_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_auth_reuse(OSMO_RAT_GERAN_A, 1, 1, true);
 	comment_end();
 }
@@ -273,6 +275,8 @@
 static void test_auth_use_twice_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_auth_reuse(OSMO_RAT_UTRAN_IU, 1, 1, true);
 	comment_end();
 }
@@ -280,6 +284,8 @@
 static void test_auth_use_infinitely_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_auth_reuse(OSMO_RAT_GERAN_A, -1, 3, false);
 	comment_end();
 }
@@ -287,6 +293,8 @@
 static void test_auth_use_infinitely_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_auth_reuse(OSMO_RAT_UTRAN_IU, -1, 3, false);
 	comment_end();
 }
@@ -294,6 +302,8 @@
 static void test_no_auth_reuse_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_auth_reuse(OSMO_RAT_GERAN_A, 0, 0, true);
 	comment_end();
 }
@@ -301,6 +311,8 @@
 static void test_no_auth_reuse_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_auth_reuse(OSMO_RAT_UTRAN_IU, 0, 0, true);
 	comment_end();
 }
diff --git a/tests/msc_vlr/msc_vlr_test_call.c b/tests/msc_vlr/msc_vlr_test_call.c
index 065af25..cec2f8d 100644
--- a/tests/msc_vlr/msc_vlr_test_call.c
+++ b/tests/msc_vlr/msc_vlr_test_call.c
@@ -46,6 +46,7 @@
 	struct vlr_subscr *vsub;
 
 	net->authentication_required = true;
+	net->a5_encryption_mask = A5_0_3;
 	net->vlr->cfg.assign_tmsi = true;
 	rx_from_ran = OSMO_RAT_UTRAN_IU;
 
diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.c b/tests/msc_vlr/msc_vlr_test_umts_authen.c
index a89b0d1..6f8fa01 100644
--- a/tests/msc_vlr/msc_vlr_test_umts_authen.c
+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.c
@@ -306,6 +306,8 @@
 static void test_umts_authen_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_umts_authen(OSMO_RAT_GERAN_A);
 	comment_end();
 }
@@ -313,6 +315,8 @@
 static void test_umts_authen_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_umts_authen(OSMO_RAT_UTRAN_IU);
 	comment_end();
 }
@@ -544,6 +548,8 @@
 static void test_umts_authen_resync_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_umts_authen_resync(OSMO_RAT_GERAN_A);
 	comment_end();
 }
@@ -551,6 +557,8 @@
 static void test_umts_authen_resync_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_umts_authen_resync(OSMO_RAT_UTRAN_IU);
 	comment_end();
 }
@@ -644,6 +652,8 @@
 static void test_umts_authen_too_short_res_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_umts_authen_too_short_res(OSMO_RAT_GERAN_A);
 	comment_end();
 }
@@ -651,6 +661,8 @@
 static void test_umts_authen_too_short_res_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_umts_authen_too_short_res(OSMO_RAT_UTRAN_IU);
 	comment_end();
 }
@@ -744,6 +756,8 @@
 static void test_umts_authen_too_long_res_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_umts_authen_too_long_res(OSMO_RAT_GERAN_A);
 	comment_end();
 }
@@ -751,6 +765,8 @@
 static void test_umts_authen_too_long_res_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_umts_authen_too_long_res(OSMO_RAT_UTRAN_IU);
 	comment_end();
 }
@@ -849,6 +865,8 @@
 static void test_umts_authen_only_sres_geran()
 {
 	comment_start();
+	/* A5/0 = no encryption */
+	net->a5_encryption_mask = A5_0;
 	_test_umts_authen_only_sres(OSMO_RAT_GERAN_A);
 	comment_end();
 }
@@ -856,6 +874,8 @@
 static void test_umts_authen_only_sres_utran()
 {
 	comment_start();
+	/* A5/0 + A5/3 = encryption enabled; so far the A5 setting also triggers UTRAN encryption */
+	net->a5_encryption_mask = A5_0_3;
 	_test_umts_authen_only_sres(OSMO_RAT_UTRAN_IU);
 	comment_end();
 }
diff --git a/tests/msc_vlr/msc_vlr_tests.h b/tests/msc_vlr/msc_vlr_tests.h
index 9df9cf0..4330ea8 100644
--- a/tests/msc_vlr/msc_vlr_tests.h
+++ b/tests/msc_vlr/msc_vlr_tests.h
@@ -32,6 +32,9 @@
 #include <osmocom/msc/msc_a.h>
 #include <osmocom/msc/mncc.h>
 
+#define A5_0 (1 << 0)
+#define A5_0_3 ((1 << 0) | (1 << 3))
+
 extern bool _log_lines;
 #define _log(fmt, args...) do { \
 		if (_log_lines) \