diff --git a/tester/liblinphone_tester.h b/tester/liblinphone_tester.h
index f841d2457..c35db9917 100644
--- a/tester/liblinphone_tester.h
+++ b/tester/liblinphone_tester.h
@@ -334,6 +334,7 @@ void dtmf_received(LinphoneCore *lc, LinphoneCall *call, int dtmf);
 void call_stats_updated(LinphoneCore *lc, LinphoneCall *call, const LinphoneCallStats *stats);
 
 LinphoneAddress * create_linphone_address(const char * domain);
+LinphoneAddress * create_linphone_address_with_username(const char * domain, const char * username);
 bool_t wait_for(LinphoneCore* lc_1, LinphoneCore* lc_2,int* counter,int value);
 bool_t wait_for_list(MSList* lcs,int* counter,int value,int timeout_ms);
 bool_t wait_for_until(LinphoneCore* lc_1, LinphoneCore* lc_2,int* counter,int value,int timout_ms);
diff --git a/tester/tester.c b/tester/tester.c
index cf6b9e42e..bcbd5731e 100644
--- a/tester/tester.c
+++ b/tester/tester.c
@@ -91,10 +91,17 @@ bool_t liblinphone_tester_clock_elapsed(const MSTimeSpec *start, int value_ms){
 
 
 LinphoneAddress * create_linphone_address(const char * domain) {
+	return create_linphone_address_with_username(domain,NULL);
+}
+
+LinphoneAddress * create_linphone_address_with_username(const char * domain, const char* username) {
 	LinphoneAddress *addr = linphone_address_new(NULL);
 	if (!BC_ASSERT_PTR_NOT_NULL(addr)) return NULL;
-	linphone_address_set_username(addr,test_username);
-	BC_ASSERT_STRING_EQUAL(test_username,linphone_address_get_username(addr));
+	/* For test purpose, we might use different username */
+	if(username) linphone_address_set_username(addr,username);
+	else linphone_address_set_username(addr,test_username);
+	if(username) BC_ASSERT_STRING_EQUAL(username,linphone_address_get_username(addr));
+	else BC_ASSERT_STRING_EQUAL(test_username,linphone_address_get_username(addr));
 	if (!domain) domain= test_route;
 	linphone_address_set_domain(addr,domain);
 	BC_ASSERT_STRING_EQUAL(domain,linphone_address_get_domain(addr));