diff --git a/tester/liblinphone_tester.h b/tester/liblinphone_tester.h
index 5e5767bab..152dd6dd3 100644
--- a/tester/liblinphone_tester.h
+++ b/tester/liblinphone_tester.h
@@ -1,11 +1,11 @@
 /*
-    liblinphone_tester - liblinphone test suite
-    Copyright (C) 2013  Belledonne Communications SARL
+	liblinphone_tester - liblinphone test suite
+	Copyright (C) 2013  Belledonne Communications SARL
 
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 2 of the License, or
-    (at your option) any later version.
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
 
 	This program is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -67,6 +67,7 @@ extern int liblinphone_tester_test_index(const char *suite_name, const char *tes
 extern void liblinphone_tester_init(void);
 extern void liblinphone_tester_uninit(void);
 extern int liblinphone_tester_run_tests(const char *suite_name, const char *test_name);
+extern void liblinphone_tester_set_fileprefix(const char* file_prefix);
 
 #ifdef __cplusplus
 };
@@ -177,7 +178,7 @@ typedef struct _stats {
 	int number_of_LinphonePublishExpiring;
 	int number_of_LinphonePublishError;
 	int number_of_LinphonePublishCleared;
-	
+
 	int number_of_LinphoneConfiguringSkipped;
 	int number_of_LinphoneConfiguringFailed;
 	int number_of_LinphoneConfiguringSuccessful;
@@ -230,7 +231,7 @@ const char *liblinphone_tester_get_notify_content(void);
 void liblinphone_tester_chat_message_state_change(LinphoneChatMessage* msg,LinphoneChatMessageState state,void* ud);
 void liblinphone_tester_check_rtcp(LinphoneCoreManager* caller, LinphoneCoreManager* callee);
 void liblinphone_tester_clock_start(MSTimeSpec *start);
-bool_t liblinphone_tester_clock_elapsed(const MSTimeSpec *start, int value_ms); 
+bool_t liblinphone_tester_clock_elapsed(const MSTimeSpec *start, int value_ms);
 
 #endif /* LIBLINPHONE_TESTER_H_ */
 
diff --git a/tester/tester.c b/tester/tester.c
index 3623073e4..3e09be635 100644
--- a/tester/tester.c
+++ b/tester/tester.c
@@ -80,8 +80,8 @@ LinphoneAddress * create_linphone_address(const char * domain) {
 static void auth_info_requested(LinphoneCore *lc, const char *realm, const char *username, const char *domain) {
 	stats* counters;
 	ms_message("Auth info requested  for user id [%s] at realm [%s]\n"
-               ,username
-               ,realm);
+			   ,username
+			   ,realm);
 	counters = get_stats(lc);
 	counters->number_of_auth_info_requested++;
 }
@@ -147,7 +147,7 @@ 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) {
 	MSList* iterator;
 	MSTimeSpec start;
-	
+
 	liblinphone_tester_clock_start(&start);
 	while ((counter==NULL || *counter<value) && !liblinphone_tester_clock_elapsed(&start,timeout_ms)) {
 		for (iterator=lcs;iterator!=NULL;iterator=iterator->next) {
@@ -164,7 +164,7 @@ static void set_codec_enable(LinphoneCore* lc,const char* type,int rate,bool_t e
 	MSList* codecs_it;
 	PayloadType* pt;
 	for (codecs_it=codecs;codecs_it!=NULL;codecs_it=codecs_it->next) {
-        linphone_core_enable_payload_type(lc,(PayloadType*)codecs_it->data,0);
+		linphone_core_enable_payload_type(lc,(PayloadType*)codecs_it->data,0);
 	}
 	if((pt = linphone_core_find_payload_type(lc,type,rate,1))) {
 		linphone_core_enable_payload_type(lc,pt, enable);
@@ -322,6 +322,11 @@ const char * liblinphone_tester_test_name(const char *suite_name, int test_index
 	return test_suite[suite_index]->tests[test_index].name;
 }
 
+void liblinphone_tester_set_fileprefix(const char* file_prefix){
+	liblinphone_tester_file_prefix = file_prefix;
+}
+
+
 void liblinphone_tester_init(void) {
 	add_test_suite(&setup_test_suite);
 	add_test_suite(&register_test_suite);