diff --git a/lib/modules/ws2p/ws2p/tests/connection_negociation.rs b/lib/modules/ws2p/ws2p/tests/connection_negociation.rs
index 88d9a79db878784ffc0b29c62a62b1287b691abe..06ceb61018a662a085a65b351eb98e972393c6b3 100644
--- a/lib/modules/ws2p/ws2p/tests/connection_negociation.rs
+++ b/lib/modules/ws2p/ws2p/tests/connection_negociation.rs
@@ -28,20 +28,12 @@ use durs_ws2p_protocol::controller::{WS2PControllerEvent, WebsocketActionOrder};
 use durs_ws2p_protocol::orchestrator::OrchestratorMsg;
 use durs_ws2p_protocol::MySelfWs2pNode;
 use std::sync::mpsc;
-use std::sync::Once;
 use std::thread;
 use std::time::Duration;
 
 static PORT: &'static u16 = &10899;
-static SETUP: Once = Once::new();
 static TIMEOUT_IN_MS: &'static u64 = &20_000;
 
-fn setup() {
-    SETUP.call_once(|| {
-        durs_common_tests_tools::logger::init_logger_stdout(vec!["ws"]);
-    });
-}
-
 pub fn currency() -> CurrencyName {
     CurrencyName(String::from("g1"))
 }
@@ -82,7 +74,7 @@ fn client_node() -> MySelfWs2pNode {
 #[test]
 #[cfg(unix)]
 fn test_connection_negociation_denial() {
-    setup();
+    durs_common_tests_tools::logger::init_logger_stdout(vec!["ws"]);
 
     // ===== initialization =====
     // client and server are initialized and launched in separate threads
@@ -159,7 +151,7 @@ fn test_connection_negociation_denial() {
 #[test]
 #[cfg(unix)]
 fn test_connection_negociation_success() {
-    setup();
+    durs_common_tests_tools::logger::init_logger_stdout(vec!["ws"]);
 
     // ===== initialization =====
     // client and server are initialized and launched in separate threads
diff --git a/lib/tests-tools/common-tests-tools/src/logger.rs b/lib/tests-tools/common-tests-tools/src/logger.rs
index 7eadbd24e633848b2c084119e4ba7042b790fc99..ced8980baa7c2822dc54c3cf5159a6a32ecabea1 100644
--- a/lib/tests-tools/common-tests-tools/src/logger.rs
+++ b/lib/tests-tools/common-tests-tools/src/logger.rs
@@ -17,9 +17,18 @@
 
 use fern::colors::{Color, ColoredLevelConfig};
 use log::LevelFilter;
+use std::sync::Once;
+
+static ONCE: Once = Once::new();
 
 /// Initialize stdout logger
 pub fn init_logger_stdout(off_targets: Vec<&'static str>) {
+    ONCE.call_once(|| {
+        init_logger_stdout_(off_targets);
+    });
+}
+
+fn init_logger_stdout_(off_targets: Vec<&'static str>) {
     let colors = match std::env::var("DURS_TESTS_LOG_COLOR")
         .unwrap_or_else(|_| String::from("no"))
         .as_str()