diff --git a/tracetools_test/tracetools_test/utils.py b/tracetools_test/tracetools_test/utils.py
index ca17358..b144c75 100644
--- a/tracetools_test/tracetools_test/utils.py
+++ b/tracetools_test/tracetools_test/utils.py
@@ -26,6 +26,7 @@ from launch_ros.actions import Node
 from tracetools_launch.action import Trace
 from tracetools_read.utils import DictEvent
 from tracetools_read.utils import get_event_name
+from tracetools_trace.tools.path import append_timestamp
 
 
 def run_and_trace(
@@ -47,14 +48,14 @@ def run_and_trace(
     :param node_names: the names of the nodes to execute
     :return: exit code, full generated path
     """
-    session_name = session_name_prefix
+    session_name = append_timestamp(session_name_prefix)
     full_path = os.path.join(base_path, session_name)
 
     launch_actions = []
     # Add trace action
     launch_actions.append(Trace(
         session_name=session_name,
-        append_timestamp=True,
+        append_timestamp=False,
         base_path=base_path,
         events_ust=ros_events,
         events_kernel=kernel_events