diff --git a/scripts/evaluation/prepare-config.py b/scripts/evaluation/prepare-config.py
index 9bfb33f2..11277060 100755
--- a/scripts/evaluation/prepare-config.py
+++ b/scripts/evaluation/prepare-config.py
@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 
 import boto3
+from datetime import datetime
 import sys
 import os 
 import time
@@ -11,6 +12,8 @@
 def str2bool(v):
   return v.lower() in ("yes", "true", "t", "1")
 
+eval_time = datetime.now().strftime('%Y%m%d%H%M%S')
+
 config = {}
 config['CAR_COLOR'] = []
 config['BODY_SHELL_TYPE'] = []
@@ -35,15 +38,17 @@ def str2bool(v):
 config['MODEL_S3_PREFIX'].append(os.environ.get('DR_LOCAL_S3_MODEL_PREFIX', 'rl-deepracer-sagemaker'))
 config['MODEL_S3_BUCKET'].append(os.environ.get('DR_LOCAL_S3_BUCKET', 'bucket'))
 config['SIMTRACE_S3_BUCKET'].append(os.environ.get('DR_LOCAL_S3_BUCKET', 'bucket'))
-config['SIMTRACE_S3_PREFIX'].append(os.environ.get('DR_LOCAL_S3_MODEL_PREFIX', 'rl-deepracer-sagemaker'))
+config['SIMTRACE_S3_PREFIX'].append(
+    '{}/evaluation-{}'.format(os.environ.get('DR_LOCAL_S3_MODEL_PREFIX', 'rl-deepracer-sagemaker'), eval_time)
+)
 
 # Metrics
 config['METRICS_S3_BUCKET'].append(os.environ.get('DR_LOCAL_S3_BUCKET', 'bucket'))
 metrics_prefix = os.environ.get('DR_LOCAL_S3_METRICS_PREFIX', None)
 if metrics_prefix is not None:
-    config['METRICS_S3_OBJECT_KEY'].append('{}/EvaluationMetrics-{}.json'.format(metrics_prefix, str(round(time.time()))))
+    config['METRICS_S3_OBJECT_KEY'].append('{}/EvaluationMetrics-{}.json'.format(metrics_prefix, eval_time))
 else:
-    config['METRICS_S3_OBJECT_KEY'].append('DeepRacer-Metrics/EvaluationMetrics-{}.json'.format(str(round(time.time()))))
+    config['METRICS_S3_OBJECT_KEY'].append('DeepRacer-Metrics/EvaluationMetrics-{}.json'.format(eval_time))
     
 # MP4 configuration / sav
 save_mp4 = str2bool(os.environ.get("DR_EVAL_SAVE_MP4", "False"))