volume = get_self_volume()
     yardstick_tag = os.getenv("Yardstick_TAG")
     if yardstick_tag is None:
-        yardstick_tag = "danube3.1"
+        yardstick_tag = "danube.3.1"
     env_docker = client.containers.run(image="opnfv/yardstick:%s"
                                              % yardstick_tag,
                                        privileged=True,
 
 
     @classmethod
     def testcase_out_dir(cls, testcase):
-        suffix_name = os.getenv("SUFFIX_STRING")
-        if suffix_name is None:
+        file_name = os.getenv("OUTPUT_FILE")
+        if file_name is None:
             file_suffix = time.strftime('%H_%M', time.localtime(time.time()))
+            suffix_name = "_" + str(file_suffix)
+            out_name = cls.bottlenecks_config["log_dir"] + testcase
+            outfile_name = out_name + suffix_name + ".out"
         else:
-            file_suffix = suffix_name
-        suffix_name = str(suffix_name)
-        suffix_name = "_" + suffix_name
-        out_name = cls.bottlenecks_config["log_dir"] + testcase + file_suffix
-        outfile_name = out_name + ".out"
+            out_name = str(file_name)
+            outfile_name = cls.bottlenecks_config["log_dir"] + out_name
         return outfile_name
 
     @staticmethod