diff --git a/tools/releasetools/test_utils.py b/tools/releasetools/test_utils.py
index b9c8dc7261..edb3d41d29 100644
--- a/tools/releasetools/test_utils.py
+++ b/tools/releasetools/test_utils.py
@@ -18,13 +18,18 @@
 Utils for running unittests.
 """
 
+import logging
 import os
 import os.path
 import struct
+import sys
 import unittest
 
 import common
 
+# Some test runner doesn't like outputs from stderr.
+logging.basicConfig(stream=sys.stdout)
+
 
 def get_testdata_dir():
   """Returns the testdata dir, in relative to the script dir."""