diff --git a/tuf/tests/test_keystore.py b/tuf/tests/test_keystore.py
index 196bb7d4..816f400a 100755
--- a/tuf/tests/test_keystore.py
+++ b/tuf/tests/test_keystore.py
@@ -19,12 +19,19 @@
 import unittest
 import shutil
 import os
+import logging
 
 import tuf.repo.keystore
 import tuf.rsa_key
 import tuf.formats
 import tuf.util
 
+logger = logging.getLogger('tuf')
+
+# Disable all logging calls of level CRITICAL and below.
+# Comment the line below to enable logging.
+logging.disable(logging.CRITICAL)
+
 # We'll need json module for testing '_encrypt()' and '_decrypt()'
 # internal function.
 json = tuf.util.import_json()
diff --git a/tuf/tests/test_push.py b/tuf/tests/test_push.py
old mode 100644
new mode 100755
diff --git a/tuf/tests/test_pushtoolslib.py b/tuf/tests/test_pushtoolslib.py
old mode 100644
new mode 100755