diff --git a/setup.py b/setup.py
index 4175561b..bbbc3c85 100755
--- a/setup.py
+++ b/setup.py
@@ -76,7 +76,8 @@
     'tuf.pushtools',
     'tuf.pushtools.transfer',
     'tuf.repo',
-    'tuf.tests'
+    'tuf.tests',
+    'tuf.tests.system_tests'
   ],
   scripts=[
     'tuf/repo/quickstart.py',
diff --git a/tuf/client/basic_client.py b/tuf/client/basic_client.py
index b690955c..1ba36dbc 100755
--- a/tuf/client/basic_client.py
+++ b/tuf/client/basic_client.py
@@ -55,6 +55,8 @@
 import optparse
 import logging
 
+import tuf
+import tuf.formats
 import tuf.client.updater
 import tuf.log
 
diff --git a/tuf/client/updater.py b/tuf/client/updater.py
index 54796c28..2f9ca1a1 100755
--- a/tuf/client/updater.py
+++ b/tuf/client/updater.py
@@ -106,6 +106,7 @@
 import shutil
 import time
 
+import tuf
 import tuf.conf
 import tuf.download
 import tuf.formats
@@ -118,7 +119,7 @@
 import tuf.sig
 import tuf.util
 
-logger = logging.getLogger('tuf')
+logger = logging.getLogger('tuf.client.updater')
 
 
 class Updater(object):
diff --git a/tuf/examples/example_client.py b/tuf/examples/example_client.py
index 78b1103f..a1735412 100755
--- a/tuf/examples/example_client.py
+++ b/tuf/examples/example_client.py
@@ -27,10 +27,12 @@
 
 import logging
 
+import tuf
+import tuf.log
 import tuf.client.updater
 
-# Uncomment the line below to enable printing of debugging information.
-#tuf.log.set_log_level(logging.DEBUG)
+logger = logging.getLogger('tuf.cient.basic_client')
+
 
 # Set the local repository directory containing the metadata files.
 tuf.conf.repository_directory = '.'
diff --git a/tuf/hash.py b/tuf/hash.py
index 9421ce35..161a181c 100755
--- a/tuf/hash.py
+++ b/tuf/hash.py
@@ -24,12 +24,13 @@
 """
 
 
+import logging
+
 # Import tuf Exceptions.
 import tuf
 import tuf.log
 
 # Import tuf logger to log warning messages.
-import logging
 logger = logging.getLogger('tuf.hash')
 
 # The list of hash libraries imported successfully.
diff --git a/tuf/keydb.py b/tuf/keydb.py
index e2ee142d..601993b3 100755
--- a/tuf/keydb.py
+++ b/tuf/keydb.py
@@ -31,6 +31,7 @@
 
 import logging
 
+import tuf
 import tuf.formats
 import tuf.rsa_key
 
diff --git a/tuf/log.py b/tuf/log.py
index 716cf379..51397d1f 100755
--- a/tuf/log.py
+++ b/tuf/log.py
@@ -89,7 +89,7 @@
 # may be modified with 'set_filehandler_log_level()'.  '_DEFAULT_LOG_FILENAME'
 # will be opened in append mode.
 file_handler = logging.FileHandler(_DEFAULT_LOG_FILENAME)
-file_handler.setLevel(_DEFAULT_LOG_LEVEL)
+file_handler.setLevel(_DEFAULT_FILE_LOG_LEVEL)
 file_handler.setFormatter(formatter)
 
 # Set the logger and its settings.
diff --git a/tuf/mirrors.py b/tuf/mirrors.py
index 5d159021..6a375467 100755
--- a/tuf/mirrors.py
+++ b/tuf/mirrors.py
@@ -21,6 +21,7 @@
 import os
 import urllib
 
+import tuf
 import tuf.util
 import tuf.formats
 
diff --git a/tuf/pushtools/push.py b/tuf/pushtools/push.py
index dc100659..17a3b19c 100755
--- a/tuf/pushtools/push.py
+++ b/tuf/pushtools/push.py
@@ -59,6 +59,7 @@
 import sys
 import optparse
 
+import tuf
 import tuf.formats
 import tuf.pushtools.pushtoolslib
 import tuf.pushtools.transfer.scp
diff --git a/tuf/pushtools/pushtoolslib.py b/tuf/pushtools/pushtoolslib.py
index ce6ae292..995a2ab2 100755
--- a/tuf/pushtools/pushtoolslib.py
+++ b/tuf/pushtools/pushtoolslib.py
@@ -151,4 +151,4 @@ def read_config_file(filename, config_type):
     message = 'Invalid "config_type" argument.  Supported: '+repr(CONFIG_TYPES)
     raise tuf.Error(message)
 
-  return config_dict
\ No newline at end of file
+  return config_dict
diff --git a/tuf/pushtools/receivetools/receive.py b/tuf/pushtools/receivetools/receive.py
index 7734a456..9fe81121 100755
--- a/tuf/pushtools/receivetools/receive.py
+++ b/tuf/pushtools/receivetools/receive.py
@@ -155,6 +155,7 @@
 import logging
 import optparse
 
+import tuf
 import tuf.formats
 import tuf.keydb
 import tuf.roledb
@@ -165,7 +166,7 @@
 import tuf.pushtools.pushtoolslib
 
 # See 'log.py' to learn how logging is handled in TUF.
-logger = logging.getLogger('tuf.receive')
+logger = logging.getLogger('tuf.pushtools.receivetools.receive')
 
 
 def receive(config_filepath):
@@ -257,7 +258,7 @@ def receive(config_filepath):
   
   for directory_name, path in directories_to_check.items():
     if not os.path.exists(path):
-      message = directory_name+' directory does not exist: '+str(path)
+      message = directory_name+' directory does not exist: '+repr(path)
       logger.error(message)
       raise tuf.Error(message)
   
@@ -270,13 +271,13 @@ def receive(config_filepath):
   # Process all the pushes for each of the pushroots.
   for pushroot in pushroots:
     if not os.path.exists(pushroot):
-      logger.error('The pushroot '+str(pushroot)+' does not exist. Skipping.')
+      logger.error('The pushroot '+repr(pushroot)+' does not exist. Skipping.')
       continue
    
     # Add the 'processed' and 'processing' directories if not present.
     # These directories must exist so that we can properly process
     # a push.
-    logger.debug('Looking for pushes in pushroot '+str(pushroot))
+    logger.debug('Looking for pushes in pushroot '+repr(pushroot))
     if not os.path.exists(os.path.join(pushroot, 'processed')):
       os.mkdir(os.path.join(pushroot, 'processed'))
     if not os.path.exists(os.path.join(pushroot, 'processing')):
@@ -297,7 +298,7 @@ def receive(config_filepath):
         # Ensure the 'info' file exists.  A successful push operation creates
         # and saves this 'info' file to the push directory.
         if not os.path.exists(os.path.join(pushpath, 'info')):
-          message = 'Skipping incomplete push '+str(pushpath)+' (no info file).'
+          message = 'Skipping incomplete push '+repr(pushpath)+' (no info file).'
           logger.warn(message)
           continue
         
@@ -313,7 +314,7 @@ def receive(config_filepath):
    
     # Done.  Log the result of processing the pushes for 'pushroot'.
     message = 'Completed processing of all pushes.  Push successes = '+\
-               str(success_count)+', failures = '+str(failure_count)+'.'
+               repr(success_count)+', failures = '+repr(failure_count)+'.'
     logger.info(message)
 
 
@@ -364,11 +365,11 @@ def _process_new_push(pushroot, pushname, metadata_directory,
   
   """
     
-  logger.info('Processing '+str(pushroot)+'/'+str(pushname))
+  logger.info('Processing '+repr(pushroot)+'/'+repr(pushname))
 
   # Move the pushed directory to the 'processing' directory.
   pushpath = os.path.join(pushroot, 'processing', pushname)
-  logger.debug('Moving push directory to '+str(pushpath))
+  logger.debug('Moving push directory to '+repr(pushpath))
   if os.path.isdir(pushpath) or os.path.isfile(pushpath):
     os.remove(pushpath)
   os.rename(os.path.join(pushroot, pushname), pushpath)
@@ -418,14 +419,14 @@ def _process_new_push(pushroot, pushname, metadata_directory,
       finally:
         file_object.close()
       
-      message = 'Could not process: '+str(pushroot)+'/'+str(pushname)
+      message = 'Could not process: '+repr(pushroot)+'/'+repr(pushname)
       logger.exception(message)
       return False
   
   # On success or failure, move 'pushpath' to the processed directory.
   finally:
     processedpath = os.path.join(pushroot, 'processed', pushname)
-    logger.debug('Moving push directory to '+str(processedpath))
+    logger.debug('Moving push directory to '+repr(processedpath))
     if os.path.isdir(processedpath) or os.path.isfile(processedpath):
       os.remove(processedpath)
     os.rename(pushpath, processedpath)
@@ -575,17 +576,17 @@ def _process_copied_push(pushpath, metadata_directory,
 
     # Allowing equality makes testing/development easier.
     if formatted_timestamp > new_formatted_timestamp:
-      message = 'Existing metadata timestamp '+str(timestamp)+' is newer '+\
-      'than the new metadata\'s timestamp '+str(new_timestamp)
+      message = 'Existing metadata timestamp '+repr(timestamp)+' is newer '+\
+      'than the new metadata\'s timestamp '+repr(new_timestamp)
       raise tuf.Error(message)
     else:
-      message = 'New metadata timestamp is '+str(new_timestamp)+'. '+\
-        ' Replacing old metadata with timestamp '+str(timestamp)
+      message = 'New metadata timestamp is '+repr(new_timestamp)+'. '+\
+        ' Replacing old metadata with timestamp '+repr(timestamp)
       logger.debug(message)
 
   # There appears to be no 'targets.txt' metadata file on the repository.
   else:
-    message = 'The old targets metadata file '+str(targets_metadatapath)+'. '+\
+    message = 'The old targets metadata file '+repr(targets_metadatapath)+'. '+\
       'doesn\'t exist in the repo. Skipping the timestamp check.'
     logger.warn(message)
 
@@ -594,10 +595,10 @@ def _process_copied_push(pushpath, metadata_directory,
   formatted_expiration = tuf.formats.parse_time(expiration)
   
   if formatted_expiration <= time.time():
-    message = 'Pushed metadata expired at '+str(expiration)
+    message = 'Pushed metadata expired at '+repr(expiration)
     raise tuf.Error(message)
   else:
-    message = 'Metadata will expire at '+str(expiration)
+    message = 'Metadata will expire at '+repr(expiration)
     logger.debug(message)
 
   # Verify the signatures of the new targets metadata.
@@ -608,11 +609,11 @@ def _process_copied_push(pushpath, metadata_directory,
   # Log the status of the signatures.  For example, the number of good,
   # bad, untrusted, unknown, signatures. 
   status = tuf.sig.get_signature_status(new_targets_signable, 'targets')
-  logger.debug(str(status))
+  logger.debug(repr(status))
 
   # Log the number of targets specified in the new targets metadata file.
   targets_count = len(new_targets_signable['signed']['targets'].keys())
-  message = 'Number of targets specified: '+str(targets_count)
+  message = 'Number of targets specified: '+repr(targets_count)
   logger.info(message)
 
   # Verify the files of the new targets metadata file.
@@ -625,39 +626,39 @@ def _process_copied_push(pushpath, metadata_directory,
     # Check that the target was provided.
     if not os.path.exists(targetpath):
       message = 'The specified target file was not provided: '+\
-        str(target_relativepath)
+        repr(target_relativepath)
       raise tuf.Error(message)
 
     # Check the target's size.  A valid size is required of target files.
     target_size = os.path.getsize(targetpath)
     if target_size != target_info['length']:
-      message = 'The size of target file '+str(target_relativepath)+\
-        ' is incorrect: was '+str(target_size)+', expected '+\
-        str(target_info['length'])
+      message = 'The size of target file '+repr(target_relativepath)+\
+        ' is incorrect: was '+repr(target_size)+', expected '+\
+        repr(target_info['length'])
       raise tuf.Error(message)
     else:
-      message = 'Size of target '+str(targetpath)+' is correct '+\
-        '('+str(target_size)+' bytes).'
+      message = 'Size of target '+repr(targetpath)+' is correct '+\
+        '('+repr(target_size)+' bytes).'
       logger.debug(message)
 
     # Check hashes.  Valid target files is required.
     hash_count = len(target_info['hashes'].items())
     if hash_count == 0:
-      message = str(targetpath)+' contains an empty hashes dictionary.'
+      message = repr(targetpath)+' contains an empty hashes dictionary.'
       raise tuf.Error(message)
     else:
-      logger.debug(str(hash_count)+' hash(es) to check.')
+      logger.debug(repr(hash_count)+' hash(es) to check.')
     
     for algorithm, digest in target_info['hashes'].items():
       digest_object = tuf.hash.digest_filename(targetpath, algorithm=algorithm)
       if digest_object.hexdigest() != digest:
-        message = str(algorithm)+' hash does not match: '+\
-          ' was '+str(digest_object.hexdigest())+', expected '+\
-          str(digest)
+        message = repr(algorithm)+' hash does not match: '+\
+          ' was '+repr(digest_object.hexdigest())+', expected '+\
+          repr(digest)
         raise tuf.Error(message)
       else:
-        message = str(algorithm)+' hash of target '+str(targetpath)+\
-          ' is correct ('+str(digest)+').'
+        message = repr(algorithm)+' hash of target '+repr(targetpath)+\
+          ' is correct ('+repr(digest)+').'
         logger.debug(message)
 
   # At this point, the targets metadata and all specified files have been
@@ -673,14 +674,14 @@ def _process_copied_push(pushpath, metadata_directory,
     source_path = os.path.join(push_temporary_directory, targets_basename,
                                target_relativepath)
     destination_path = os.path.join(targets_directory, target_relativepath)
-    logger.info('Adding target to repository: '+str(destination_path))
+    logger.info('Adding target to repository: '+repr(destination_path))
     destination_directory = os.path.dirname(destination_path)
     if not os.path.exists(destination_directory):
       os.mkdir(destination_directory)
     shutil.copy(source_path, destination_path)
 
   # Copy the new targets metadata file into place on the repository.
-  message = 'Adding new targets metadata to repository: '+str(targets_metadatapath)
+  message = 'Adding new targets metadata to repository: '+repr(targets_metadatapath)
   logger.info(message)
   shutil.copy(new_targets_metadatapath, targets_metadatapath)
 
@@ -745,7 +746,7 @@ def _remove_old_files(targets_metadatapath, pushname,
   for target_relativepath in targets_signable['signed']['targets'].keys():
     targetpath = os.path.join(targets_directory, target_relativepath)
     backup_targetpath = os.path.join(backup_targetsdirectory, target_relativepath)
-    message = 'Backing up target '+str(targetpath)+' to '+str(backup_targetpath)
+    message = 'Backing up target '+repr(targetpath)+' to '+repr(backup_targetpath)
     logger.info(message)
    
     # Move the old target file to the backup directory.  Create any
@@ -760,13 +761,13 @@ def _remove_old_files(targets_metadatapath, pushname,
           raise tuf.Error(str(e))
       os.rename(targetpath, backup_targetpath)
     else:
-      message = 'The old target '+str(targetpath)+' doesn\'t exist in the repo.'
+      message = 'The old target '+repr(targetpath)+' doesn\'t exist in the repo.'
       logger.warn(message)
 
   # Backup the old 'targets.txt' metadata file.
   backup_targets_metadatafile = os.path.join(backup_destdirectory, 'targets.txt')
-  message = 'Backing up old metadata '+str(targets_metadatapath)+\
-    ' to '+str(backup_targets_metadatafile)
+  message = 'Backing up old metadata '+repr(targets_metadatapath)+\
+    ' to '+repr(backup_targets_metadatafile)
   logger.info(message)
   if os.path.isfile(backup_targets_metadatafile):
     os.remove(backup_targets_metadatafile)
diff --git a/tuf/pushtools/transfer/scp.py b/tuf/pushtools/transfer/scp.py
index c844f4e9..d4aa7b0d 100755
--- a/tuf/pushtools/transfer/scp.py
+++ b/tuf/pushtools/transfer/scp.py
@@ -54,6 +54,7 @@
 import tempfile
 import time
 
+import tuf
 import tuf.formats
 
 
diff --git a/tuf/repo/quickstart.py b/tuf/repo/quickstart.py
index ff67890d..e51373da 100755
--- a/tuf/repo/quickstart.py
+++ b/tuf/repo/quickstart.py
@@ -102,7 +102,7 @@
 import tuf.log
 
 # See 'log.py' to learn how logging is handled in TUF.
-logger = logging.getLogger('tuf')
+logger = logging.getLogger('tuf.quickstart')
 
 # Set the default file names for the top-level roles.
 # For instance: in 'signerlib.py', ROOT_FILENAME = 'root.txt'.
diff --git a/tuf/repo/signercli.py b/tuf/repo/signercli.py
index a2971351..8536a405 100755
--- a/tuf/repo/signercli.py
+++ b/tuf/repo/signercli.py
@@ -58,16 +58,17 @@
 import errno
 
 import tuf
+import tuf.formats
 import tuf.repo.signerlib
 import tuf.repo.keystore
 import tuf.util
 import tuf.log
 
-json = tuf.util.import_json()
-
 # See 'log.py' to learn how logging is handled in TUF.
 logger = logging.getLogger('tuf.signercli')
 
+json = tuf.util.import_json()
+
 # The maximum number of attempts the user has to enter
 # valid input.
 MAX_INPUT_ATTEMPTS = 3
diff --git a/tuf/repo/signerlib.py b/tuf/repo/signerlib.py
index ab30c84f..2698518f 100755
--- a/tuf/repo/signerlib.py
+++ b/tuf/repo/signerlib.py
@@ -24,6 +24,7 @@
 import ConfigParser
 import logging
 
+import tuf
 import tuf.formats
 import tuf.hash
 import tuf.rsa_key
diff --git a/tuf/roledb.py b/tuf/roledb.py
index f6446731..4f114dfc 100755
--- a/tuf/roledb.py
+++ b/tuf/roledb.py
@@ -29,9 +29,10 @@
 
 """
 
-import tuf.formats
 import logging
 
+import tuf
+import tuf.formats
 import tuf.log
 
 # See 'tuf.log' to learn how logging is handled in TUF.
diff --git a/tuf/rsa_key.py b/tuf/rsa_key.py
index bc1767a0..a86a6138 100755
--- a/tuf/rsa_key.py
+++ b/tuf/rsa_key.py
@@ -42,6 +42,8 @@
 import evpy.signature
 import evpy.envelope
 
+import tuf
+
 # Digest objects needed to generate hashes.
 import tuf.hash
 
diff --git a/tuf/sig.py b/tuf/sig.py
index 32faae89..ce5b9f56 100755
--- a/tuf/sig.py
+++ b/tuf/sig.py
@@ -36,6 +36,7 @@
 
 """
 
+import tuf
 import tuf.formats
 import tuf.keydb
 import tuf.roledb
diff --git a/tuf/tests/system_tests/slow_retrieval_server.py b/tuf/tests/system_tests/slow_retrieval_server.py
index 0887d119..161277b6 100755
--- a/tuf/tests/system_tests/slow_retrieval_server.py
+++ b/tuf/tests/system_tests/slow_retrieval_server.py
@@ -24,11 +24,9 @@
 import random
 from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
 
-
 DELAY = 1
 
 
-
 # HTTP request handler.
 class Handler(BaseHTTPRequestHandler):
 
@@ -76,4 +74,4 @@ def run(port):
   else:
     port = get_random_port()
 
-  run(port)
\ No newline at end of file
+  run(port)
diff --git a/tuf/tests/system_tests/test_arbitrary_package_attack.py b/tuf/tests/system_tests/test_arbitrary_package_attack.py
index 1ddcb053..b5f207ce 100755
--- a/tuf/tests/system_tests/test_arbitrary_package_attack.py
+++ b/tuf/tests/system_tests/test_arbitrary_package_attack.py
@@ -40,11 +40,6 @@
 
 
 
-# Disable logging.
-util_test_tools.disable_logging()
-
-
-
 class ArbitraryPackageAlert(Exception):
   pass
 
@@ -149,4 +144,4 @@ def test_arbitrary_package_attack(TUF=False):
   test_arbitrary_package_attack(TUF=True)
 
 except ArbitraryPackageAlert, error:
-  print error
\ No newline at end of file
+  print error
diff --git a/tuf/tests/system_tests/test_endless_data_attack.py b/tuf/tests/system_tests/test_endless_data_attack.py
index 9366accf..4cac5531 100755
--- a/tuf/tests/system_tests/test_endless_data_attack.py
+++ b/tuf/tests/system_tests/test_endless_data_attack.py
@@ -43,12 +43,6 @@
 from tuf.interposition import urllib_tuf
 
 
-
-# Disable logging.
-util_test_tools.disable_logging()
-
-
-
 class EndlessDataAttack(Exception):
   pass
 
diff --git a/tuf/tests/system_tests/test_extraneous_dependencies_attack.py b/tuf/tests/system_tests/test_extraneous_dependencies_attack.py
index 72937d65..de327ea7 100755
--- a/tuf/tests/system_tests/test_extraneous_dependencies_attack.py
+++ b/tuf/tests/system_tests/test_extraneous_dependencies_attack.py
@@ -27,18 +27,17 @@
 import tempfile
 import time
 
-import util_test_tools
+import tuf
+import tuf.formats
+import tuf.tests.system_tests.util_test_tools
 import tuf.repo.keystore
 import tuf.repo.signerlib as signerlib
 import tuf.repo.signercli as signercli
 from tuf.interposition import urllib_tuf
 
-
-# Disable logging.
-util_test_tools.disable_logging()
-
 version = 1
 
+
 class ExtraneousDependenciesAttackAlert(Exception):
   pass
 
diff --git a/tuf/tests/system_tests/test_indefinite_freeze_attack.py b/tuf/tests/system_tests/test_indefinite_freeze_attack.py
index 9a5bb1a0..85f457d2 100755
--- a/tuf/tests/system_tests/test_indefinite_freeze_attack.py
+++ b/tuf/tests/system_tests/test_indefinite_freeze_attack.py
@@ -27,21 +27,16 @@
 import tempfile
 import util_test_tools
 
+import tuf
 import tuf.formats
 import tuf.repo.signerlib as signerlib
 from tuf.interposition import urllib_tuf
 
 
-# Disable logging.
-util_test_tools.disable_logging()
-
-
-
 class IndefiniteFreezeAttackAlert(Exception):
   pass
 
 
-
 EXPIRATION = 1  # second(s)
 version = 1
 
diff --git a/tuf/tests/system_tests/test_mix_and_match_attack.py b/tuf/tests/system_tests/test_mix_and_match_attack.py
index 94c40057..29ee9fcf 100755
--- a/tuf/tests/system_tests/test_mix_and_match_attack.py
+++ b/tuf/tests/system_tests/test_mix_and_match_attack.py
@@ -44,11 +44,6 @@
 from tuf.interposition import urllib_tuf
 
 
-# Disable logging.
-util_test_tools.disable_logging()
-
-
-
 class MixAndMatchAttackAlert(Exception):
   pass
 
@@ -195,4 +190,4 @@ def test_mix_and_match_attack(TUF=False):
 try:
   test_mix_and_match_attack(TUF=True)
 except MixAndMatchAttackAlert, error:
-  print error
\ No newline at end of file
+  print error
diff --git a/tuf/tests/system_tests/test_replay_attack.py b/tuf/tests/system_tests/test_replay_attack.py
index 4250a854..1c190dfa 100755
--- a/tuf/tests/system_tests/test_replay_attack.py
+++ b/tuf/tests/system_tests/test_replay_attack.py
@@ -38,16 +38,10 @@
 import urllib
 import tempfile
 
-import util_test_tools
+import tuf.tests.system_tests.util_test_tools as util_test_tools
 from tuf.interposition import urllib_tuf
 
 
-
-# Disable logging.
-util_test_tools.disable_logging()
-
-
-
 class TestSetupError(Exception):
   pass
 
@@ -189,4 +183,4 @@ def test_replay_attack(TUF=False):
 try:
   test_replay_attack(TUF=True)
 except ReplayAttackAlert, error:
-  print error
\ No newline at end of file
+  print error
diff --git a/tuf/tests/system_tests/test_slow_retrieval_attack.py b/tuf/tests/system_tests/test_slow_retrieval_attack.py
index d2f9f4d9..7d25a7d2 100755
--- a/tuf/tests/system_tests/test_slow_retrieval_attack.py
+++ b/tuf/tests/system_tests/test_slow_retrieval_attack.py
@@ -42,15 +42,10 @@
 import subprocess
 from multiprocessing import Process
 
-import util_test_tools
+import tuf.tests.system_tests.util_test_tools as util_test_tools
 from tuf.interposition import urllib_tuf
 
 
-# Disable logging.
-util_test_tools.disable_logging()
-
-
-
 class SlowRetrievalAttackAlert(Exception):
   pass
 
@@ -72,7 +67,8 @@ def test_slow_retrieval_attack(TUF=False):
   # Launch the server.
   port = random.randint(30000, 45000)
   command = ['python', 'slow_retrieval_server.py', str(port)]
-  server_process = subprocess.Popen(command, stderr=subprocess.PIPE)
+  server_process = subprocess.Popen(command, stdout=subprocess.PIPE,
+                                             stderr=subprocess.PIPE)
   time.sleep(.1)
 
   try:
@@ -134,4 +130,4 @@ def test_slow_retrieval_attack(TUF=False):
 try:
   test_slow_retrieval_attack(TUF=True)
 except SlowRetrievalAttackAlert, error:
-  print error
\ No newline at end of file
+  print error
diff --git a/tuf/tests/system_tests/util_test_tools.py b/tuf/tests/system_tests/util_test_tools.py
index 1e5714c0..25f710c0 100755
--- a/tuf/tests/system_tests/util_test_tools.py
+++ b/tuf/tests/system_tests/util_test_tools.py
@@ -137,6 +137,7 @@
 import subprocess
 
 import tuf
+import tuf.formats
 import tuf.interposition
 import tuf.util
 import tuf.client.updater
@@ -144,13 +145,7 @@
 import tuf.repo.signerlib as signerlib
 import tuf.repo.keystore as keystore
 
-logger = logging.getLogger('tuf')
-
-# Disable logging for cleaner output.
-def disable_logging():
-  logging.getLogger('tuf')
-  logging.disable(logging.CRITICAL)
-
+logger = logging.getLogger('tuf.tests.system_tests.util_test_tools')
 
 PASSWD = 'test'
 version = 1
@@ -174,7 +169,8 @@ def init_repo(tuf=False, port=None):
     # Start a simple server pointing to the repository directory.
     port = random.randint(30000, 45000)
     command = ['python', '-m', 'SimpleHTTPServer', str(port)]
-    server_proc = subprocess.Popen(command, stderr=subprocess.PIPE)
+    server_proc = subprocess.Popen(command, stdout=subprocess.PIPE,
+                                   stderr=subprocess.PIPE)
 
   # Tailor url for the repository.  In order to download a 'file.txt' 
   # from 'reg_repo' do: url+'reg_repo/file.txt'
diff --git a/tuf/tests/test_download.py b/tuf/tests/test_download.py
index 96716875..d2e0e38d 100755
--- a/tuf/tests/test_download.py
+++ b/tuf/tests/test_download.py
@@ -19,12 +19,9 @@
 
 NOTE: Make sure test_download.py is ran in 'tuf/tests/' directory.
 Otherwise, module that launches simple server would not be found.  
+
 """
 
-import tuf
-import tuf.log
-import tuf.download as download
-import tuf.tests.unittest_toolbox as unittest_toolbox
 
 import os
 import sys
@@ -37,11 +34,12 @@
 import SocketServer
 import SimpleHTTPServer
 
-logger = logging.getLogger('tuf')
+import tuf
+import tuf.log
+import tuf.download as download
+import tuf.tests.unittest_toolbox as unittest_toolbox
 
-# Disable/Enable logging.  Comment-out to Enable logging.
-logging.getLogger('tuf')
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_download')
 
 
 class TestDownload(unittest_toolbox.Modified_TestCase):
diff --git a/tuf/tests/test_formats.py b/tuf/tests/test_formats.py
index ecc5338b..1e375ca3 100755
--- a/tuf/tests/test_formats.py
+++ b/tuf/tests/test_formats.py
@@ -20,6 +20,7 @@
 
 import unittest
 
+import tuf
 import tuf.formats
 import tuf.schema
 
diff --git a/tuf/tests/test_hash.py b/tuf/tests/test_hash.py
index 0a56c175..8e634a81 100755
--- a/tuf/tests/test_hash.py
+++ b/tuf/tests/test_hash.py
@@ -23,9 +23,12 @@
 import tempfile
 import unittest
 
+import tuf
+import tuf.log
 import tuf.hash
 
-logger = logging.getLogger('tuf')
+logger = logging.getLogger('tuf.test_hash')
+
 
 if not 'hashlib' in tuf.hash._supported_libraries:
   logger.warn('Not testing hashlib: could not be imported.')
diff --git a/tuf/tests/test_keydb.py b/tuf/tests/test_keydb.py
index 7e61f223..c7330875 100755
--- a/tuf/tests/test_keydb.py
+++ b/tuf/tests/test_keydb.py
@@ -19,15 +19,13 @@
 import unittest
 import logging
 
+import tuf
+import tuf.formats
 import tuf.rsa_key
 import tuf.keydb
 import tuf.log
 
-logger = logging.getLogger('tuf')
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_keydb')
 
 
 # Generate the three keys to use in our test cases.
diff --git a/tuf/tests/test_keystore.py b/tuf/tests/test_keystore.py
index 816f400a..5302d5f2 100755
--- a/tuf/tests/test_keystore.py
+++ b/tuf/tests/test_keystore.py
@@ -21,16 +21,14 @@
 import os
 import logging
 
+import tuf
 import tuf.repo.keystore
 import tuf.rsa_key
 import tuf.formats
 import tuf.util
+import tuf.log
 
-logger = logging.getLogger('tuf')
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_keystore')
 
 # We'll need json module for testing '_encrypt()' and '_decrypt()'
 # internal function.
diff --git a/tuf/tests/test_push.py b/tuf/tests/test_push.py
index 699881c0..c491b22f 100755
--- a/tuf/tests/test_push.py
+++ b/tuf/tests/test_push.py
@@ -24,20 +24,17 @@
 import ConfigParser
 
 import tuf
+import tuf.log
 import tuf.pushtools.push as push
 import tuf.pushtools.transfer.scp as scp
 import tuf.pushtools.pushtoolslib as pushtoolslib
-import system_tests.util_test_tools as util_test_tools
+import tuf.tests.system_tests.util_test_tools as util_test_tools
 
-logger = logging.getLogger('tuf')
+logger = logging.getLogger('tuf.test_push')
 
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
 
 class TestPush(unittest.TestCase):
   src_push_dict = {}
-  logger.info(scp.transfer)
   
   ORIGINAL_PUSH_CONFIG = pushtoolslib.PUSH_CONFIG
 
diff --git a/tuf/tests/test_pushtoolslib.py b/tuf/tests/test_pushtoolslib.py
index 60c4975f..e0cf6694 100755
--- a/tuf/tests/test_pushtoolslib.py
+++ b/tuf/tests/test_pushtoolslib.py
@@ -20,10 +20,14 @@
 import tempfile
 import unittest
 import ConfigParser
+import logging
 
+import tuf
+import tuf.log
 import tuf.formats
 import tuf.pushtools.pushtoolslib as pushtoolslib
 
+logger = logging.getLogger('tuf.test_pushtoolslib')
 
 
 class TestPushtoolslib(unittest.TestCase):
diff --git a/tuf/tests/test_quickstart.py b/tuf/tests/test_quickstart.py
index f0ec3544..a211f905 100755
--- a/tuf/tests/test_quickstart.py
+++ b/tuf/tests/test_quickstart.py
@@ -25,19 +25,19 @@
 import shutil
 import unittest
 import logging
-import tuf.repo.quickstart as quickstart
 
+import tuf
+import tuf.log
+import tuf.repo.quickstart as quickstart
 import tuf.util
 import tuf.tests.unittest_toolbox
 
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
-
+logger = logging.getLogger('tuf.test_quickstart')
 unit_tbox = tuf.tests.unittest_toolbox.Modified_TestCase
 
 
+logger.info('from test_quickstart')
+
 class TestQuickstart(unit_tbox):
   def test_1_get_password(self):
     
diff --git a/tuf/tests/test_roledb.py b/tuf/tests/test_roledb.py
index 7badf680..6d068054 100755
--- a/tuf/tests/test_roledb.py
+++ b/tuf/tests/test_roledb.py
@@ -16,20 +16,18 @@
 
 """
 
+
 import unittest
 import logging
 
+import tuf
 import tuf.formats
 import tuf.rsa_key
 import tuf.roledb
 import tuf.log
 
+logger = logging.getLogger('tuf.test_roledb')
 
-logger = logging.getLogger('tuf')
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
 
 # Generate the three keys to use in our test cases.
 KEYS = []
diff --git a/tuf/tests/test_rsa_key.py b/tuf/tests/test_rsa_key.py
index d6543378..a7b8708d 100755
--- a/tuf/tests/test_rsa_key.py
+++ b/tuf/tests/test_rsa_key.py
@@ -23,10 +23,14 @@
 """
 
 import unittest
+import logging
 
+import tuf
+import tuf.log
 import tuf.formats
 import tuf.rsa_key
 
+logger = logging.getLogger('tuf.test_rsa_key')
 
 RSA_KEY = tuf.rsa_key
 FORMAT_ERROR_MSG = 'tuf.FormatError was raised! Check object\'s format.'
diff --git a/tuf/tests/test_schema.py b/tuf/tests/test_schema.py
index f72ae02b..66320a01 100755
--- a/tuf/tests/test_schema.py
+++ b/tuf/tests/test_schema.py
@@ -17,9 +17,14 @@
 """
 
 import unittest
+import logging
 
+import tuf
+import tuf.log
 import tuf.schema
 
+logger = logging.getLogger('tuf.test_schema')
+
 
 class TestSchema(unittest.TestCase):
   def setUp(self):
diff --git a/tuf/tests/test_sig.py b/tuf/tests/test_sig.py
index dd302748..efdbe516 100755
--- a/tuf/tests/test_sig.py
+++ b/tuf/tests/test_sig.py
@@ -17,13 +17,19 @@
 
 """
 
-import unittest
 
+import unittest
+import logging
+
+import tuf
+import tuf.log
+import tuf.formats
 import tuf.keydb
 import tuf.roledb
 import tuf.rsa_key
 import tuf.sig
 
+logger = logging.getLogger('tuf.test_sig')
 
 # Setup the keys to use in our test cases.
 KEYS = []
diff --git a/tuf/tests/test_signercli.py b/tuf/tests/test_signercli.py
index aa91d862..61ba1ef4 100755
--- a/tuf/tests/test_signercli.py
+++ b/tuf/tests/test_signercli.py
@@ -42,28 +42,25 @@ class guarantees the order of unit tests.  So that, 'test_something_A'
 import unittest
 
 import tuf
+import tuf.log
 import tuf.formats
 import tuf.util
 import tuf.repo.keystore as keystore
 import tuf.repo.signerlib as signerlib
+
 #  Module to test: signercli.py
 import tuf.repo.signercli as signercli
+
 #  Helper module unittest_toolbox.py
 import tuf.tests.unittest_toolbox as unittest_toolbox
 
-
-logger = logging.getLogger('tuf')
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_signercli')
 
 # Populating 'rsa_keystore' and 'rsa_passwords' dictionaries.
 # We will need them when creating keystore directories.
 unittest_toolbox.Modified_TestCase.bind_keys_to_roles()
 
 
-
 class TestSignercli(unittest_toolbox.Modified_TestCase):
   # SETUP 
   original_prompt = signercli._prompt
diff --git a/tuf/tests/test_signerlib.py b/tuf/tests/test_signerlib.py
index dcb47993..9008350e 100755
--- a/tuf/tests/test_signerlib.py
+++ b/tuf/tests/test_signerlib.py
@@ -54,6 +54,8 @@
 import logging
 import unittest
 
+import tuf
+import tuf.log
 import tuf.util
 import tuf.formats as formats
 import tuf.repo.signerlib as signerlib
@@ -61,12 +63,7 @@
 
 import tuf.tests.unittest_toolbox
 
-
-logger = logging.getLogger('tuf')
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_signerlib')
 
 # 'unittest_toolbox.Modified_TestCase' is too long, I'll set it to 'unit_tbox'.
 unit_tbox = tuf.tests.unittest_toolbox.Modified_TestCase
diff --git a/tuf/tests/test_updater.py b/tuf/tests/test_updater.py
index d32664e7..dc708d62 100755
--- a/tuf/tests/test_updater.py
+++ b/tuf/tests/test_updater.py
@@ -43,6 +43,9 @@ class guarantees the order of unit tests.  So that, 'test_something_A'
 import logging
 import unittest
 
+
+import tuf
+import tuf.log
 import tuf.util
 import tuf.formats
 import tuf.repo.keystore as keystore
@@ -51,11 +54,7 @@ class guarantees the order of unit tests.  So that, 'test_something_A'
 import tuf.tests.repository_setup as setup
 import tuf.tests.unittest_toolbox as unittest_toolbox
 
-logger = logging.getLogger('tuf')
-
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_updater')
 
 #  References to roledb and keydb dictionaries (improve readability).
 roledb = tuf.roledb
diff --git a/tuf/tests/test_util.py b/tuf/tests/test_util.py
index aa4f0d9b..561e1cc7 100755
--- a/tuf/tests/test_util.py
+++ b/tuf/tests/test_util.py
@@ -30,9 +30,7 @@
 import tuf.util as util
 import tuf.tests.unittest_toolbox as unittest_toolbox
 
-# Disable all logging calls of level CRITICAL and below.
-# Comment the line below to enable logging.
-logging.disable(logging.CRITICAL)
+logger = logging.getLogger('tuf.test_util')
 
 
 class TestUtil(unittest_toolbox.Modified_TestCase):
diff --git a/tuf/tests/unittest_toolbox.py b/tuf/tests/unittest_toolbox.py
index 5c8b54ff..673c8ceb 100755
--- a/tuf/tests/unittest_toolbox.py
+++ b/tuf/tests/unittest_toolbox.py
@@ -158,11 +158,6 @@ def setUp(self):
 
 
   def tearDown(self):
-    # Removing 'tuf.log' file from current working directory.
-    tuf_log_path = os.path.join(os.getcwd(), 'tuf.log')
-    if os.path.exists(tuf_log_path):
-      os.unlink(tuf_log_path)
-
     for cleanup_function in self._cleanup:
       # Perform clean up by executing clean-up functions.
       try:
diff --git a/tuf/util.py b/tuf/util.py
index c1a114a9..6651cb85 100755
--- a/tuf/util.py
+++ b/tuf/util.py
@@ -27,6 +27,7 @@
 import logging
 import tempfile
 
+import tuf
 import tuf.hash
 import tuf.conf
 import tuf.formats