diff --git a/.travis.yml b/.travis.yml
index b2049a675..0cb37cfe8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,11 @@ before_install:
 script:
 - >
     docker run -v $TRAVIS_BUILD_DIR:/entropy sabayon/base-amd64
-    bash -c "equo i dev-util/bsdiff; cd /entropy/lib/tests && LC_ALL=en_US.UTF-8 USERNAME=root ETP_TESTS_NONINTERACTIVE=1 ./run"
+    bash -c "python2 --version; python3 --version"
+- >
+    docker run -v $TRAVIS_BUILD_DIR:/entropy sabayon/base-amd64
+    env LC_ALL=en_US.UTF-8 USERNAME=root ETP_TESTS_NONINTERACTIVE=1
+    bash -c 'equo i dev-util/bsdiff; cd /entropy/lib/tests && ret=0 && { python2 ./run || ret=$?; python3 ./run || ret=$?; }; exit $ret'
 
 notifications:
   irc: "chat.freenode.net#sabayon-infra"
diff --git a/lib/entropy/tools.py b/lib/entropy/tools.py
index dbec9d7ea..ee31d9b94 100644
--- a/lib/entropy/tools.py
+++ b/lib/entropy/tools.py
@@ -1098,7 +1098,7 @@ def universal_uncompress(compressed_file, dest_path, catch_empty = False):
         for tarinfo in directories:
             epath = os.path.join(dest_path, tarinfo.name)
             try:
-                tar.chown(tarinfo, epath)
+                _tarfile_chown(tar, tarinfo, epath)
 
                 # this is mandatory on uid/gid that don't exist
                 # and in this strict order !!
@@ -2036,6 +2036,13 @@ def _fix_uid_gid(tarinfo, epath):
     except OSError:
         pass
 
+def _tarfile_chown(tar, tarinfo, targetpath):
+    if const_is_python3():
+        return tar.chown(tarinfo, targetpath,
+                         numeric_owner=False)
+    else:
+        return tar.chown(tarinfo, targetpath)
+
 def apply_tarball_ownership(filepath, prefix_path):
     """
     Given an already extracted tarball available at prefix_path, and the
@@ -2064,7 +2071,7 @@ def apply_tarball_ownership(filepath, prefix_path):
             epath = os.path.join(encoded_path, tarinfo.name)
 
             try:
-                tar.chown(tarinfo, epath)
+                _tarfile_chown(tar, tarinfo, epath)
                 _fix_uid_gid(tarinfo, epath)
                 if not os.path.islink(epath):
                     # make sure we keep the same permissions
@@ -2107,7 +2114,7 @@ def uncompress_tarball(filepath, extract_path = None, catch_empty = False):
 
     def _setup_file_metadata(tarinfo, epath):
         try:
-            tar.chown(tarinfo, epath)
+            _tarfile_chown(tar, tarinfo, epath)
             _fix_uid_gid(tarinfo, epath)
 
             # no longer touch utime using Tarinfo, behaviour seems
diff --git a/lib/tests/db.py b/lib/tests/db.py
index 6d851d479..fec0a7f36 100644
--- a/lib/tests/db.py
+++ b/lib/tests/db.py
@@ -873,7 +873,7 @@ class EntropyRepositoryTest(unittest.TestCase):
         assert set(data.keys()) == set(db_data.keys())
         for k, v in data.items():
             if v != db_data[k]:
-                print k, v, "vs", db_data[k]
+                print(k, v, "vs", db_data[k])
         self.assertEqual(data, db_data)
 
         set_mute(True)