diff --git a/.travis.yml b/.travis.yml
index 818f521..bd654ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,27 @@
 language: python
-python:
-  - "2.7"
-  - "3.3"
-  - "3.4"
-  - "3.5"
-
+matrix:
+    include:
+        - os: linux
+          python: 2.6
+          cache: pip
+        - os: linux
+          python: 2.7
+        - os: linux
+          python: 3.3
+        - os: linux
+          python: 3.4
+        - os: linux
+          python: 3.5
+        - os: linux
+          python: 3.6
+        - os: linux
+          python: 3.7
+        - os: linux
+          python: 3.8
+        - os: linux
+          python: 3.9
 install:
+  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install pycparser==2.18; pip install unittest2; fi
   - pip install -r requirements.txt
   - pip install coveralls
 script: nosetests -s -v --with-coverage --cover-package=inotify
diff --git a/inotify/adapters.py b/inotify/adapters.py
index 8a67347..1a5baf4 100644
--- a/inotify/adapters.py
+++ b/inotify/adapters.py
@@ -166,7 +166,7 @@ def _handle_inotify_event(self, wd):
 
             header = _INOTIFY_EVENT(*header_raw)
             type_names = self._get_event_names(header.mask)
-            _LOGGER.debug("Events received in stream: {}".format(type_names))
+            _LOGGER.debug("Events received in stream: {0}".format(type_names))
 
             event_length = (_STRUCT_HEADER_LENGTH + header.len)
             if length < event_length:
@@ -225,7 +225,7 @@ def event_gen(
                 # (fd) looks to always match the inotify FD.
 
                 names = self._get_event_names(event_type)
-                _LOGGER.debug("Events received from epoll: {}".format(names))
+                _LOGGER.debug("Events received from epoll: {0}".format(names))
 
                 for (header, type_names, path, filename) \
                         in self._handle_inotify_event(fd):
diff --git a/tests/test_inotify.py b/tests/test_inotify.py
index 0f87524..6ca8040 100644
--- a/tests/test_inotify.py
+++ b/tests/test_inotify.py
@@ -1,7 +1,11 @@
 # -*- coding: utf-8 -*-
 
 import os
-import unittest
+import sys
+if sys.version_info < (2, 7):
+    import unittest2 as unittest
+else:
+    import unittest
 
 import inotify.constants
 import inotify.adapters