diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 00000000..258cfb7c
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+python_files = test*.py
\ No newline at end of file
diff --git a/tests.py b/tests.py
new file mode 100644
index 00000000..bd45004a
--- /dev/null
+++ b/tests.py
@@ -0,0 +1,9 @@
+from __future__ import unicode_literals
+from tqdm import format_interval
+
+
+def test_format_interval():
+    assert format_interval(60) == '01:00'
+    assert format_interval(6160) == '1:42:40'
+    assert format_interval(238113) == '66:08:33'
+
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 00000000..ecd9f5e9
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,12 @@
+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py26, py27, py32
+
+[testenv]
+commands = py.test
+deps =
+    pytest
\ No newline at end of file