diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9033955
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+ext:
+	python setup.py build_ext --inplace
+
+test:
+	python -m pytest
+
+clean:
+	python setup.py clean --all
+	find pyModeS/c_decoder -type f -name '*.c' -delete
+	find pyModeS/c_decoder -type f -name '*.so' -delete
diff --git a/README.rst b/README.rst
index 1470c56..51a2bed 100644
--- a/README.rst
+++ b/README.rst
@@ -321,8 +321,19 @@ Here is an example:
 
 Unit test
 ---------
-To perform unit tests. First, install ``tox`` through pip. Then, run the following commands:
+To perform unit tests, ``pytest`` must be install first.
 
-.. code:: bash
+Build Cython extensions
+::
 
-  $ tox
+  $ make ext
+
+Run unit tests
+::
+
+  $ make test
+
+Clean build files
+::
+
+  $ make clean
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 9a0ca74..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,11 +0,0 @@
-[tox]
-toxworkdir = /tmp/tox
-envlist = py2,py3
-
-[testenv]
-deps =
-  pytest
-  numpy
-  pyzmq
-  pyrtlsdr
-commands = py.test