diff --git a/Makefile b/Makefile
index 9a80e74..e23ca40 100644
--- a/Makefile
+++ b/Makefile
@@ -13,3 +13,8 @@ html:
 pdf:
 	make -C docs latexpdf
 
+tests:
+	py.test-3 tests
+
+.PHONY: clean zip html pdf tests
+
diff --git a/requirements.txt b/requirements.txt
index fe4bbde..f620c2c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 sphinx
+pytest
 
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_ap.py b/tests/test_ap.py
new file mode 100644
index 0000000..23e2258
--- /dev/null
+++ b/tests/test_ap.py
@@ -0,0 +1,19 @@
+import os
+import sys
+sys.path.insert(0, os.path.abspath('..'))
+
+import pytest
+from py3x.functions import parse_args
+
+def test_parse_args_verbose():
+    args = parse_args(['-v'])
+    assert args
+
+def test_parse_args_input():
+    args = parse_args(['-i', 'input'])
+    assert args
+
+def test_parse_args_unused():
+    with pytest.raises(SystemExit):
+        args = parse_args(['-b'])
+