diff --git a/pytest.ini b/pytest.ini
index 942d738..6f1ef58 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,3 +1,3 @@
 [pytest]
 flake8-ignore = E501
-addopts = --flake8 --doctest-modules
+addopts = --flake8
diff --git a/tests/test_functions.py b/tests/test_functions.py
new file mode 100644
index 0000000..6a3c2b4
--- /dev/null
+++ b/tests/test_functions.py
@@ -0,0 +1,7 @@
+import nbstripout
+
+
+def test_pos_recursive():
+    d = {'a': {'b': 1, 'c': 2}}
+    assert nbstripout.pop_recursive(d, 'a.c') == 2
+    assert d  == {'a': {'b': 1}}