diff --git a/doc/en/how-to/doctest.rst b/doc/en/how-to/doctest.rst
index f70d28ce1..2cec984f9 100644
--- a/doc/en/how-to/doctest.rst
+++ b/doc/en/how-to/doctest.rst
@@ -224,9 +224,9 @@ place the objects you want to appear in the doctest namespace:
 .. code-block:: python
 
     # content of conftest.py
+    import pytest
     import numpy
 
-
     @pytest.fixture(autouse=True)
     def add_np(doctest_namespace):
         doctest_namespace["np"] = numpy