diff --git a/DEVELOPER_GUIDE.rst b/DEVELOPER_GUIDE.rst
index c0d2f85668..471890c9cd 100644
--- a/DEVELOPER_GUIDE.rst
+++ b/DEVELOPER_GUIDE.rst
@@ -405,7 +405,7 @@ Sample test class:
 Doctest
 >>>>>>>
 
-Python doctest library makes our document executable which keeps it up-to-date to source code. The doc generator aforementioned served as scaffolding and generated many docs in short time. Now the examples inside is changed to doctest gradually. For more details please read `Doctest <./dev/Doctest.md>`_.
+Python doctest library makes our document executable which keeps it up-to-date to source code. The doc generator aforementioned served as scaffolding and generated many docs in short time. Now the examples inside is changed to doctest gradually. For more details please read `Doctest <./docs/dev/testing-doctest.md>`_.
 
 
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