diff --git a/python-cornice-sphinx.spec b/python-cornice-sphinx.spec
index bac9745..9e46b6a 100644
--- a/python-cornice-sphinx.spec
+++ b/python-cornice-sphinx.spec
@@ -16,7 +16,7 @@ Patch0:           0000-Don-t-install-the-tests.patch
 
 
 BuildRequires: %{py3_dist cornice} >= 3.0.0
-BuildRequires: %{py3_dist docutils nose setuptools sphinx}
+BuildRequires: %{py3_dist docutils nose setuptools sphinx mock}
 BuildRequires: python3-devel