diff --git a/python-repoze.sphinx.autointerface.spec b/python-repoze.sphinx.autointerface.spec
index 6f74b4d..4a29a71 100644
--- a/python-repoze.sphinx.autointerface.spec
+++ b/python-repoze.sphinx.autointerface.spec
@@ -51,7 +51,7 @@ zope.interface instances in code.
 %pyproject_install
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 # do not install tests
-%python_expand rm -rf %{$python_sitelib}/repoze/sphinx/tests
+%python_expand rm -rf %{buildroot}%{$python_sitelib}/repoze/sphinx/tests
 
 %files %{python_files}
 %license LICENSE.txt