diff --git a/test-requirements.txt b/test-requirements.txt
index 9d540674..11610a02 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -20,3 +20,7 @@ sphinx_rtd_theme==0.2.4
 pifpaf==0.10.0
 reno>=2.5.0 # Apache-2.0
 pytest-html==1.16.0
+
+# NOTE(fmontei): The requirement below is only included because readthedocs
+# depends on it to work, since it runs pip install -rtest-requirements.txt.
+oslo.policy>=1.23.0 # Apache-2.0