diff --git a/test-requirements.txt b/test-requirements.txt
index 1ea50a8..152ebef 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,7 @@
 # This is required for the docs build jobs
-sphinx>=1.5.1  # BSD
+sphinx!=1.6.1,>=1.5.1 # BSD
 oslosphinx>=4.7.0  # Apache-2.0
 
 # This is required for the releasenotes build jobs
 # FIXME: reno is manually pinned to !=2.0.0 because of bug #1651995
-reno>=1.8.0,!=2.0.0  # Apache-2.0
+reno!=2.0.0,!=2.3.1,>=1.8.0 # Apache-2.0