diff --git a/test-requirements.txt b/test-requirements.txt
index 170f24c270..c85bc5bfcf 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,4 +10,5 @@ zuul-sphinx>=0.2.3
 testtools
 mock
 # testinfra 1.17.0 has a broken wheel that won't install under python3
-testinfra!=1.17.0
+# testinfra 3.0.0 switched the ansible backend, but broke ipv6 handling
+testinfra!=1.17.0,!=3.0.0