diff --git a/tox.ini b/tox.ini
index 21a1567921..4b58dd205b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -38,6 +38,7 @@ commands = ostestr --slowest {posargs}
 [testenv:functional]
 setenv =
   TEST_PATH = ./glance/tests/functional
+ignore_errors = True
 commands =
   stestr run --blacklist-file ./serial-functests.txt {posargs}
   stestr run --serial --combine --whitelist-file ./serial-functests.txt {posargs}
@@ -46,6 +47,7 @@ commands =
 basepython = python3.5
 setenv =
   TEST_PATH = ./glance/tests/functional
+ignore_errors = True
 commands =
   stestr run --blacklist-file ./serial-functests.txt {posargs}
   stestr run --serial --combine --whitelist-file ./serial-functests.txt {posargs}