diff --git a/tangostationcontrol/test-requirements.txt b/tangostationcontrol/test-requirements.txt
index 726193534b7253aa200e4876ddff77ff43a2ff4f..9c0aa76bdf9fb625f94179426336d5774092d13b 100644
--- a/tangostationcontrol/test-requirements.txt
+++ b/tangostationcontrol/test-requirements.txt
@@ -16,7 +16,7 @@ flake8-breakpoint>=1.1.0 # MIT
 flake8-debugger>=4.0.0 #MIT
 pylint>=2.15.0 # GPLv2
 autopep8>=1.7.0 # MIT
-python-subunit>=1.4.0 # Apache-2.0/BSD
+python-subunit<1.4.3,>=1.4.0 # Apache-2.0/BSD
 Pygments>=2.6.0 # BSD
 stestr>=3.0.0 # Apache-2.0
 testscenarios>=0.5.0 # Apache-2.0/BSD