diff --git a/tox.ini b/tox.ini
index e2a761372..5137af0f4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -31,6 +31,17 @@ commands =
     {envpython} scripts/link_pyqt.py --tox {envdir}
     {envpython} -m py.test --strict -rfEsw {posargs:tests}
 
+[testenv:unittests-watch]
+setenv = {[testenv:unittests]setenv}
+passenv = {[testenv:unittests]passenv}
+deps =
+    {[testenv:unittests]deps}
+    pytest-testmon==0.6
+    pytest-watch==3.2.0
+commands =
+    {envpython} scripts/link_pyqt.py --tox {envdir}
+    {envdir}/bin/ptw -- --testmon --strict -rfEsw {posargs:tests}
+
 [testenv:unittests-frozen]
 setenv = {[testenv:unittests]setenv}
 passenv = {[testenv:unittests]passenv}