diff --git a/tox.ini b/tox.ini
index a0ee19039..f1df4acc3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,6 +20,17 @@ setenv =
 commands =
          python misc/build_helpers/run-deprecations.py --stderr=_trial_temp/stderr.log trial --rterrors {posargs:allmydata}
 
+[testenv:upcoming-deprecations]
+basepython=python2.7
+passenv = USERPROFILE HOMEDRIVE HOMEPATH
+setenv =
+         PYTHONWARNINGS=default::DeprecationWarning
+deps =
+     git+https://github.com/twisted/twisted
+     git+https://github.com/warner/foolscap
+commands =
+         python misc/build_helpers/run-deprecations.py --stderr=_trial_temp/stderr.log trial --rterrors {posargs:allmydata}
+
 [testenv:checkmemory]
 commands =
          rm -rf _test_memory