diff --git a/tox.ini b/tox.ini
index 7822f39..831bd98 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,6 @@
 [tox]
 # NOTE: Running "./setup.py check" generates "version.py", required for
 #       some testing
-# FIXME: run installtest
-# FIXME: black in python3 mode, let this replace the flake8 invocations
 # FIXME: pytest in python2 mode
 # FIXME: pytest in python3 mode
 # FIXME: create px.pex in python2 mode
@@ -18,11 +16,13 @@
 # FIXME: pip uninstall --yes pxpx, then pip install pxpx-*.whl
 #        verify that px bash doesn't fail
 #        verify px --version against "git describe --dirty"
+# FIXME: black in python3 mode, let this replace the flake8 invocations
 
 envlist=
     mypy2,
     mypy3,
     shellcheck
+    installtest
 
 [testenv:mypy2]
 basepython = python3
@@ -48,3 +48,8 @@ commands =
 skip_install = true
 commands =
     /bin/bash -c 'shellcheck ./*.sh ./*/*.sh'
+
+[testenv:installtest]
+skip_install = true
+commands =
+    {toxinidir}/tests/installtest.sh