diff --git a/tox.ini b/tox.ini
index 69fce6615..febf1a2d0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,15 +8,23 @@
 skipsdist = true
 envlist = py27,cover,lint
 
+# nosetest -v => more verbose output, allows to detect busy waiting
+# loops, especially on Travis
+
 [testenv]
+# packages installed separately to ensure that dowstream deps problems
+# are detected, c.f. #1002
 commands =
-    pip install -r requirements.txt -e acme -e .[testing] -e letsencrypt-apache -e letsencrypt-nginx -e letshelp-letsencrypt
-    # -q does not suppress errors
-    python setup.py test
-    python setup.py test -s acme
-    python setup.py test -s letsencrypt_apache
-    python setup.py test -s letsencrypt_nginx
-    python setup.py test -s letshelp_letsencrypt
+    pip install -e acme[testing]
+    nosetests -v acme
+    pip install -r requirements.txt -e .[testing]
+    nosetests -v letsencrypt
+    pip install -e letsencrypt-apache
+    nosetests -v letsencrypt_apache
+    pip install -e letsencrypt-nginx
+    nosetests -v letsencrypt_nginx
+    pip install -e letshelp-letsencrypt
+    nosetests -v letshelp_letsencrypt
 
 setenv =
     PYTHONPATH = {toxinidir}
@@ -26,12 +34,12 @@ setenv =
 [testenv:py33]
 commands =
     pip install -e acme[testing]
-    nosetests acme
+    nosetests -v acme
 
 [testenv:py34]
 commands =
     pip install -e acme[testing]
-    nosetests acme
+    nosetests -v acme
 
 [testenv:cover]
 basepython = python2.7