diff --git a/tox.ini b/tox.ini
index 347c60d69..1d02a982e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -123,9 +123,12 @@ setenv = LANG=en_US.UTF-8
 passenv =
 deps =
     -r{toxinidir}/requirements.txt
+    apipkg==1.4
+    execnet==1.4.1
     py==1.4.30
-    pytest==2.8.2
     pyflakes==1.0.0
+    pytest==2.8.2
+    pytest-cache==1.0
     pytest-flakes==1.0.1
 commands =
     {envpython} -m py.test -q --flakes --ignore=tests --noconftest
@@ -135,9 +138,12 @@ basepython = python3
 passenv =
 deps =
     -r{toxinidir}/requirements.txt
+    apipkg==1.4
+    execnet==1.4.1
+    pep8==1.6.2
     py==1.4.30
     pytest==2.8.2
-    pep8==1.6.2
+    pytest-cache==1.0
     pytest-pep8==1.0.6
 commands =
     {envpython} -m py.test -q --pep8 --ignore=tests --noconftest
@@ -148,9 +154,12 @@ basepython = python3
 passenv =
 deps =
     -r{toxinidir}/requirements.txt
+    apipkg==1.4
+    execnet==1.4.1
+    mccabe==0.3.1
     py==1.4.30
     pytest==2.8.2
-    mccabe==0.3.1
+    pytest-cache==1.0
     pytest-mccabe==0.1
 commands =
     {envpython} -m py.test -q --mccabe --ignore=tests --noconftest