diff --git a/.drone.yml b/.drone.yml
index cdb0339..747fc63 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -10,7 +10,7 @@ steps:
       PY_COLORS: "1"
     commands:
       - pip install tox -q
-      - tox -e $(tox -l | grep py27 | xargs | sed 's/ /,/g') -q
+      - tox -e $(tox -l | grep py27 | xargs | sed 's/ /,/g') -p -q
     when:
       event:
         - push
@@ -23,7 +23,7 @@ steps:
       PY_COLORS: "1"
     commands:
       - pip install tox -q
-      - tox -e $(tox -l | grep py35 | xargs | sed 's/ /,/g') -q
+      - tox -e $(tox -l | grep py35 | xargs | sed 's/ /,/g') -p -q
     when:
       event:
         - push
@@ -36,7 +36,7 @@ steps:
       PY_COLORS: "1"
     commands:
       - pip install tox -q
-      - tox -e $(tox -l | grep py36 | xargs | sed 's/ /,/g') -q
+      - tox -e $(tox -l | grep py36 | xargs | sed 's/ /,/g') -p -q
     when:
       event:
         - push
@@ -49,7 +49,7 @@ steps:
       PY_COLORS: "1"
     commands:
       - pip install tox -q
-      - tox -e $(tox -l | grep py37 | xargs | sed 's/ /,/g') -q
+      - tox -e $(tox -l | grep py37 | xargs | sed 's/ /,/g') -p -q
     when:
       event:
         - push
diff --git a/tox.ini b/tox.ini
index 727415d..f703673 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,5 @@
 [tox]
 minversion = 3.5
-isolated_build=true
 envlist = py27-ansible{21},py{27,35,36,37}-ansible{22,23,24,25,26,27},py{27,35,36,37}-flake8
 
 [testenv]