diff --git a/Jenkinsfile b/Jenkinsfile
index 68d1e9a..46903a0 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -2,6 +2,10 @@
 
 pipeline {
     agent any
+    options { disableConcurrentBuilds() }
+    environment {
+        TMPDIR = "/tmp/$BUILD_TAG"
+    }
     stages {
         stage('Unit Tests') {
             steps {
diff --git a/tox.ini b/tox.ini
index 885b8c5..dd4ab74 100644
--- a/tox.ini
+++ b/tox.ini
@@ -50,7 +50,7 @@ commands =
   py.test {env:COVERAGE:} {env:JUNIT:} {tty:--sw:} {posargs:tests/}
 
 [testenv:pylint]
-skip_install = True
+usedevelop = true
 deps =
     http://git.entrouvert.org/authentic.git/snapshot/authentic-master.tar.gz
     Django<2.3