diff --git a/modules/jenkins/files/slave_scripts/run-tox.sh b/modules/jenkins/files/slave_scripts/run-tox.sh
index 0349dc1fce..4bbfc2c39b 100755
--- a/modules/jenkins/files/slave_scripts/run-tox.sh
+++ b/modules/jenkins/files/slave_scripts/run-tox.sh
@@ -32,7 +32,7 @@ trap "rm -rf $TMPDIR" EXIT
 
 sudo /usr/local/jenkins/slave_scripts/jenkins-sudo-grep.sh pre
 
-$PYTHON `which tox` -e$venv
+tox -e$venv
 result=$?
 
 echo "Begin pip freeze output from test virtualenv:"
diff --git a/modules/openstack_project/files/jenkins_job_builder/config/macros.yaml b/modules/openstack_project/files/jenkins_job_builder/config/macros.yaml
index f6d2b4f5ad..565def805b 100644
--- a/modules/openstack_project/files/jenkins_job_builder/config/macros.yaml
+++ b/modules/openstack_project/files/jenkins_job_builder/config/macros.yaml
@@ -79,22 +79,22 @@
 - builder:
     name: python26
     builders:
-      - shell: "PYTHON=python2.6 /usr/local/jenkins/slave_scripts/run-tox.sh 26 {github-org} {project}"
+      - shell: "/usr/local/jenkins/slave_scripts/run-tox.sh 26 {github-org} {project}"
 
 - builder:
     name: python27
     builders:
-      - shell: "PYTHON=python2.7 /usr/local/jenkins/slave_scripts/run-tox.sh 27 {github-org} {project}"
+      - shell: "/usr/local/jenkins/slave_scripts/run-tox.sh 27 {github-org} {project}"
 
 - builder:
     name: python26-folsom
     builders:
-      - shell: "PYTHON=python2.6 /usr/local/jenkins/slave_scripts/run-tox.sh 26-folsom {github-org} {project}"
+      - shell: "/usr/local/jenkins/slave_scripts/run-tox.sh 26-folsom {github-org} {project}"
 
 - builder:
     name: python27-folsom
     builders:
-      - shell: "PYTHON=python2.7 /usr/local/jenkins/slave_scripts/run-tox.sh 27-folsom {github-org} {project}"
+      - shell: "/usr/local/jenkins/slave_scripts/run-tox.sh 27-folsom {github-org} {project}"
 
 - builder:
     name: assert-no-extra-files