diff --git a/jenkins/acceptance.sh b/jenkins/acceptance.sh
index 52a29bcdd5..8bcaa209ff 100755
--- a/jenkins/acceptance.sh
+++ b/jenkins/acceptance.sh
@@ -54,6 +54,13 @@ git fetch origin master:refs/remotes/origin/master
 # Bootstrap Ruby requirements so we can run the tests
 bundle install
 
+# Reset the jenkins worker's virtualenv back to the
+# state it was in when the instance was spun up.
+if [ -e $HOME/edx-venv_clean.tar.gz ]; then
+    rm -rf $HOME/edx-venv
+    tar -C $HOME -xf $HOME/edx-venv_clean.tar.gz
+fi
+
 # Activate the Python virtualenv
 source $HOME/edx-venv/bin/activate
 
diff --git a/jenkins/all-tests.sh b/jenkins/all-tests.sh
index b4706229f4..7d0bf8720c 100755
--- a/jenkins/all-tests.sh
+++ b/jenkins/all-tests.sh
@@ -62,6 +62,13 @@ git fetch origin master:refs/remotes/origin/master
 # Bootstrap Ruby requirements so we can run the tests
 bundle install
 
+# Reset the jenkins worker's virtualenv back to the
+# state it was in when the instance was spun up.
+if [ -e $HOME/edx-venv_clean.tar.gz ]; then
+    rm -rf $HOME/edx-venv
+    tar -C $HOME -xf $HOME/edx-venv_clean.tar.gz
+fi
+
 # Activate the Python virtualenv
 source $HOME/edx-venv/bin/activate