diff --git a/tests/ansible/debug_run_ansible_playbook.sh b/tests/ansible/debug_run_ansible_playbook.sh
new file mode 100755
index 00000000..ab2c9385
--- /dev/null
+++ b/tests/ansible/debug_run_ansible_playbook.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+# Wrap ansible-playbook, setting up some test of the test environment.
+
+# Used by delegate_to.yml to ensure "sudo -E" preserves environment.
+export I_WAS_PRESERVED=1
+export MITOGEN_MAX_INTERPRETERS=3
+
+if [ "${ANSIBLE_STRATEGY:0:7}" = "mitogen" ]
+then
+    EXTRA='{"is_mitogen": true}'
+else
+    EXTRA='{"is_mitogen": false}'
+fi
+
+exec ~/src/cpython/venv/bin/ansible-playbook -e "$EXTRA" -e ansible_python_interpreter=/Users/dmw/src/cpython/venv/bin/python2.7 "$@"