diff --git a/test/fixture/debug.exitcode b/test/fixture/debug.exitcode
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/test/fixture/debug.exitcode
@@ -0,0 +1 @@
+1
diff --git a/test/fixture/debug.stdio b/test/fixture/debug.stdio
new file mode 100644
index 0000000..c86a2c1
--- /dev/null
+++ b/test/fixture/debug.stdio
@@ -0,0 +1,12 @@
+B3BP:STDIO_REPLACE_DATETIMES
+{datetime} UTC [    debug] cli arg arg_f = () -> {tmpdir}/x
+{datetime} UTC [     info] You are on {os}
+{datetime} UTC [    debug] Info useful to developers for debugging the application, not useful during operations.
+{datetime} UTC [     info] Normal operational messages - may be harvested for reporting, measuring throughput, etc. - no action required.
+{datetime} UTC [   notice] Events that are unusual but not error conditions - might be summarized in an email to developers or admins to spot potential problems - no immediate action required.
+{datetime} UTC [  warning] Warning messages, not an error, but indication that an error will occur if action is not taken, e.g. file system 85% full - each item must be resolved within a given time. This is a debug message
+{datetime} UTC [    error] Non-urgent failures, these should be relayed to developers or admins; each item must be resolved within a given time.
+{datetime} UTC [ critical] Should be corrected immediately, but indicates failure in a primary system, an example is a loss of a backup ISP connection.
+{datetime} UTC [    alert] Should be corrected immediately, therefore notify staff who can fix the problem. An example would be the loss of a primary ISP connection.
+{datetime} UTC [emergency] A "panic" condition usually affecting multiple apps/servers/sites. At this level it would usually notify all tech staff on call.
+{datetime} UTC [     info] Cleaning up. Done
diff --git a/test/scenario/debug/run.sh b/test/scenario/debug/run.sh
new file mode 100644
index 0000000..2784df0
--- /dev/null
+++ b/test/scenario/debug/run.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -o pipefail
+set -o errexit
+set -o nounset
+# set -o xtrace
+
+# Set magic variables for current FILE & DIR
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
+__base="$(basename ${__file} .sh)"
+__root="$(cd "$(dirname $(dirname $(dirname "${__dir}")))" && pwd)"
+
+echo "B3BP:STDIO_REPLACE_DATETIMES"
+
+env LOG_LEVEL=8 bash "${__root}/main.sh" -f /tmp/x