diff --git a/goodwe_controller/test_ci01_probe.py b/goodwe_controller/test_ci01_probe.py
new file mode 100644
index 0000000..f5d7dbe
--- /dev/null
+++ b/goodwe_controller/test_ci01_probe.py
@@ -0,0 +1,7 @@
+"""CI-01 THROWAWAY - delete this branch.
+
+Exists to make `checks / unit` go RED so a merge can be OBSERVED being refused.
+"""
+import sys
+print("ci01 refusal probe: failing on purpose")
+sys.exit(1)