diff --git a/src/test/setup/radius-config/freeradius/certs/serial b/src/test/setup/radius-config/freeradius/certs/serial
new file mode 100644
index 0000000..75016ea
--- /dev/null
+++ b/src/test/setup/radius-config/freeradius/certs/serial
@@ -0,0 +1 @@
+03