diff --git a/tests/ca/cert-selfsigned.sh b/tests/ca/cert-selfsigned.sh
old mode 100644
new mode 100755
index d3428d2..4ce2266
--- a/tests/ca/cert-selfsigned.sh
+++ b/tests/ca/cert-selfsigned.sh
@@ -1,4 +1,4 @@
-#!/binsh
+#!/bin/sh
 
 # create new key and cert request
 openssl req -new -out ssl.req -subj "/callSign=TESTING/CN=Testing" -newkey rsa:4096 -days 3650 -nodes -config openssl.conf