diff --git a/tests/command-line.test b/tests/command-line.test
index 7feb75602..3a412bfd4 100644
--- a/tests/command-line.test
+++ b/tests/command-line.test
@@ -131,8 +131,20 @@ hledgerdev register -f/dev/null --alias=somealiases --rules-file -? -h --help --
 >>> /^register \[OPTIONS\]/
 >>>=0
 
-# 14. flags after and add-command are handled by the add-on
-# needs updating
-#hledgerdev accountnames.hs --help
-#>>> /^assets$/
-#>>>=0
+# do "make addons" to set up for these:
+
+# 14. flags after an add-command are handled by the add-on
+hledgerdev addon --help
+>>> /args: --help/
+>>>=0
+
+# 15. add-on flags which are not also defined in the main executable are a problem
+hledgerdev addon --addonflag
+>>>2 /Unknown flag: --addonflag/
+>>>=1
+
+# 16. hledger main executable ignores anything after -- (and hides the -- from the add-on)
+hledgerdev addon --help -- --addonflag
+>>> /args: --help --addonflag/
+>>>=0
+