diff --git a/Makefile b/Makefile
index e3c563aca..bc756af40 100644
--- a/Makefile
+++ b/Makefile
@@ -565,6 +565,10 @@ test-addons:
 	#cp $(TESTADDONS)/hledger-addon. $(TESTADDONS)/hledger-addon
 	rm -rf $(TESTADDONS)/hledger-addon
 	mkdir $(TESTADDONS)/hledger-addon
+	cp $(TESTADDONS)/hledger-addon.hs $(TESTADDONS)/hledger-addon2
+	cp $(TESTADDONS)/hledger-addon.hs $(TESTADDONS)/hledger-addon2.hs
+	cp $(TESTADDONS)/hledger-addon.hs $(TESTADDONS)/hledger-addon3.exe
+	cp $(TESTADDONS)/hledger-addon.hs $(TESTADDONS)/hledger-addon3.lhs
 	chmod +x $(TESTADDONS)/hledger-*
 
 ######################################################################
diff --git a/hledger/Hledger/Cli/Options.hs b/hledger/Hledger/Cli/Options.hs
index 47e8a2cc9..d7220f655 100644
--- a/hledger/Hledger/Cli/Options.hs
+++ b/hledger/Hledger/Cli/Options.hs
@@ -185,7 +185,9 @@ standardAddonsHelp = [
   ,("print-unique", "print only transactions with unique descriptions")
   ,("register-csv", "output a register report as CSV")
   ,("rewrite", "add specified postings to matched transaction entries")
-  ,("addon", "dummy add-on command for testing")
+  ,("addon",  "dummy add-on command for testing")
+  ,("addon2", "dummy add-on command for testing")
+  ,("addon3", "dummy add-on command for testing")
   ]
 
 -- | Get a mode's help message as a nicely wrapped string.