Index: tests/parameters.test
===================================================================
diff -u -rdf4493971c95da9eba468c207ac8891f9c9d14c4 -r2e7f0b2256363d70c78778c9ed401f9450622a6a
--- tests/parameters.test	(.../parameters.test)	(revision df4493971c95da9eba468c207ac8891f9c9d14c4)
+++ tests/parameters.test	(.../parameters.test)	(revision 2e7f0b2256363d70c78778c9ed401f9450622a6a)
@@ -26,6 +26,8 @@
 
   ? {::nsf::method::alias C foo ::set 1} \
       {Invalid argument '1', maybe too many arguments; should be "::nsf::method::alias object ?-per-object? methodName ?-frame method|object|default? cmdName"}
+
+  ? {C eval {:attribute x -class D}} {Invalid argument 'D', maybe too many arguments; should be "::C attribute ?-class value? ?-incremental? spec ?initblock?"} "Test whether the colon prefix is suppressed"
 }
 
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