Index: modules/struct/sets.test
==================================================================
--- modules/struct/sets.test
+++ modules/struct/sets.test
@@ -84,11 +84,16 @@
 		    return [tcltest::wrongNumArgs {::struct::set} {cmd ?arg ...?} 0]
 		}
 	    }
 	}
 	tcl {
-	    if {[package vsatisfies [package present Tcl] 8.5]} {
+	    if {[package vsatisfies [package present Tcl] 8.6]} {
+		# In 8.6 head Tcl again reports what the alias resolved to
+		proc Nothing {} {
+		    return [tcltest::wrongNumArgs {::struct::set} {cmd args} 0]
+		}
+	    } elseif {[package vsatisfies [package present Tcl] 8.5]} {
 		# In 8.5 head the alias itself is reported, not what it
 		# resolved to.
 		proc Nothing {} {
 		    return [tcltest::wrongNumArgs setop {cmd args} 0]
 		}