Index: tests/shells.test
===================================================================
diff -u -rce511c8758667fdbbd5a18edd7556b8e5f043f39 -r1d2bdbea2141f159f982e8dde0f9b0a6778a8b71
--- tests/shells.test	(.../shells.test)	(revision ce511c8758667fdbbd5a18edd7556b8e5f043f39)
+++ tests/shells.test	(.../shells.test)	(revision 1d2bdbea2141f159f982e8dde0f9b0a6778a8b71)
@@ -6,8 +6,22 @@
 ## for now, we do not have scripted shells for Windows environments
 ## without a bash-like shell, so ...
 
-if {$tcl_platform(platform) eq "windows"} return;
+if {$tcl_platform(platform) eq "windows"} {
+  return
+}
 
+#
+# When the compiler flags modify the console output, come of the shell
+# tests below will fail. One should introduce more detailed test
+# conditions like in tcl-test to deal with the more precisely. For the
+# time being, we skip here the full test when nsf was compiled with
+# memcount activated.
+#
+if {$::nsf::config(memcount) == 1} {
+  return
+}
+
+
 nx::test case nxsh {
   set rootDir [file join {*}[lrange [file split [file normalize [info script]]] 0 end-2]]
   set nxsh [file join $rootDir nxsh]
@@ -73,7 +87,7 @@
   ? [list exec $nxsh -c << "catch {nx::Object eval {exit 1}}"] "child process exited abnormally"
 
   # just 8.6 or newer
-  if {[info command try] eq ""} return
+  if {[info command yield] eq ""} return
   ? [list exec $nxsh -c << [list nx::Object eval {try { exit 6 } \
                                                       on break {} {;} \
                                                       on return {} {;} \