diff --git a/ksh.spec b/ksh.spec
index 6117a1d..ea93a1a 100644
--- a/ksh.spec
+++ b/ksh.spec
@@ -544,6 +544,12 @@ fi
       unset ${!LESS*}
       grep -E '^(model name|flags)[[:blank:]]*:' /proc/cpuinfo | sort -ur
       ${SHELL} shtests
+      result=$(${SHELL} -k -c 'd=`/bin/echo x y=z`; echo $d x y=z')
+      test "$result" = 'x x' || exit 1
+      result=$(${SHELL} -c 'echo | echo "x`/bin/echo y`"')
+      test "$result" = xy || exit 1
+      result=$(${SHELL} -c 'echo | echo "x$(/bin/echo y)"')
+      test "$result" = xy || exit 1
       exec 3> ${TMPDIR:-/tmp}/log
       LANG=POSIX
       strace $MEMORY -o '!%{S:31}' ${SHELL} %{S:10} 400