diff --git a/src/cmd/ksh93/tests/pty.sh b/src/cmd/ksh93/tests/pty.sh
index db2976817..5f20714bf 100755
--- a/src/cmd/ksh93/tests/pty.sh
+++ b/src/cmd/ksh93/tests/pty.sh
@@ -42,11 +42,11 @@ Command=${0##*/}
 integer Errors=0 lineno=1
 
 [[ -d $tmp && -w $tmp ]] || { err\_exit "$LINENO" '$tmp not set; run this from shtests. Aborting.'; exit 1; }
-whence -q pty || { lineno=$LINENO; err\_exit "$LINENO" "pty command not found -- tests skipped"; exit 0; }
+whence -q pty || { err\_exit "$LINENO" "pty command not found -- tests skipped"; exit 0; }
 
 # On FreeBSD, the stty command does not appear to work correctly on a pty pseudoterminal.
 # To avoid a couple of false regressions, we have to set 'erase' and 'kill' on the real terminal.
-stty_restore=$(stty -g) || { lineno=$LINENO; err\_exit "$LINENO" "could not save terminal state -- tests skipped"; exit 0; }
+stty_restore=$(stty -g) || { err\_exit "$LINENO" "could not save terminal state -- tests skipped"; exit 0; }
 trap 'stty "$stty_restore"' EXIT  # note: on ksh, the EXIT trap is also triggered for termination due to a signal
 stty erase ^H kill ^X
 
@@ -468,19 +468,18 @@ end_disabled
 
 # err_exit #
 # Test file name completion in vi mode
-mkdir /tmp/fakehome
-tst $LINENO <<"!"
+mkdir "/tmp/fakehome_$$" && tst $LINENO <<!
 L vi mode file name completion
 
 # Completing a file name in vi mode that contains '~' and has a
 # base name the same length as the home directory's parent directory
 # shouldn't fail.
 
-w set -o vi; HOME=/tmp/fakehome; touch ~/testfile
+w set -o vi; HOME=/tmp/fakehome_$$; touch ~/testfile_$$
 w echo ~/tes\t
-u ^/tmp/fakehome/testfile\r?\n$
+u ^/tmp/fakehome_$$/testfile_$$\r?\n$
 !
-rm -r /tmp/fakehome
+rm -r "/tmp/fakehome_$$"
 
 # err_exit #
 LC_ALL=C tst $LINENO <<"!"