diff --git a/tf-psa-crypto/programs/demo_common.sh b/tf-psa-crypto/programs/demo_common.sh
deleted file mode 100644
index d8fcda5..0000000
--- a/tf-psa-crypto/programs/demo_common.sh
+++ /dev/null
@@ -1,137 +0,0 @@
-## Common shell functions used by demo scripts programs/*/*.sh.
-
-## How to write a demo script
-## ==========================
-##
-## Include this file near the top of each demo script:
-##   . "${0%/*}/../demo_common.sh"
-##
-## Start with a "msg" call that explains the purpose of the script.
-## Then call the "depends_on" function to ensure that all config
-## dependencies are met.
-##
-## As the last thing in the script, call the cleanup function.
-##
-## You can use the functions and variables described below.
-
-set -e -u
-
-## $root_dir is the root directory of the Mbed TLS source tree.
-root_dir="${0%/*}"
-# Find a nice path to the root directory, avoiding unnecessary "../".
-# The code supports demo scripts nested up to 4 levels deep.
-# The code works no matter where the demo script is relative to the current
-# directory, even if it is called with a relative path.
-n=4 # limit the search depth
-while ! [ -d "$root_dir/programs" ] || ! [ -d "$root_dir/library" ]; do
-  if [ $n -eq 0 ]; then
-    echo >&2 "This doesn't seem to be an Mbed TLS source tree."
-    exit 125
-  fi
-  n=$((n - 1))
-  case $root_dir in
-    .) root_dir="..";;
-    ..|?*/..) root_dir="$root_dir/..";;
-    ?*/*) root_dir="${root_dir%/*}";;
-    /*) root_dir="/";;
-    *) root_dir=".";;
-  esac
-done
-
-## $programs_dir is the directory containing the sample programs.
-# Assume an in-tree build.
-programs_dir="$root_dir/programs"
-
-## msg LINE...
-## msg <TEXT_ORIGIN
-## Display an informational message.
-msg () {
-  if [ $# -eq 0 ]; then
-    sed 's/^/# /'
-  else
-    for x in "$@"; do
-      echo "# $x"
-    done
-  fi
-}
-
-## run "Message" COMMAND ARGUMENT...
-## Display the message, then run COMMAND with the specified arguments.
-run () {
-    echo
-    echo "# $1"
-    shift
-    echo "+ $*"
-    "$@"
-}
-
-## Like '!', but stop on failure with 'set -e'
-not () {
-  if "$@"; then false; fi
-}
-
-## run_bad "Message" COMMAND ARGUMENT...
-## Like run, but the command is expected to fail.
-run_bad () {
-  echo
-  echo "$1 This must fail."
-  shift
-  echo "+ ! $*"
-  not "$@"
-}
-
-## config_has SYMBOL...
-## Succeeds if the library configuration has all SYMBOLs set.
-config_has () {
-  for x in "$@"; do
-    "$programs_dir/test/query_compile_time_config" "$x"
-  done
-}
-
-## depends_on SYMBOL...
-## Exit if the library configuration does not have all SYMBOLs set.
-depends_on () {
-  m=
-  for x in "$@"; do
-    if ! config_has "$x"; then
-      m="$m $x"
-    fi
-  done
-  if [ -n "$m" ]; then
-    cat >&2 <<EOF
-$0: this demo requires the following
-configuration options to be enabled at compile time:
- $m
-EOF
-    # Exit with a success status so that this counts as a pass for run_demos.py.
-    exit
-  fi
-}
-
-## Add the names of files to clean up to this whitespace-separated variable.
-## The file names must not contain whitespace characters.
-files_to_clean=
-
-## Call this function at the end of each script.
-## It is called automatically if the script is killed by a signal.
-cleanup () {
-  rm -f -- $files_to_clean
-}
-
-
-
-################################################################
-## End of the public interfaces. Code beyond this point is not
-## meant to be called directly from a demo script.
-
-trap 'cleanup; trap - HUP; kill -HUP $$' HUP
-trap 'cleanup; trap - INT; kill -INT $$' INT
-trap 'cleanup; trap - TERM; kill -TERM $$' TERM
-
-if config_has MBEDTLS_ENTROPY_NV_SEED; then
-  # Create a seedfile that's sufficiently long in all library configurations.
-  # This is necessary for programs that use randomness.
-  # Assume that the name of the seedfile is the default name.
-  files_to_clean="$files_to_clean seedfile"
-  dd if=/dev/urandom of=seedfile ibs=64 obs=64 count=1
-fi
diff --git a/tf-psa-crypto/programs/psa/key_ladder_demo.sh b/tf-psa-crypto/programs/psa/key_ladder_demo.sh
index e55da7e..526fde5 100755
--- a/tf-psa-crypto/programs/psa/key_ladder_demo.sh
+++ b/tf-psa-crypto/programs/psa/key_ladder_demo.sh
@@ -3,7 +3,7 @@
 # Copyright The Mbed TLS Contributors
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 
-. "${0%/*}/../demo_common.sh"
+. "${0%/*}/../../../programs/demo_common.sh"
 
 msg <<'EOF'
 This script demonstrates the use of the PSA cryptography interface to
diff --git a/tf-psa-crypto/programs/psa/psa_hash_demo.sh b/tf-psa-crypto/programs/psa/psa_hash_demo.sh
index a26697c..5e257d7 100755
--- a/tf-psa-crypto/programs/psa/psa_hash_demo.sh
+++ b/tf-psa-crypto/programs/psa/psa_hash_demo.sh
@@ -3,7 +3,7 @@
 # Copyright The Mbed TLS Contributors
 # SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 
-. "${0%/*}/../demo_common.sh"
+. "${0%/*}/../../../programs/demo_common.sh"
 
 msg <<'EOF'
 This program demonstrates the use of the PSA cryptography interface to