diff --git a/tests-ng/ignore-patterns-regexp.sh b/tests-ng/ignore-patterns-regexp.sh
new file mode 100755
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--- /dev/null
+++ b/tests-ng/ignore-patterns-regexp.sh
@@ -0,0 +1,183 @@
+#!/usr/bin/env bash
+# author: deadc0de6 (https://github.com/deadc0de6)
+# Copyright (c) 2024, deadc0de6
+#
+# test ignore patterns with regexp
+# returns 1 in case of error
+# see #418
+#
+
+## start-cookie
+set -eu -o errtrace -o pipefail
+cur=$(cd "$(dirname "${0}")" && pwd)
+ddpath="${cur}/../"
+PPATH="{PYTHONPATH:-}"
+export PYTHONPATH="${ddpath}:${PPATH}"
+altbin="python3 -m dotdrop.dotdrop"
+if hash coverage 2>/dev/null; then
+  mkdir -p coverages/
+  altbin="coverage run -p --data-file coverages/coverage --source=dotdrop -m dotdrop.dotdrop"
+fi
+bin="${DT_BIN:-${altbin}}"
+# shellcheck source=tests-ng/helpers
+source "${cur}"/helpers
+echo -e "$(tput setaf 6)==> RUNNING $(basename "${BASH_SOURCE[0]}") <==$(tput sgr0)"
+## end-cookie
+
+################################################################
+# this is the test
+################################################################
+
+# the dotfile source
+tmps=$(mktemp -d --suffix='-dotdrop-tests' || mktemp -d)
+dotpath="${tmps}"/dotfiles
+mkdir -p "${dotpath}"
+#echo "dotfile source: ${tmps}"
+# the dotfile destination
+tmpd=$(mktemp -d --suffix='-dotdrop-tests' || mktemp -d)
+#echo "dotfile destination: ${tmpd}"
+
+clear_on_exit "${tmps}"
+clear_on_exit "${tmpd}"
+
+# create the config file
+cfg1="${tmps}/config1.yaml"
+cfg2="${tmps}/config2.yaml"
+cfg3="${tmps}/config3.yaml"
+
+cat > "${cfg1}" << _EOF
+config:
+  backup: true
+  create: true
+  dotpath: dotfiles
+  ignoreempty: true
+dotfiles:
+  d_adir:
+    src: adir
+    dst: ${tmpd}/adir
+    cmpignore:
+    - '!Custom Dictionary.txt'
+    - '[a-zA-Z0-9]*'
+profiles:
+  p1:
+    dotfiles:
+    - d_adir
+_EOF
+
+cat > "${cfg2}" << _EOF
+config:
+  backup: true
+  create: true
+  dotpath: dotfiles
+  ignoreempty: true
+dotfiles:
+  d_adir:
+    src: adir
+    dst: ${tmpd}/adir
+    cmpignore:
+    - '!Custom Dictionary.txt'
+    - '[a-zA-Z0-9\ ]*'
+profiles:
+  p1:
+    dotfiles:
+    - d_adir
+_EOF
+
+cat > "${cfg3}" << _EOF
+config:
+  backup: true
+  create: true
+  dotpath: dotfiles
+  ignoreempty: true
+dotfiles:
+  d_adir:
+    src: adir
+    dst: ${tmpd}/adir
+    cmpignore:
+    - "*"
+    - '!Custom Dictionary.txt'
+profiles:
+  p1:
+    dotfiles:
+    - d_adir
+_EOF
+
+# list from https://github.com/deadc0de6/dotdrop/issues/431
+mkdir -p "${dotpath}"/adir
+mkdir -p "${tmpd}"/adir
+# dotpath
+mkdir -p "${dotpath}/adir"
+echo "myfile" > "${dotpath}/adir/myfile"
+# directories
+mkdir -p "${tmpd}/adir/blob_storage"
+mkdir -p "${tmpd}/adir/Cache"
+mkdir -p "${tmpd}/adir/Code\ Cache"
+mkdir -p "${tmpd}/adir/Crashpad"
+mkdir -p "${tmpd}/adir/databases"
+mkdir -p "${tmpd}/adir/DawnCache"
+mkdir -p "${tmpd}/adir/Dictionaries"
+mkdir -p "${tmpd}/adir/GPUCache"
+mkdir -p "${tmpd}/adir/IndexedDB"
+mkdir -p "${tmpd}/adir/Local\ Storage"
+mkdir -p "${tmpd}/adir/Obsidian\ Sandbox"
+mkdir -p "${tmpd}/adir/Service\ Worker"
+mkdir -p "${tmpd}/adir/Session\ Storage"
+mkdir -p "${tmpd}/adir/shared_proto_db"
+mkdir -p "${tmpd}/adir/VideoDecodeStats"
+mkdir -p "${tmpd}/adir/WebStorage"
+touch "${tmpd}/adir/blob_storage/file"
+touch "${tmpd}/adir/Cache/file"
+touch "${tmpd}/adir/Code\ Cache/file"
+touch "${tmpd}/adir/Crashpad/file"
+touch "${tmpd}/adir/databases/file"
+touch "${tmpd}/adir/DawnCache/file"
+touch "${tmpd}/adir/Dictionaries/file"
+touch "${tmpd}/adir/GPUCache/file"
+touch "${tmpd}/adir/IndexedDB/file"
+touch "${tmpd}/adir/Local\ Storage/file"
+touch "${tmpd}/adir/Obsidian\ Sandbox/file"
+touch "${tmpd}/adir/Service\ Worker/file"
+touch "${tmpd}/adir/Session\ Storage/file"
+touch "${tmpd}/adir/shared_proto_db/file"
+touch "${tmpd}/adir/VideoDecodeStats/file"
+touch "${tmpd}/adir/WebStorage/file"
+# files
+echo 'afile' > "${tmpd}/adir/1853510a538d0a01.json"
+echo 'afile' > "${tmpd}/adir/Cookies"
+echo 'afile' > "${tmpd}/adir/Cookies-journal"
+echo 'afile' > "${tmpd}/adir/Custom\ Dictionary.txt'"
+echo 'afile' > "${tmpd}/adir/Custom\ Dictionary.txt.backup"
+echo 'afile' > "${tmpd}/adir/id"
+echo 'afile' > "${tmpd}/adir/Network\ Persistent\ State"
+echo 'afile' > "${tmpd}/adir/obsidian.json"
+echo 'afile' > "${tmpd}/adir/obsidian.log"
+echo 'afile' > "${tmpd}/adir/Preferences"
+echo 'afile' > "${tmpd}/adir/SingletonCookie"
+echo 'afile' > "${tmpd}/adir/SingletonLock"
+echo 'afile' > "${tmpd}/adir/SingletonSocket"
+echo 'afile' > "${tmpd}/adir/TransportSecurity"
+
+###################################################
+# install
+###################################################
+cd "${ddpath}" | ${bin} install -f -c "${cfg1}" -p p1 -V
+[ ! -d "${tmpd}/adir" ] && echo "install dir (cfg1) failed" && exit 1
+[ ! -e "${tmpd}/adir/myfile" ] && echo "install file (cfg1) failed" && exit 1
+
+###################################################
+# compare cfg1
+###################################################
+cd "${ddpath}" | ${bin} compare -c "${cfg1}" -p p1 -V
+
+###################################################
+# compare cfg2
+###################################################
+cd "${ddpath}" | ${bin} compare -c "${cfg2}" -p p1 -V
+
+###################################################
+# compare cfg3
+###################################################
+cd "${ddpath}" | ${bin} compare -c "${cfg3}" -p p1 -V
+
+echo "OK"
+exit 0