diff --git a/src/ini_val.sh b/src/ini_val.sh
index cc57cce..1750e63 100755
--- a/src/ini_val.sh
+++ b/src/ini_val.sh
@@ -36,7 +36,7 @@ function ini_val() {
 
   # Split on . for section. However, section is optional
   IFS='.' read -r section key <<< "${sectionkey}"
-  if [ -z "${key}" ]; then
+  if [[ ! "${key}" ]]; then
     key="${section}"
     section=""
   fi
@@ -44,15 +44,15 @@ function ini_val() {
   local current
   current=$(awk -F "${delim}" "/^${key}${delim}/ {for (i=2; i<NF; i++) printf \$i \" \"; print \$NF}" "${file}")
 
-  if [ -z "${val}" ]; then
+  if [[ ! "${val}" ]]; then
     # get a value
     echo "${current}"
   else
     # set a value
-    if [ -z "${current}" ]; then
+    if [[ ! "${current}" ]]; then
       # doesn't exist yet, add
 
-      if [ -z "${section}" ]; then
+      if [[ ! "${section}" ]]; then
         # no section was given, add to bottom of file
         echo "${key}${delim}${val}" >> "${file}"
       else
@@ -70,7 +70,7 @@ function ini_val() {
   fi
 }
 
-if [ "${BASH_SOURCE[0]}" != "${0}" ]; then
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
   export -f ini_val
 else
   ini_val "${@}"
diff --git a/src/megamount.sh b/src/megamount.sh
index 6a0c853..cd68e32 100644
--- a/src/megamount.sh
+++ b/src/megamount.sh
@@ -53,13 +53,13 @@ function megamount () {
 
   (umount -lf "${target}" || umount -f "${target}") > /dev/null 2>&1 || true
   mkdir -p "${target}"
-  if [ "${proto}" = "smb://" ]; then
+  if [[ "${proto}" = "smb://" ]]; then
     mount -t cifs --verbose -o "username=${user},password=${pass},hard" "//${host}/${path}" "${target}"
-  elif [ "${proto}" = "afp://" ]; then
+  elif [[ "${proto}" = "afp://" ]]; then
     # start syslog-ng
     # afpfsd || echo "Unable to run afpfsd. Does /dev/log exist?" && exit 1
     mount_afp "${url}" "${target}"
-  elif [ "${proto}" = "nfs://" ]; then
+  elif [[ "${proto}" = "nfs://" ]]; then
     mount -t nfs --verbose -o "vers=3,nolock,soft,intr,rsize=32768,wsize=32768" "${host}:/${path}" "${target}"
   else
     echo "ERR: Unknown protocol: '${proto}'"
@@ -70,7 +70,7 @@ function megamount () {
   ls -al "${target}/"
 }
 
-if [ "${BASH_SOURCE[0]}" != "${0}" ]; then
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
   export -f megamount
 else
   megamount "${@}"
diff --git a/src/parse_url.sh b/src/parse_url.sh
index e186dc7..a2c2d80 100644
--- a/src/parse_url.sh
+++ b/src/parse_url.sh
@@ -40,26 +40,26 @@ function parse_url() {
   local port
   local path
 
-  proto="$(echo "$parse" | grep :// | sed -e's,^\(.*://\).*,\1,g')"
-  url="${parse/$proto/}"
-  userpass="$(echo "$url" | grep @ | cut -d@ -f1)"
-  user="$(echo "$userpass" | grep : | cut -d: -f1)"
-  pass="$(echo "$userpass" | grep : | cut -d: -f2)"
-  hostport="$(echo "${url/$userpass@/}" | cut -d/ -f1)"
-  host="$(echo "$hostport" | grep : | cut -d: -f1)"
-  port="$(echo "$hostport" | grep : | cut -d: -f2)"
-  path="$(echo "$url" | grep / | cut -d/ -f2-)"
+  proto="$(echo "${parse}" | grep :// | sed -e's,^\(.*://\).*,\1,g')"
+  url="${parse/${proto}/}"
+  userpass="$(echo "${url}" | grep @ | cut -d@ -f1)"
+  user="$(echo "${userpass}" | grep : | cut -d: -f1)"
+  pass="$(echo "${userpass}" | grep : | cut -d: -f2)"
+  hostport="$(echo "${url/${userpass}@/}" | cut -d/ -f1)"
+  host="$(echo "${hostport}" | grep : | cut -d: -f1)"
+  port="$(echo "${hostport}" | grep : | cut -d: -f2)"
+  path="$(echo "${url}" | grep / | cut -d/ -f2-)"
 
-  [ -z "${user}" ] && user="${userpass}"
-  [ -z "${host}" ] && host="${hostport}"
-  if [ -z "${port}" ]; then
-    [ "${proto}" = "http://" ]  && port="80"
-    [ "${proto}" = "https://" ] && port="443"
-    [ "${proto}" = "mysql://" ] && port="3306"
-    [ "${proto}" = "redis://" ] && port="6379"
+  [[ ! "${user}" ]] && user="${userpass}"
+  [[ ! "${host}" ]] && host="${hostport}"
+  if [[ ! "${port}" ]]; then
+    [[ "${proto}" = "http://" ]]  && port="80"
+    [[ "${proto}" = "https://" ]] && port="443"
+    [[ "${proto}" = "mysql://" ]] && port="3306"
+    [[ "${proto}" = "redis://" ]] && port="6379"
   fi
 
-  if [ -n "${need}" ]; then
+  if [[ "${need}" ]]; then
     echo "${!need}"
   else
     echo ""
@@ -76,7 +76,7 @@ function parse_url() {
   fi
 }
 
-if [ "${BASH_SOURCE[0]}" != "${0}" ]; then
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
   export -f parse_url
 else
   parse_url "${@}"
diff --git a/src/templater.sh b/src/templater.sh
index f2155de..b4eb59f 100755
--- a/src/templater.sh
+++ b/src/templater.sh
@@ -30,11 +30,11 @@ function templater() {
   templateSrc="${1:-}"
   templateDst="${2:-}"
 
-  if [ ! -f "${templateSrc}" ]; then
+  if [[ ! -f "${templateSrc}" ]]; then
     echo "ERROR: Template source '${templateSrc}' needs to exist"
     exit 1
   fi
-  if [ ! -n "${templateDst}" ]; then
+  if [[ ! "${templateDst}" ]]; then
     echo "ERROR: Template destination '${templateDst}' needs to be specified"
     exit 1
   fi
@@ -49,13 +49,13 @@ function templater() {
   # cat "${templateDst}"
 
   # shellcheck disable=SC2016
-  if grep '${' "${templateDst}" && [ "${ALLOW_REMAINDERS}" = "0" ]; then
+  if grep '${' "${templateDst}" && [[ "${ALLOW_REMAINDERS}" = "0" ]]; then
     echo "ERROR: Unable to replace the above template vars"
     exit 1
   fi
 }
 
-if [ "${BASH_SOURCE[0]}" != "${0}" ]; then
+if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then
   export -f templater
 else
   templater "${@}"
diff --git a/test/acceptance.sh b/test/acceptance.sh
index e7694d6..59cc586 100755
--- a/test/acceptance.sh
+++ b/test/acceptance.sh
@@ -44,7 +44,7 @@ trap cleanup_before_exit EXIT
 cmdSed=sed
 cmdTimeout=timeout
 
-if [[ "${OSTYPE}" == "darwin"* ]]; then
+if [[ "${OSTYPE}" = "darwin"* ]]; then
   cmdSed=gsed
   cmdTimeout=gtimeout
 fi
@@ -206,10 +206,11 @@ if [[ "$(command -v shellcheck)" ]]; then
 
     echo -n "    ${file}.. "
 
-    if ! shellcheck --shell=bash --external-sources "${file}" >> "${__accptstTmpDir}/shellcheck.err"; then
-      echo "✗"
-      failed="true"
-      continue
+    if ! shellcheck --shell=bash --external-sources --color=always \
+      "${file}" >> "${__accptstTmpDir}/shellcheck.err"; then
+	echo "✗"
+	failed="true"
+	continue
     fi
 
     echo "✓"
@@ -223,4 +224,34 @@ if [[ "$(command -v shellcheck)" ]]; then
   fi
 fi
 
+# poor man's style guide checking
+echo "==> b3bp style guide"
+pushd "${__root}" > /dev/null
+
+failed="false"
+
+while IFS=$'\n' read -r file; do
+  [[ "${file}" =~ ^\./node_modules/ ]] && continue
+  [[ "${file}" =~ ^\./website/\.lanyon/ ]] && continue
+
+  echo -n "    ${file}.. "
+
+  if ! "${__root}/test/style.pl" "${file}" >> "${__accptstTmpDir}/style.err"; then
+      echo "✗"
+      failed="true"
+      continue
+  fi
+
+  echo "✓"
+done <<< "$(find . -type f -iname '*.sh')"
+
+popd > /dev/null
+
+if [[ "${failed}" = "true" ]]; then
+  echo
+  cat "${__accptstTmpDir}/style.err"
+  echo
+  exit 1
+fi
+
 exit 0
diff --git a/test/style.pl b/test/style.pl
new file mode 100755
index 0000000..d8f6a16
--- /dev/null
+++ b/test/style.pl
@@ -0,0 +1,39 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+die "usage: $0 <file>\n" if (not @ARGV);
+
+my $rc = 0;
+my $file = shift;
+
+open(my $fh, '<', $file) or die "Cannot open \`$file' for read: $!\n";
+while (<$fh>) {
+  next if (/^\s*#/);
+
+  my $errors = 0;
+
+  # remove everything between single quotes
+  # this will remove too much in case of: echo "var='$var'"
+  # and thus miss an opportunity to complain later on
+  # also it mangles the input line irreversible
+  s/'[^']+'/'___'/g;
+
+  # highlight unbraced variables--
+  # unless properly backslash'ed
+  $errors += s/((?:^|[^\\]))(((\\\\)+)?\$\w)/$1\033[31m$2\033[0m/g;
+
+  # highlight single square brackets
+  $errors += s/((?:^|\s+))\[([^\[].+[^\]])\](\s*(;|&&|\|\|))/$1\033[31m\[\033[0m$2\033[31m\]\033[0m$3/g;
+
+  # highlight double equal sign
+  $errors += s/(\[\[.*)(==)(.*\]\])/$1\033[31m$2\033[0m$3/g;
+
+  next if (not $errors);
+  print "${file}[$.]: $_";
+  $rc = 1;
+}
+close($fh);
+
+exit $rc;
diff --git a/website/_scripts/inject.sh b/website/_scripts/inject.sh
index c6caf19..6566178 100755
--- a/website/_scripts/inject.sh
+++ b/website/_scripts/inject.sh
@@ -69,7 +69,7 @@ EOF
   fi
 
   # Add a "<- Back Home" link, if any
-  echo -e $backLink >> "website/${targetName}.md"
+  echo -e "${backLink}" >> "website/${targetName}.md"
 
   echo "--> written website/${targetName}.md"
 done