diff --git a/data/pkgconfig.sh b/data/pkgconfig.sh
index 0dba39f..61a50f6 100755
--- a/data/pkgconfig.sh
+++ b/data/pkgconfig.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #$Id$
-#Copyright (c) 2011-2019 Pierre Pronchery <khorben@defora.org>
+#Copyright (c) 2011-2020 Pierre Pronchery <khorben@defora.org>
 #
 #Redistribution and use in source and binary forms, with or without
 #modification, are permitted provided that the following conditions are met:
@@ -27,14 +27,15 @@
 #variables
 CONFIGSH="${0%/pkgconfig.sh}/../config.sh"
 PREFIX="/usr/local"
-DEBUG="_debug"
 DEVNULL="/dev/null"
 PROGNAME="pkgconfig.sh"
 #executables
+DEBUG="_debug"
 INSTALL="install -m 0644"
 MKDIR="mkdir -m 0755 -p"
 RM="rm -f"
 SED="sed"
+
 [ -f "$CONFIGSH" ] && . "$CONFIGSH"
 
 
diff --git a/tests/clint.sh b/tests/clint.sh
index 1bf833f..a7d22ba 100755
--- a/tests/clint.sh
+++ b/tests/clint.sh
@@ -25,6 +25,7 @@
 
 
 #variables
+CONFIGSH="${0%/clint.sh}/../config.sh"
 CFLAGS=
 CPPFLAGS=
 PROGNAME="clint.sh"
@@ -39,6 +40,8 @@ MKDIR="mkdir -p"
 SORT="sort -n"
 TR="tr"
 
+[ -f "$CONFIGSH" ] && . "$CONFIGSH"
+
 
 #functions
 #clint
diff --git a/tests/fixme.sh b/tests/fixme.sh
index 1db1787..84319cf 100755
--- a/tests/fixme.sh
+++ b/tests/fixme.sh
@@ -25,17 +25,23 @@
 
 
 #variables
+CONFIGSH="${0%/fixme.sh}/../config.sh"
 PROGNAME="fixme.sh"
 PROJECTCONF="../project.conf"
+REGEXP_ERROR="FIXME"
+REGEXP_WARNING="\\(TODO\|XXX\\)"
 #executables
 DATE="date"
 DEBUG="_debug"
 FIND="find"
 GREP="grep"
+HEAD="head"
 MKDIR="mkdir -p"
 SORT="sort -n"
 TR="tr"
 
+[ -f "$CONFIGSH" ] && . "$CONFIGSH"
+
 
 #functions
 #fixme
@@ -64,24 +70,7 @@ _fixme()
 	for subdir in $subdirs; do
 		[ -d "../$subdir" ] || continue
 		for filename in $($FIND "../$subdir" -type f | $SORT); do
-			callback=
-			ext=${filename##*/}
-			ext=${ext%.in}
-			ext=${ext##*.}
-			case "$ext" in
-				asm|S)
-					callback="_fixme_asm"
-					;;
-				c|cc|cpp|cxx|h|js)
-					callback="_fixme_c"
-					;;
-				conf|sh)
-					callback="_fixme_sh"
-					;;
-				htm|html|xml)
-					callback="_fixme_xml"
-					;;
-			esac
+			callback=$(_fixme_callback "$filename")
 			[ -n "$callback" ] || continue
 			($callback "$filename") 2>&1
 			if [ $? -ne 0 ]; then
@@ -93,54 +82,114 @@ _fixme()
 	return $res
 }
 
-_fixme_asm()
+_fixme_callback()
+{
+	filename="$1"
+	ext=${filename##*/}
+	ext=${ext%.in}
+	ext=${ext##*.}
+	callback=
+
+	case "$ext" in
+		asm|S)
+			echo "_fixme_callback_asm"
+			return 0
+			;;
+		c|cc|cpp|cxx|h|js|v)
+			echo "_fixme_callback_c"
+			return 0
+			;;
+		conf|sh)
+			echo "_fixme_callback_sh"
+			return 0
+			;;
+		py)
+			echo "_fixme_callback_python"
+			return 0
+			;;
+		htm|html|xml|xsl)
+			echo "_fixme_callback_xml"
+			return 0
+			;;
+	esac
+	case $($HEAD -n 1 "$filename") in
+		"#!/bin/sh"*|"#! /bin/sh"*|\
+		"#!/usr/bin/env bash"*|"#! /usr/bin/env bash"*)
+			echo "_fixme_callback_sh"
+			return 0
+			;;
+		"#!/usr/bin/env python"*|"#! /usr/bin/env python"*)
+			echo "_fixme_callback_python"
+			return 0
+			;;
+		"<html"*|"<?xml"*)
+			echo "_fixme_callback_xml"
+			return 0
+			;;
+	esac
+	return 2
+}
+
+_fixme_callback_asm()
 {
 	res=0
 	filename="$1"
 
 	#warnings
-	$GREP -nH '/\*.*\(TODO\|XXX\)' "$filename"
+	$GREP -nH "/\\*.*$REGEXP_WARNING" "$filename"
 	#failures
-	$GREP -nH '/\*.*FIXME' "$filename" && res=2
+	$GREP -nH "/\\*.*$REGEXP_ERROR" "$filename" && res=2
 	return $res
 }
 
-_fixme_c()
+_fixme_callback_c()
 {
 	res=0
 	filename="$1"
 
 	#warnings
-	$GREP -nH '/\(/\|\*\).*\(TODO\|XXX\)' "$filename"
+	$GREP -nH "/\\(/\\|\\*\\).*$REGEXP_WARNING" "$filename"
 	#failures
-	$GREP -nH '/\(/\|\*\).*FIXME' "$filename" && res=2
+	$GREP -nH "/\\(/\\|\\*\\).*$REGEXP_ERROR" "$filename" && res=2
 	return $res
 }
 
-_fixme_sh()
+_fixme_callback_python()
 {
 	res=0
 	filename="$1"
-	#XXX avoid matching the regexp
 	comment="#"
 
 	#warnings
-	$GREP -nH "$comment.*\\(TODO\\|XXX\\)" "$filename"
+	$GREP -nH "$comment.*$REGEXP_WARNING" "$filename"
 	#failures
-	$GREP -nH "$comment.*FIXME" "$filename" && res=2
+	$GREP -nH "$comment.*$REGEXP_ERROR" "$filename" && res=2
 	return $res
 }
 
-_fixme_xml()
+_fixme_callback_sh()
+{
+	res=0
+	filename="$1"
+	comment="#"
+
+	#warnings
+	$GREP -nH "$comment.*$REGEXP_WARNING" "$filename"
+	#failures
+	$GREP -nH "$comment.*$REGEXP_ERROR" "$filename" && res=2
+	return $res
+}
+
+_fixme_callback_xml()
 {
 	res=0
 	filename="$1"
 
 	#XXX limited to a single line
 	#warnings
-	$GREP -nH '<!--.*\(TODO\|XXX\)' "$filename"
+	$GREP -nH "<!--.*$REGEXP_WARNING" "$filename"
 	#failures
-	$GREP -nH '<!--.*FIXME' "$filename" && res=2
+	$GREP -nH "<!--.*$REGEXP_ERROR" "$filename" && res=2
 	return $res
 }