diff --git a/src/kripketest/bad_parsing.test b/src/kripketest/bad_parsing.test
index 1e5ca5541..490e75203 100755
--- a/src/kripketest/bad_parsing.test
+++ b/src/kripketest/bad_parsing.test
@@ -68,8 +68,7 @@ cat output | grep -v + > res
 diff expected res
 
 # The diagnostic should be the same with DOS return lines
-sed 's/$/\r/' input > input.dos
-mv input.dos input
+perl -pi -e 's/$/\r/' input
 run 1 ../parse_print input 2> output
 cat output | grep -v + > res
 diff expected res
diff --git a/src/tgbatest/hoaparse.test b/src/tgbatest/hoaparse.test
index f25e26d1b..958227236 100755
--- a/src/tgbatest/hoaparse.test
+++ b/src/tgbatest/hoaparse.test
@@ -453,8 +453,7 @@ input:8.1-16.12: aborted input automaton
 EOF
 
 # DOS-style new lines should have the same output.
-sed 's/$/\r/g' input > input.dos
-mv input.dos input
+perl -pi -e 's/$/\r/' input
 ../../bin/autfilt --hoa input 2>stderr && exit 1
 cat stderr
 diff stderr input.exp
@@ -669,8 +668,7 @@ EOF
 diff expected input.out
 
 # DOS-style new lines should have the same output.
-sed 's/$/\r/g' input > input.dos
-mv input.dos input
+perl -pe -e 's/$/\r/' input
 ../../bin/autfilt --hoa input 2>stderr && exit 1
 cat stderr
 diff stderr input.exp
diff --git a/src/tgbatest/neverclaimread.test b/src/tgbatest/neverclaimread.test
index 408bb28ef..189855a4c 100755
--- a/src/tgbatest/neverclaimread.test
+++ b/src/tgbatest/neverclaimread.test
@@ -293,8 +293,7 @@ grep input: stderr > stderrfilt
 diff stderrfilt expected-err
 
 # DOS-style new lines should have the same output.
-sed 's/$/\r/g' input > input.dos
-mv input.dos input
+perl -pi -e 's/$/\r/' input
 run 2 ../ltl2tgba -ks -XN input > stdout 2>stderr
 cat stderr
 grep input: stderr > stderrfilt
diff --git a/src/tgbatest/readsave.test b/src/tgbatest/readsave.test
index 16615cf66..14311b65e 100755
--- a/src/tgbatest/readsave.test
+++ b/src/tgbatest/readsave.test
@@ -3,7 +3,7 @@
 # Copyright (C) 2009, 2010, 2012, 2014 Laboratoire de Recherche et
 # Développement de l'Epita (LRDE).
 # Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
-# département Systèmes Répartis Coopératifs (SRC), Université Pierre
+# département Systèmes Répartis Coopératifs (SRC), Université Pierre
 # et Marie Curie.
 #
 # This file is part of Spot, a model checking library.
@@ -123,8 +123,7 @@ EOF
 diff stderrfilt expected
 
 # The diagnostic should be the same with DOS input
-sed 's/$/\r/' input > input.dos
-mv input.dos input
+perl -pi -e 's/$/\r/' input
 run 2 ../ltl2tgba -b -X input > stdout 2>stderr
 cat stderr
 grep input: stderr > stderrfilt