diff --git a/tests/test-patchbomb b/tests/test-patchbomb
--- a/tests/test-patchbomb
+++ b/tests/test-patchbomb
@@ -39,32 +39,32 @@ a multiline
 description
 EOF
 
-echo % test bundle and description
+echo "% test bundle and description"
 hg email --date '1970-1-1 0:3' -n -f quux -t foo \
     -c bar -s test -r tip -b --desc description | \
     fixheaders
 
-echo % utf-8 patch
+echo "% utf-8 patch"
 python -c 'fp = open("utf", "wb"); fp.write("h\xC3\xB6mma!\n"); fp.close();'
 hg commit -A -d '4 0' -m 'charset=utf-8; content-transfer-encoding: base64'
 
-echo % no mime encoding for email --test
+echo "% no mime encoding for email --test"
 hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -n | fixheaders > mailtest
-echo % md5sum of 8-bit output
+echo "% md5sum of 8-bit output"
 $TESTDIR/md5sum.py mailtest
 rm mailtest
 
-echo % mime encoded mbox
+echo "% mime encoded mbox"
 hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -m mbox
 cat mbox | fixheaders
 rm mbox
 
-echo % iso-8859-1 patch
+echo "% iso-8859-1 patch"
 python -c 'fp = open("isolatin", "wb"); fp.write("h\xF6mma!\n"); fp.close();'
 hg commit -A -d '5 0' -m 'charset=us-ascii; content-transfer-encoding: 8bit'
 
-echo % fake ascii mbox
+echo "% fake ascii mbox"
 hg email --date '1970-1-1 0:5' -f quux -t foo -c bar -r tip -m mbox
 fixheaders < mbox > mboxfix
-echo % md5sum of 8-bit output
+echo "% md5sum of 8-bit output"
 $TESTDIR/md5sum.py mboxfix