diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index ad9f69e607..e47efc37da 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -155,7 +155,7 @@ test_expect_failure 'additional command line cc (rfc822)' '
 	git config --replace-all format.headers "Cc: R E Cipient <rcipient@example.com>" &&
 	git format-patch --cc="S. E. Cipient <scipient@example.com>" --stdout master..side | sed -e "/^\$/q" >patch5 &&
 	grep "^Cc: R E Cipient <rcipient@example.com>,\$" patch5 &&
-	grep "^ *"S. E. Cipient" <scipient@example.com>\$" patch5
+	grep "^ *\"S. E. Cipient\" <scipient@example.com>\$" patch5
 '
 
 test_expect_success 'command line headers' '
@@ -183,7 +183,7 @@ test_expect_success 'command line To: header (ascii)' '
 test_expect_failure 'command line To: header (rfc822)' '
 
 	git format-patch --to="R. E. Cipient <rcipient@example.com>" --stdout master..side | sed -e "/^\$/q" >patch8 &&
-	grep "^To: "R. E. Cipient" <rcipient@example.com>\$" patch8
+	grep "^To: \"R. E. Cipient\" <rcipient@example.com>\$" patch8
 '
 
 test_expect_failure 'command line To: header (rfc2047)' '
@@ -203,7 +203,7 @@ test_expect_failure 'configuration To: header (rfc822)' '
 
 	git config format.to "R. E. Cipient <rcipient@example.com>" &&
 	git format-patch --stdout master..side | sed -e "/^\$/q" >patch9 &&
-	grep "^To: "R. E. Cipient" <rcipient@example.com>\$" patch9
+	grep "^To: \"R. E. Cipient\" <rcipient@example.com>\$" patch9
 '
 
 test_expect_failure 'configuration To: header (rfc2047)' '