2>errors
'
+test_expect_success 'Invalid In-Reply-To' '
+ git send-email \
+ --from="Example <nobody@example.com>" \
+ --to=nobody@example.com \
+ --in-reply-to=" " \
+ --smtp-server="$(pwd)/fake.sendmail" \
+ $patches
+ 2>errors
+ ! grep "^In-Reply-To: < *>" msgtxt
+'
+
+test_expect_success 'Valid In-Reply-To when prompting' '
+ (echo "From Example <from@example.com>"
+ echo "To Example <to@example.com>"
+ echo ""
+ ) | env GIT_SEND_EMAIL_NOTTY=1 git send-email \
+ --smtp-server="$(pwd)/fake.sendmail" \
+ $patches 2>errors &&
+ ! grep "^In-Reply-To: < *>" msgtxt
+'
+
test_done