+test_begin_subtest "Message-Id with spaces"
+test_subtest_known_broken
+add_message '[id]="message id@example.com"' '[date]="Sat, 01 Jan 2000 12:00:00 -0000"'
+output=$(notmuch search --output=messages id:"message id@example.com")
+test_expect_equal "$output" "messageid@example.com"
+