See if you can spot which test failed in this list by visually scanning:

/IndividualRetrieval/singleton individuals: OK
PASS: individual-retrieval
/NameDetailsInterfaceTests/test name details interface: OK
PASS: name-details-interface
/AvatarDetailsInterfaceTests/test avatar details interface: OK
PASS: avatar-details-interface
/ImDetailsInterfaceTests/test im details interface: OK
PASS: im-details-interface
/PhoneDetailsInterfaceTests/test phone details interface: OK
PASS: phone-details-interface
/EmailDetailsInterfaceTests/test email details interface: OK
PASS: email-details-interface
/UrlDetailsInterfaceTests/test url details interface: OK
PASS: url-details-interface
/FavouriteDetailsInterfaceTests/test favourite details interface: OK
PASS: favourite-details-interface
/FullnameUpdates/fullname updates: OK
PASS: fullname-updates
/AddContactTests/test adding contacts : OK
PASS: add-contact
/DefaultContactTests/test default contact: OK
PASS: default-contact
/RemoveContactTests/test removing contacts : OK
PASS: remove-contact
/NicknameUpdates/nickname updates: OK
PASS: nickname-updates
/FamilyNameUpdates/family name updates: OK
PASS: family-name-updates
/GivenNameUpdates/given name updates: OK
PASS: given-name-updates
/AdditionalNamesUpdates/additional names updates: OK
PASS: additional-names-updates
/PrefixNameUpdates/prefix name updates: OK
PASS: prefix-name-updates
/SuffixNameUpdates/suffix name updates: OK
PASS: suffix-name-updates
/WebsiteUpdates/websites updates: OK
PASS: website-updates
/FavouriteUpdates/favourite update: OK
PASS: favourite-updates
/EmailsUpdates/emails updates: Aborted
FAIL: emails-updates
/PhonesUpdates/phones updates: OK
PASS: phones-updates
/IMAddressesUpdates/im addresses updates: OK
PASS: imaddresses-updates
/RoleDetailsInterfaceTests/test role details interface: OK
PASS: role-details-interface
/BirthdayDetailsInterfaceTests/test birthday details interface: OK
PASS: birthday-details-interface
/BirthdayUpdates/birthday updates: OK
PASS: birthday-updates
/NoteDetailsInterfaceTests/test note details interface: OK
PASS: note-details-interface
/GenderDetailsInterfaceTests/test gender details interface: OK
PASS: gender-details-interface
/PostalAddressDetailsInterfaceTests/test postal address details interface: OK
PASS: postal-address-details-interface
/AvatarUpdates/avatar updates: OK
PASS: avatar-updates
/AddPersonaTests/test adding personas to Tracker : OK
PASS: add-persona
/RemovePersonaTests/test adding personas to Tracker : OK
PASS: remove-persona
/SetNicknameTests/test setting nickname : OK
PASS: set-nickname
/SetFavouriteTests/test setting favourite : OK
PASS: set-favourite
/SetPhonesTests/test setting phones : OK
PASS: set-phones
/SetEmailsTests/test setting emails : OK
PASS: set-emails
/SetAvatarTests/test setting avatar : OK
PASS: set-avatar
/SetStructuredNameTests/test setting structured name : OK
PASS: set-structured-name
/SetFullNameTests/test setting structured name : OK
PASS: set-full-name
/SetURLsTests/test setting urls : OK
PASS: set-urls
/SetIMAddressesTests/test setting im_addresses : OK
PASS: set-im-addresses
/SetPostalAddressesTests/test setting postal addresses : OK
PASS: set-postal-addresses
/SetRolesTests/test setting roles : OK
PASS: set-roles
/SetNotesTests/test setting notes : OK
PASS: set-notes
/SetBirthdayTests/test setting bithday : OK
PASS: set-birthday
/SetGenderTests/test setting gender : OK
PASS: set-gender
/LinkPersonasTests/test linking personas: OK
PASS: link-personas
/DuplicatedEmailsTests/test adding 2 personas with the same email address : OK
PASS: duplicated-emails
/DuplicatedPhonesTests/test adding 2 personas with the same phone number : OK
PASS: duplicated-phones
/LinkPersonasViaLocalIDsTests/test linking personas: OK
PASS: link-personas-via-local-ids
/MatchIMAddressesTests/test potential match by IM addresses : OK
PASS: match-im-addresses
/MatchEmailAddressesTests/test potential match with same email addresses : OK
PASS: match-email-addresses
/MatchKnownEmailsTests/test potential match with same email addresses : OK
PASS: match-known-emails
/MatchPhoneNumberTests/test potential match with phone numbers : OK
PASS: match-phone-number
/MatchNameTests/test potential match by name #1 : OK
/MatchNameTests/test potential match by name #2 : OK
/MatchNameTests/test potential match by name #3 : OK
PASS: match-name
/MatchAllTests/test potential match all : OK
PASS: match-all
/SetDuplicateEmailTests/test re-setting an existing e-mail address: OK
PASS: set-duplicate-email
/SetNullAvatarTests/test setting null avatar : OK
PASS: set-null-avatar
====================================================================
1 of 58 tests failed
Please report to https://bugzilla.gnome.org/browse.cgi?product=folks
====================================================================

This output is mostly useless:
  * it's hard to spot which tests failed
  * who cares about which tests passed? (the "PASS" and preceding lines are just noise)

We should just summarize the test results and expand upon which tests fail. Use of bold to highlight important details would be very nice, as would color (in an a11y-friendly, aesthetically-pleasing way).