===== 5.6.20 (2016-03-31)

$ grep -r 'Tests failed' /var/lib/mock/56*/build.log

/var/lib/mock/el5i/build.log:Tests failed    :    8
/var/lib/mock/el5x/build.log:Tests failed    :    7
/var/lib/mock/el6i/build.log:Tests failed    :    6
/var/lib/mock/el6x/build.log:Tests failed    :    5
/var/lib/mock/el7x/build.log:Tests failed    :    5
/var/lib/mock/fc21i/build.log:Tests failed    :    2
/var/lib/mock/fc21x/build.log:Tests failed    :    0
/var/lib/mock/fc22i/build.log:Tests failed    :    2
/var/lib/mock/fc22x/build.log:Tests failed    :    0
/var/lib/mock/fc23i/build.log:Tests failed    :    2
/var/lib/mock/fc23x/build.log:Tests failed    :    0
/var/lib/mock/fc24i/build.log:Tests failed    :    2
/var/lib/mock/fc24x/build.log:Tests failed    :    0


el5i, el5x
    openssl_x509_parse() basic test for OpenSSL 0.9 [ext/openssl/tests/openssl_x509_parse_basic_v9.phpt]
    sni_server [ext/openssl/tests/sni_server.phpt]
el5i, el6i, fc21i, fc22i, fc23i, fc24i
    Bug #64146 (serialize incorrectly saving objects when they are cloned) [ext/standard/tests/serialize/bug64146.phpt]
    Bug #53437 DateInterval unserialize bad data, 32 bit [ext/date/tests/bug53437_var3.phpt]
el5x, el6x, el7x
    strtotime() function (64 bit) [ext/date/tests/strtotime3-64bit.phpt]
el5i, el5x, el6i, el6x, el7x
    Bug #33414 [2] (Comprehensive list of incorrect days returned after strotime() / date() tests) [ext/date/tests/bug33414-2.phpt]
    Test date_sunrise() function : usage variation -  Passing high positive and negative float values to time argument. [ext/date/tests/date_sunrise_variation9.phpt]
    Test date_sunset() function : usage variation - Passing high positive and negative float values to time argument. [ext/date/tests/date_sunset_variation9.phpt]
    Test getdate() function : usage variation - Passing high positive and negative float values to timestamp. [ext/date/tests/getdate_variation7.phpt]


[1] #64146 known issue, no fix found
[2] proc_open erratic results...