rhcert-backend can not test internal audio. 
There are two audio device on the laptop, internal audio and DP/HDMI audio. when run the audio test with command "rhcert-backend run --test=audio", the test suite run on DP/HDMI audio twice and get "PASS", but not run on the internal at all. 
If remove the DP/HDMI monitor and test again, it will test on card0(DP/HDMI audio) twice with command "aplay /usr/share/sounds/alsa/Front_Right.wav -D plughw:0" and get "FAIL".

audio device in the test plan:
audio      udi=/devices/pci0000:00/0000:00:03.0/sound/card0 
audio      udi=/devices/pci0000:00/0000:00:1b.0/sound/card1 

run time log:
...
Running audio on udi=/devices/pci0000:00/0000:00:03.0/sound/card0 testserver=rhcert71 

Sound Card:

udev device: /devices/pci0000:00/0000:00:03.0/sound/card0
------------------------------------------------------
ID_VENDOR_ID 0x8086
SUBSYSTEM sound
ID_VENDOR_FROM_DATABASE Intel Corporation
DEVPATH /devices/pci0000:00/0000:00:03.0/sound/card0
ID_PATH_TAG pci-0000_00_03_0
ID_MODEL_FROM_DATABASE Broadwell-U Audio Controller
ID_PCI_SUBCLASS_FROM_DATABASE Audio device
TAGS :seat:systemd:
SYSTEMD_WANTS sound.target
ID_PATH pci-0000:00:03.0
ID_FOR_SEAT sound-pci-0000_00_03_0
SOUND_INITIALIZED 1
ID_PCI_CLASS_FROM_DATABASE Multimedia controller
info.udi /devices/pci0000:00/0000:00:03.0/sound/card0
USEC_INITIALIZED 21418
ID_MODEL_ID 0x160c
PULSE_PROFILE_SET extra-hdmi.conf
SOUND_FORM_FACTOR internal
ID_BUS pci


/proc/asound/card0/pcm8p/info
card: 0
device: 8
subdevice: 0
stream: PLAYBACK
id: HDMI 2
name: HDMI 2
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

/proc/asound/card0/pcm7p/info
card: 0
device: 7
subdevice: 0
stream: PLAYBACK
id: HDMI 1
name: HDMI 1
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

/proc/asound/card0/pcm3p/info
card: 0
device: 3
subdevice: 0
stream: PLAYBACK
id: HDMI 0
name: HDMI 0
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

This test plays a sound sample and records it to another file.
                    Please use the Volume Control application and insure that the 
                    Capture settings will record the sound. Continue? (yes|no) y
response: y
response: True
Note: No Capture Support
aplay /usr/share/sounds/alsa/Front_Right.wav -D plughw:0,3
Playing WAVE '/usr/share/sounds/alsa/Front_Right.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
aplay /usr/share/sounds/alsa/Front_Left.wav -D plughw:0,3
Playing WAVE '/usr/share/sounds/alsa/Front_Left.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
Did you hear the played sound? (yes|no) y
response: y
response: True
copying attachments...
checking directory /var/log/rhcert/runs/1/hwcert/audio 
Skipping output.log
saveOutput: /var/log/rhcert/runs/1/hwcert/audio/output.log
Return value was True
Running audio on udi=/devices/pci0000:00/0000:00:1b.0/sound/card1 testserver=rhcert71 

Sound Card:

udev device: /devices/pci0000:00/0000:00:03.0/sound/card0
------------------------------------------------------
ID_VENDOR_ID 0x8086
SUBSYSTEM sound
ID_VENDOR_FROM_DATABASE Intel Corporation
DEVPATH /devices/pci0000:00/0000:00:03.0/sound/card0
ID_PATH_TAG pci-0000_00_03_0
ID_MODEL_FROM_DATABASE Broadwell-U Audio Controller
ID_PCI_SUBCLASS_FROM_DATABASE Audio device
TAGS :seat:systemd:
SYSTEMD_WANTS sound.target
ID_PATH pci-0000:00:03.0
ID_FOR_SEAT sound-pci-0000_00_03_0
SOUND_INITIALIZED 1
ID_PCI_CLASS_FROM_DATABASE Multimedia controller
info.udi /devices/pci0000:00/0000:00:03.0/sound/card0
USEC_INITIALIZED 21418
ID_MODEL_ID 0x160c
PULSE_PROFILE_SET extra-hdmi.conf
SOUND_FORM_FACTOR internal
ID_BUS pci


/proc/asound/card0/pcm8p/info
card: 0
device: 8
subdevice: 0
stream: PLAYBACK
id: HDMI 2
name: HDMI 2
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

/proc/asound/card0/pcm7p/info
card: 0
device: 7
subdevice: 0
stream: PLAYBACK
id: HDMI 1
name: HDMI 1
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

/proc/asound/card0/pcm3p/info
card: 0
device: 3
subdevice: 0
stream: PLAYBACK
id: HDMI 0
name: HDMI 0
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

This test plays a sound sample and records it to another file.
                    Please use the Volume Control application and insure that the 
                    Capture settings will record the sound. Continue? (yes|no) y
response: y
response: True
Note: No Capture Support
aplay /usr/share/sounds/alsa/Front_Right.wav -D plughw:0,3
Playing WAVE '/usr/share/sounds/alsa/Front_Right.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
aplay /usr/share/sounds/alsa/Front_Left.wav -D plughw:0,3
Playing WAVE '/usr/share/sounds/alsa/Front_Left.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
Did you hear the played sound? (yes|no) y
response: y
response: True
copying attachments...
checking directory /var/log/rhcert/runs/1/hwcert/audio 
Skipping output.log
saveOutput: /var/log/rhcert/runs/1/hwcert/audio/output.log
Return value was True
...

test suite packages:
redhat-certification-1.0-20150707.el7.noarch
redhat-certification-information-1.7.1-20150618.el7.noarch
redhat-certification-hardware-1.7.1-20150618.el7.noarch