Firmware, FactoryTest v0.1.0 , Test 5 Locks Up Code if No SD Card

[ForrestErickson]

Describe the bug
A clear and concise description of what the bug is.

Short Summary of the expected behavior: I expect tests to report pass or fail.

Short Summary of the buggy behavior: Test 5 SD (DFPlayer card) starts but fails to return.

I can issue no other tests.
There is no flashing StatusLED

To Reproduce
Steps to reproduce the behavior:

1. Open code in Arduino IDE.
2. Connect if necessary a KRAKE to a USB port
3. Compile and upload into the Krake
4. Open Serial Monitor.
5. Press 5 and observe the results of test.

Hardware description
Model: Krake Rev2 Assembly
Serial Number: US0006