$ sudo smartctl -t short /dev/sdc
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.10.0-862.2.3.el7.x86_64] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION ===
Sending command: "Execute SMART Short self-test routine immediately in off-line mode".
Drive command "Execute SMART Short self-test routine immediately in off-line mode" successful.
Testing has begun.
Please wait 2 minutes for test to complete.
Test will complete after Sat Feb 16 09:47:11 2019

$ date
Sat 16 Feb 09:49:47 HKT 2019
$ sudo smartctl -l selftest /dev/sdc
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.10.0-862.2.3.el7.x86_64] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]