Foreman-maintain upgrade check is giving an error regarding 'less than 4GB space available on root(/) partition'

Issue

The foreman-maintain upgrade check --target-version 6.4.z command fails when looking for 4GB under /.

Does the Satellite 6.5 upgrade process actually need 4GB free under /?

root@host [/root/directory]
# foreman-maintain upgrade check --target-version 6.4.z --whitelist="disk-performance"
Running Checks before upgrading to Satellite 6.4.z
...
Check to make sure root(/) partition has enough space:                [FAIL]    
System has less than 4GB space available on root(/) partition
...
The following steps ended up in failing state:
...
  [available-space]