gistfile1.txt

~/tmp/tmp ⬤  echo | sfdisk test.img 
Checking that no-one is using this disk right now ... OK

Disk test.img: 80 MiB, 83886080 bytes, 163840 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 94AD84CD-9900-488A-B4CA-545BB6FA8EA5

Old situation:

Device     Start    End Sectors Size Type
test.img1   2048   4095    2048   1M Linux filesystem
test.img2   4096 161791  157696  77M Linux filesystem

>>> Done.

New situation:
Disklabel type: gpt
Disk identifier: 94AD84CD-9900-488A-B4CA-545BB6FA8EA5

Device     Start    End Sectors Size Type
test.img1   2048   4095    2048   1M Linux filesystem
test.img2   4096 161791  157696  77M Linux filesystem

The partition table has been altered.
Syncing disks.

~/tmp/tmp ⬤  echo print | parted test.img 
WARNING: You are not superuser.  Watch out for permissions.
GNU Parted 3.3
Using /Users/samuel/tmp/tmp/test.img
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
Model:  (file)
Disk /Users/samuel/tmp/tmp/test.img: 83.9MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name     Flags
 1      1049kB  2097kB  1049kB               no-fs
 2      2097kB  82.8MB  80.7MB               primary

(parted)