=== Testing monolithicFlat creation and opening ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2147483648
-image: TEST_DIR/t.vmdk
-file format: vmdk
+image: TEST_DIR/t.IMGFMT
+file format: IMGFMT
virtual size: 2.0G (2147483648 bytes)
-disk size: 4.0K
=== Testing monolithicFlat with zeroed_grain ===
qemu-img: TEST_DIR/t.IMGFMT: Flat image can't enable zeroed grain