These tests pass with parallels format. Add parallels to supporting
formats for these tests.

Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
---
 tests/qemu-iotests/256                      | 2 +-
 tests/qemu-iotests/299                      | 2 +-
 tests/qemu-iotests/304                      | 2 +-
 tests/qemu-iotests/tests/block-status-cache | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/qemu-iotests/256 b/tests/qemu-iotests/256
index f34af6cef7..1a4c9c6885 100755
--- a/tests/qemu-iotests/256
+++ b/tests/qemu-iotests/256
@@ -26,7 +26,7 @@ from iotests import log
 
 iotests.verify_virtio_scsi_pci_or_ccw()
 
-iotests.script_initialize(supported_fmts=['qcow2'])
+iotests.script_initialize(supported_fmts=['qcow2', 'parallels'])
 size = 64 * 1024 * 1024
 
 with iotests.FilePath('img0') as img0_path, \
diff --git a/tests/qemu-iotests/299 b/tests/qemu-iotests/299
index a7122941fd..d8c4399446 100755
--- a/tests/qemu-iotests/299
+++ b/tests/qemu-iotests/299
@@ -23,7 +23,7 @@ import iotests
 
 # The test is unrelated to formats, restrict it to qcow2 to avoid extra runs
 iotests.script_initialize(
-    supported_fmts=['qcow2'],
+    supported_fmts=['qcow2', 'parallels'],
 )
 
 nbd_sock = iotests.file_path('nbd.sock', base_dir=iotests.sock_dir)
diff --git a/tests/qemu-iotests/304 b/tests/qemu-iotests/304
index 198f282087..1ebf999930 100755
--- a/tests/qemu-iotests/304
+++ b/tests/qemu-iotests/304
@@ -23,7 +23,7 @@
 import iotests
 from iotests import qemu_img_create, qemu_img_log, file_path
 
-iotests.script_initialize(supported_fmts=['qcow2'],
+iotests.script_initialize(supported_fmts=['qcow2', 'parallels'],
                           supported_protocols=['file'])
 
 test_img = file_path('test.qcow2')
diff --git a/tests/qemu-iotests/tests/block-status-cache b/tests/qemu-iotests/tests/block-status-cache
index 5a7bc2c149..ade3d5b169 100755
--- a/tests/qemu-iotests/tests/block-status-cache
+++ b/tests/qemu-iotests/tests/block-status-cache
@@ -131,5 +131,5 @@ class TestBscWithNbd(iotests.QMPTestCase):
 if __name__ == '__main__':
     # The block-status cache only works on the protocol layer, so to test it,
     # we can only use the raw format
-    iotests.main(supported_fmts=['raw'],
+    iotests.main(supported_fmts=['raw', 'parallels'],
                  supported_protocols=['file'])
-- 
2.40.1