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-rwxr-xr-xtests/functional/test_s390x_ccw_virtio.py6
1 files changed, 2 insertions, 4 deletions
diff --git a/tests/functional/test_s390x_ccw_virtio.py b/tests/functional/test_s390x_ccw_virtio.py
index e5884a4dd0..453711aa0f 100755
--- a/tests/functional/test_s390x_ccw_virtio.py
+++ b/tests/functional/test_s390x_ccw_virtio.py
@@ -17,7 +17,7 @@ import tempfile
 from qemu_test import QemuSystemTest, Asset
 from qemu_test import exec_command_and_wait_for_pattern
 from qemu_test import wait_for_console_pattern
-from qemu_test.utils import lzma_uncompress
+
 
 class S390CCWVirtioMachine(QemuSystemTest):
     KERNEL_COMMON_COMMAND_LINE = 'printk.time=0 '
@@ -174,9 +174,7 @@ class S390CCWVirtioMachine(QemuSystemTest):
 
         kernel_path = self.ASSET_F31_KERNEL.fetch()
 
-        initrd_path_xz = self.ASSET_F31_INITRD.fetch()
-        initrd_path = self.scratch_file('initrd-raw.img')
-        lzma_uncompress(initrd_path_xz, initrd_path)
+        initrd_path = self.uncompress(self.ASSET_F31_INITRD, format="xz")
 
         self.vm.set_console()
         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE + ' audit=0 '