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-rw-r--r--tests/qemu-iotests/common2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/qemu-iotests/common b/tests/qemu-iotests/common
index 4743c9e007..b2a0944ae0 100644
--- a/tests/qemu-iotests/common
+++ b/tests/qemu-iotests/common
@@ -49,7 +49,7 @@ export IMGFMT=raw
export IMGFMT_GENERIC=true
export IMGPROTO=file
export IMGOPTS=""
-export CACHEMODE="writethrough"
+export CACHEMODE="writeback"
export QEMU_IO_OPTIONS=""
export CACHEMODE_IS_DEFAULT=true