diff --git a/scripts/test-bifrost.sh b/scripts/test-bifrost.sh
index d8368015d..79add4086 100755
--- a/scripts/test-bifrost.sh
+++ b/scripts/test-bifrost.sh
@@ -24,6 +24,7 @@ BUILD_IMAGE="false"
 
 VM_MEMORY_SIZE="3072"
 VM_DOMAIN_TYPE=qemu
+export VM_DISK_CACHE="unsafe"
 TEST_VM_NUM_NODES=1
 USE_CIRROS=true
 TESTING_USER=cirros