diff --git a/go.mod b/go.mod
index 77041ab..48dfc28 100644
--- a/go.mod
+++ b/go.mod
@@ -28,8 +28,7 @@ require (
 
 replace github.com/icedream/go-bsdiff v1.0.1 => github.com/naoki9911/go-bsdiff v1.0.3
 
-//replace github.com/nine-lives-later/go-xdelta v0.3.2-0.20200813195159-a23b3640ca1a => github.com/naoki9911/go-xdelta v0.0.1
-replace github.com/nine-lives-later/go-xdelta v0.3.2-0.20200813195159-a23b3640ca1a => ../go-xdelta
+replace github.com/nine-lives-later/go-xdelta v0.3.2-0.20200813195159-a23b3640ca1a => github.com/naoki9911/go-xdelta v0.0.2
 
 require (
 	github.com/Microsoft/go-winio v0.6.1 // indirect
@@ -59,7 +58,6 @@ require (
 	github.com/opencontainers/selinux v1.10.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/ulikunitz/xz v0.5.12 // indirect
 	github.com/vbatts/tar-split v0.11.3 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
diff --git a/go.sum b/go.sum
index 6d5e193..1aaf7c0 100644
--- a/go.sum
+++ b/go.sum
@@ -516,6 +516,8 @@ github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRW
 github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f/go.mod h1:ZdcZmHo+o7JKHSa8/e818NopupXU1YMK5fe1lsApnBw=
 github.com/naoki9911/go-bsdiff v1.0.3 h1:vWQ42T3I04EJr2YfnBIIoyami5aL6C0n+dyZLtY75v4=
 github.com/naoki9911/go-bsdiff v1.0.3/go.mod h1:gGhdZZqlpfmaUUEzntr3mDeO3dy0tvlIJ7F+a4z/vxY=
+github.com/naoki9911/go-xdelta v0.0.2 h1:xwj0UbiFrJruBa3CfutQSEBjbkAQNflHopUE5Djtc8Y=
+github.com/naoki9911/go-xdelta v0.0.2/go.mod h1:uFQzElLkPDY5XVZWBJxDXaymJk/IrWZnq4uEl8rxaVg=
 github.com/ncw/swift v1.0.47/go.mod h1:23YIA4yWVnGwv2dQlN4bB7egfYX6YLn0Yo/S6zZO/ZM=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
@@ -685,8 +687,6 @@ github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/ulikunitz/xz v0.5.6/go.mod h1:2bypXElzHzzJZwzH67Y6wb67pO62Rzfn7BSiF4ABRW8=
-github.com/ulikunitz/xz v0.5.12 h1:37Nm15o69RwBkXM0J6A5OlE67RZTfzUxTj8fB3dfcsc=
-github.com/ulikunitz/xz v0.5.12/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
 github.com/urfave/cli v0.0.0-20171014202726-7bc6a0acffa5/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
diff --git a/pkg/utils/utils.go b/pkg/utils/utils.go
index 670c535..83698e1 100644
--- a/pkg/utils/utils.go
+++ b/pkg/utils/utils.go
@@ -9,7 +9,6 @@ import (
 	"math/rand"
 	"os"
 	"strings"
-	"time"
 
 	"github.com/klauspost/compress/zstd"
 	"github.com/opencontainers/go-digest"
@@ -111,7 +110,6 @@ var (
 )
 
 func randSequence(n int) string {
-	rand.Seed(time.Now().UnixNano())
 	b := make([]byte, n)
 	for i := range b {
 		b[i] = letters[rand.Intn(len(letters))]
diff --git a/tests/launch_test_lxc.sh b/tests/launch_test_lxc.sh
index 10bac00..303391f 100755
--- a/tests/launch_test_lxc.sh
+++ b/tests/launch_test_lxc.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 set -ux -o pipefail
-IMAGE=${1:-"images:ubuntu/22.04"}
+IMAGE=${1:-"images:ubuntu/jammy"}
 
 cd $(cd $(dirname $0); pwd)
 
diff --git a/tests/setup_test.sh b/tests/setup_test.sh
index 4ec3db0..bccda4a 100755
--- a/tests/setup_test.sh
+++ b/tests/setup_test.sh
@@ -27,7 +27,7 @@ echo "===== Prepare ====="
   sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
 
   sudo apt-get update
-  sudo DEBIAN_FRONTEND=noninteractive apt-get install -y dbus-user-session docker-ce containerd.io fuse3 python3 python3-pip jq
+  sudo DEBIAN_FRONTEND=noninteractive apt-get install -y dbus-user-session docker-ce containerd.io fuse3 python3 python3-pip jq xdelta3
   sudo pip3 install docker-squash matplotlib
 
   systemctl --user start dbus