diff --git a/kernel/go.mod b/kernel/go.mod
index fbc17c621..3c10518e6 100644
--- a/kernel/go.mod
+++ b/kernel/go.mod
@@ -36,6 +36,7 @@ require (
 	github.com/imroc/req/v3 v3.41.4
 	github.com/jinzhu/copier v0.3.5
 	github.com/json-iterator/go v1.1.12
+	github.com/klippa-app/go-pdfium v1.6.0
 	github.com/mattn/go-sqlite3 v2.0.3+incompatible
 	github.com/mitchellh/go-ps v1.0.0
 	github.com/mssola/useragent v1.0.0
@@ -64,11 +65,6 @@ require (
 	golang.org/x/text v0.12.0
 )
 
-require (
-	github.com/jolestar/go-commons-pool/v2 v2.1.2 // indirect
-	github.com/tetratelabs/wazero v1.3.1 // indirect
-)
-
 require (
 	dmitri.shuralyov.com/font/woff2 v0.0.0-20180220214647-957792cbbdab // indirect
 	github.com/JalfResi/justext v0.0.0-20170829062021-c0282dea7198 // indirect
@@ -113,10 +109,10 @@ require (
 	github.com/imdario/mergo v0.3.16 // indirect
 	github.com/jaytaylor/html2text v0.0.0-20200412013138-3577fbdbcff7 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/jolestar/go-commons-pool/v2 v2.1.2 // indirect
 	github.com/juju/errors v1.0.0 // indirect
 	github.com/klauspost/compress v1.16.7 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.5 // indirect
-	github.com/klippa-app/go-pdfium v1.6.0
 	github.com/leodido/go-urn v1.2.4 // indirect
 	github.com/levigross/exp-html v0.0.0-20120902181939-8df60c69a8f5 // indirect
 	github.com/lufia/plan9stats v0.0.0-20230326075908-cb1d2100619a // indirect
@@ -147,6 +143,7 @@ require (
 	github.com/shopspring/decimal v1.3.1 // indirect
 	github.com/spf13/cast v1.5.1 // indirect
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
+	github.com/tetratelabs/wazero v1.3.1 // indirect
 	github.com/tklauser/go-sysconf v0.3.11 // indirect
 	github.com/tklauser/numcpus v0.6.1 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
diff --git a/kernel/go.sum b/kernel/go.sum
index 3771bac46..81202f3c6 100644
--- a/kernel/go.sum
+++ b/kernel/go.sum
@@ -173,6 +173,7 @@ github.com/fatih/set v0.2.1 h1:nn2CaJyknWE/6txyUDGwysr3G5QC6xWB/PtVjPBbeaA=
 github.com/fatih/set v0.2.1/go.mod h1:+RKtMCH+favT2+3YecHGxcc0b4KyVWA1QWWJUs4E0CI=
 github.com/flopp/go-findfont v0.1.0 h1:lPn0BymDUtJo+ZkV01VS3661HL6F4qFlkhcJN55u6mU=
 github.com/flopp/go-findfont v0.1.0/go.mod h1:wKKxRDjD024Rh7VMwoU90i6ikQRCr+JTHB5n4Ejkqvw=
+github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
 github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
 github.com/frankban/quicktest v1.14.4 h1:g2rn0vABPOOXmZUj+vbmUp0lPoXEMuhTpIluN0XL9UY=
 github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
@@ -428,7 +429,7 @@ github.com/olekukonko/tablewriter v0.0.4 h1:vHD/YYe1Wolo78koG299f7V/VAS08c6IpCLn
 github.com/olekukonko/tablewriter v0.0.4/go.mod h1:zq6QwlOf5SlnkVbMSr5EoBv3636FWnp+qbPhuoO21uA=
 github.com/onsi/ginkgo/v2 v2.11.0 h1:WgqUCUt/lT6yXoQ8Wef0fsNn5cAuMK7+KT9UFRz2tcU=
 github.com/onsi/ginkgo/v2 v2.11.0/go.mod h1:ZhrRA5XmEE3x3rhlzamx/JJvujdZoJ2uvgI7kR0iZvM=
-github.com/onsi/gomega v1.27.8 h1:gegWiwZjBsf2DgiSbf5hpokZ98JVDMcWkUiigk6/KXc=
+github.com/onsi/gomega v1.27.10 h1:naR28SdDFlqrG6kScpT8VWpu1xWY5nJRCF3XaYyBjhI=
 github.com/open-spaced-repetition/go-fsrs v1.0.0 h1:FIH5MW29EEHTTLwXPeDWJqO4QA/b7L9i2GEH4lAEl0U=
 github.com/open-spaced-repetition/go-fsrs v1.0.0/go.mod h1:WpbNs4TTKZChOHFO+ME0B9femUVZsepFT5mhAioszRg=
 github.com/otiai10/curr v0.0.0-20150429015615-9b4961190c95/go.mod h1:9qAhocn7zKJG+0mI8eUu6xqkFDYS2kb2saOteoSB3cE=
diff --git a/kernel/model/asset_content_test.go b/kernel/model/asset_content_test.go
index 7af59ed18..bf6794e9d 100644
--- a/kernel/model/asset_content_test.go
+++ b/kernel/model/asset_content_test.go
@@ -1,3 +1,19 @@
+// SiYuan - Refactor your thinking
+// Copyright (c) 2020-present, b3log.org
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package model
 
 import (
@@ -6,7 +22,7 @@ import (
 
 func TestPDFParser(t *testing.T) {
 	p := &PdfAssetParser{}
-	res := p.Parse("../../testdata/parsertest.pdf")
+	res := p.Parse("../testdata/parsertest.pdf")
 	if res == nil || res.Content == "" {
 		t.Fatalf("empty or nil PDF content result")
 	}
diff --git a/testdata/parsertest.pdf b/kernel/testdata/parsertest.pdf
similarity index 100%
rename from testdata/parsertest.pdf
rename to kernel/testdata/parsertest.pdf