diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 908a8e7..0b2bcfc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,4 +1,4 @@
-# Copyright (c) 2023 Koji Hasegawa.
+# Copyright (c) 2023-2024 Koji Hasegawa.
 # This software is released under the MIT License.
 
 name: Test
@@ -18,6 +18,9 @@ on:
       - '.github/**'
       - '!.github/workflows/test.yml'
 
+env:
+  PACKAGE_NAME: com.nowsprinting.test-helper
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -42,12 +45,6 @@ jobs:
             octocov: true
 
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          submodules: false
-          lfs: false
-
       - name: Crete project for tests
         uses: nowsprinting/create-unity-project-action@v3
         with:
@@ -60,9 +57,14 @@ jobs:
           restore-keys: |
             Library-
 
-      - name: Set package name
-        run: |
-          echo "package_name=$(grep -o -E '"name": "(.+)"' ./package.json | cut -d ' ' -f2)" >> "$GITHUB_ENV"
+      - name: Checkout repository as embedded package
+        uses: actions/checkout@v4
+        with:
+          submodules: false
+          lfs: false
+          path: ${{ env.CREATED_PROJECT_PATH }}/Packages/${{ env.PACKAGE_NAME }}
+          # In Linux editor, there is a problem that assets in local packages cannot be found with `AssetDatabase.FindAssets`.
+          # As a workaround, I have made it into an embedded package.
 
       - name: Install dependencies
         run: |
@@ -99,7 +101,9 @@ jobs:
         id: test
 
       - name: Set coverage path for octocov
-        run: sed -i -r 's/UnityProject~\/Logs/${{ steps.test.outputs.coveragePath }}/' .octocov.yml
+        run: |
+          mv ${{ env.CREATED_PROJECT_PATH }}/Packages/${{ env.PACKAGE_NAME }}/.octocov.yml .
+          sed -i -r 's/UnityProject~\/Logs/${{ steps.test.outputs.coveragePath }}/' .octocov.yml
         if: ${{ matrix.octocov }}
 
       - name: Run octocov