diff --git a/.github/workflows/samples-dressca-backend.ci.yml b/.github/workflows/samples-dressca-backend.ci.yml
index 827cd463a..f021f95e8 100644
--- a/.github/workflows/samples-dressca-backend.ci.yml
+++ b/.github/workflows/samples-dressca-backend.ci.yml
@@ -58,13 +58,13 @@ jobs:
           echo '# Build Result :gear:' >> $GITHUB_STEP_SUMMARY
           cat build-result.txt | sed -n -e 's/^/> /p' >> $GITHUB_STEP_SUMMARY
 
-      - name: 結合テスト用 PostgreSQL のセットアップ
+      - name: 結合テスト用 MySQL のセットアップ
         shell: bash
         run: |
-          sudo systemctl start postgresql.service
-          sudo bash -c "echo \"local all all md5\" >> /etc/postgresql/14/main/pg_hba.conf"
-          sudo su postgres -c "psql postgres -c \"alter role postgres with login password 'postgres';\""
-          sudo su postgres -c "psql postgres -c 'create database dressca_eshop;'"
+          sudo systemctl start mysql.service
+          sudo mysql -u root -p
+          root
+          create database dressca_eshop;
 
       - id: run-tests
         name: テストの実行
diff --git a/samples/Dressca/dressca-backend/Directory.Packages.props b/samples/Dressca/dressca-backend/Directory.Packages.props
index ce07bfe0a..822e59f3b 100644
--- a/samples/Dressca/dressca-backend/Directory.Packages.props
+++ b/samples/Dressca/dressca-backend/Directory.Packages.props
@@ -16,6 +16,7 @@
     <PackageVersion Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="6.0.22" />
     <PackageVersion Include="NSwag.AspNetCore" Version="13.19.0" />
     <PackageVersion Include="NSwag.MSBuild" Version="13.19.0" />
+    <PackageVersion Include="Pomelo.EntityFrameworkCore.MySql" Version="6.0.2" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.435" />
     <PackageVersion Include="xunit" Version="2.5.0" />
     <PackageVersion Include="xunit.abstractions" Version="2.0.3" />
diff --git a/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/CustomWebApplicationFactory.cs b/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/CustomWebApplicationFactory.cs
index 5e496d91f..ff32abbdf 100644
--- a/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/CustomWebApplicationFactory.cs
+++ b/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/CustomWebApplicationFactory.cs
@@ -27,7 +27,7 @@ protected override void ConfigureWebHost(IWebHostBuilder builder)
 
             services.AddDbContext<DresscaDbContext>( options =>
             {
-                options.UseNpgsql("Host=localhost;Database=dressca_eshop;Username=postgres;Password=postgres");
+                options.UseMySql("server=localhost;user=root;password=root;database=dressca_eshop;",new MySqlServerVersion(new Version(8,0,34)));
             });
         });
 
diff --git a/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/Dressca.IntegrationTest.csproj b/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/Dressca.IntegrationTest.csproj
index c14a1dc33..2910e4a43 100644
--- a/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/Dressca.IntegrationTest.csproj
+++ b/samples/Dressca/dressca-backend/tests/Dressca.IntegrationTest/Dressca.IntegrationTest.csproj
@@ -13,6 +13,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" />
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" />
     <PackageReference Include="xunit" />
     <PackageReference Include="xunit.runner.visualstudio">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>