diff --git a/dictation_server/src/features/tasks/tasks.service.spec.ts b/dictation_server/src/features/tasks/tasks.service.spec.ts
index 2e1a101..54e191b 100644
--- a/dictation_server/src/features/tasks/tasks.service.spec.ts
+++ b/dictation_server/src/features/tasks/tasks.service.spec.ts
@@ -4120,20 +4120,32 @@ describe('getNextTask', () => {
 
 describe('deleteTask', () => {
   let source: DataSource | null = null;
+   beforeAll(async () => {
+     if (source == null) {
+       source = await (async () => {
+         const s = new DataSource({
+           type: 'mysql',
+           host: 'test_mysql_db',
+           port: 3306,
+           username: 'user',
+           password: 'password',
+           database: 'odms',
+           entities: [__dirname + '/../../**/*.entity{.ts,.js}'],
+           synchronize: false, // trueにすると自動的にmigrationが行われるため注意
+         });
+         return await s.initialize();
+       })();
+     }
+   });
+
   beforeEach(async () => {
-    source = new DataSource({
-      type: 'sqlite',
-      database: ':memory:',
-      logging: false,
-      entities: [__dirname + '/../../**/*.entity{.ts,.js}'],
-      synchronize: true, // trueにすると自動的にmigrationが行われるため注意
-    });
-    return source.initialize();
+    if (source) {
+      await truncateAllTable(source);
+    }
   });
 
-  afterEach(async () => {
-    if (!source) return;
-    await source.destroy();
+  afterAll(async () => {
+    await source?.destroy();
     source = null;
   });
 
diff --git a/dictation_server/src/features/tasks/test/utility.ts b/dictation_server/src/features/tasks/test/utility.ts
index eb3938e..6a1e024 100644
--- a/dictation_server/src/features/tasks/test/utility.ts
+++ b/dictation_server/src/features/tasks/test/utility.ts
@@ -158,59 +158,6 @@ export const createTask = async (
     });
   const task = taskIdentifiers.pop() as Task;
 
-  await datasource.getRepository(AudioOptionItem).insert([
-    {
-      audio_file_id: audioFile.id,
-      label: 'label01',
-      value: 'value01',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label02',
-      value: 'value02',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label03',
-      value: 'value03',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label04',
-      value: 'value04',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label05',
-      value: 'value05',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label06',
-      value: 'value06',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label07',
-      value: 'value07',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label08',
-      value: 'value08',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label09',
-      value: 'value09',
-    },
-    {
-      audio_file_id: audioFile.id,
-      label: 'label10',
-      value: 'value10',
-    },
-  ]);
-
   return { taskId: task.id, audioFileId: audioFile.id };
 };