diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index add5d59d9b..568285f623 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -46,7 +46,6 @@ type Source = {
 		pass: string;
 	}[];
 	redis: RedisOptionsSource;
-	redisForDatabaseCache?: RedisOptionsSource;
 	redisForPubsub?: RedisOptionsSource;
 	redisForJobQueue?: RedisOptionsSource;
 	redisForSystemQueue?: RedisOptionsSource;
@@ -177,7 +176,6 @@ export type Config = {
 	externalMediaProxyEnabled: boolean;
 	videoThumbnailGenerator: string | null;
 	redis: RedisOptions & RedisOptionsSource;
-	redisForDatabaseCache: RedisOptions & RedisOptionsSource;
 	redisForPubsub: RedisOptions & RedisOptionsSource;
 	redisForSystemQueue: RedisOptions & RedisOptionsSource;
 	redisForEndedPollNotificationQueue: RedisOptions & RedisOptionsSource;
@@ -253,7 +251,6 @@ export function loadConfig(): Config {
 		dbSlaves: config.dbSlaves,
 		meilisearch: config.meilisearch,
 		redis,
-		redisForDatabaseCache: config.redisForDatabaseCache ? convertRedisOptions(config.redisForDatabaseCache, host) : redis,
 		redisForPubsub: config.redisForPubsub ? convertRedisOptions(config.redisForPubsub, host) : redis,
 		redisForSystemQueue: config.redisForSystemQueue ? convertRedisOptions(config.redisForSystemQueue, host) : redisForJobQueue,
 		redisForEndedPollNotificationQueue: config.redisForEndedPollNotificationQueue ? convertRedisOptions(config.redisForEndedPollNotificationQueue, host) : redisForJobQueue,
diff --git a/packages/backend/src/postgres.ts b/packages/backend/src/postgres.ts
index 0552a2d878..3d665d3e44 100644
--- a/packages/backend/src/postgres.ts
+++ b/packages/backend/src/postgres.ts
@@ -236,13 +236,7 @@ export function createPostgresDataSource(config: Config) {
 		} : {}),
 		synchronize: process.env.NODE_ENV === 'test',
 		dropSchema: process.env.NODE_ENV === 'test',
-		cache: !config.db.disableCache && process.env.NODE_ENV !== 'test' ? { // dbをcloseしても何故かredisのコネクションが内部的に残り続けるようで、テストの際に支障が出るため無効にする(キャッシュも含めてテストしたいため本当は有効にしたいが...)
-			type: 'ioredis',
-			options: {
-				...config.redisForDatabaseCache,
-				keyPrefix: `${config.redisForDatabaseCache.prefix}:query:`,
-			},
-		} : false,
+		cache: !config.db.disableCache && process.env.NODE_ENV !== 'test',
 		logging: log,
 		logger: log ? new MyCustomLogger() : undefined,
 		maxQueryExecutionTime: 10000, // 10s