diff --git a/pkg/compactor/compactor.go b/pkg/compactor/compactor.go
index 03b55f1e0d..fd8386a737 100644
--- a/pkg/compactor/compactor.go
+++ b/pkg/compactor/compactor.go
@@ -249,7 +249,7 @@ func (cfg *Config) RegisterFlags(f *flag.FlagSet) {
 	f.DurationVar(&cfg.BlockVisitMarkerFileUpdateInterval, "compactor.block-visit-marker-file-update-interval", 1*time.Minute, "How frequently block visit marker file should be updated duration compaction.")
 
 	f.BoolVar(&cfg.AcceptMalformedIndex, "compactor.accept-malformed-index", false, "When enabled, index verification will ignore out of order label names.")
-	f.BoolVar(&cfg.CachingBucketEnabled, "compactor.caching-bucket-enabled", false, "When enabled, caching bucket will be used for compactor, except cleaner service.")
+	f.BoolVar(&cfg.CachingBucketEnabled, "compactor.caching-bucket-enabled", false, "When enabled, caching bucket will be used for compactor, except cleaner service, which serves as the source of truth for block status")
 }
 
 func (cfg *Config) Validate(limits validation.Limits) error {
diff --git a/pkg/compactor/compactor_test.go b/pkg/compactor/compactor_test.go
index 8998fa4fae..00a2c9bd49 100644
--- a/pkg/compactor/compactor_test.go
+++ b/pkg/compactor/compactor_test.go
@@ -1644,6 +1644,9 @@ func prepareConfig() Config {
 	// Set lower timeout for waiting on compactor to become ACTIVE in the ring for unit tests
 	compactorCfg.ShardingRing.WaitActiveInstanceTimeout = 5 * time.Second
 
+	// Set CachingBucketEnabled to true
+	compactorCfg.CachingBucketEnabled = true
+
 	return compactorCfg
 }