diff --git a/registry/storage/cache/cachecheck/suite.go b/registry/storage/cache/cachecheck/suite.go
index d241bd04..12d6e45d 100644
--- a/registry/storage/cache/cachecheck/suite.go
+++ b/registry/storage/cache/cachecheck/suite.go
@@ -54,6 +54,10 @@ func checkBlobDescriptorCacheEmptyRepository(ctx context.Context, t *testing.T,
 		t.Fatalf("expected error checking for cache item with empty digest: %v", err)
 	}
 
+	if _, err := cache.Stat(ctx, "sha384:cba111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111"); err != distribution.ErrBlobUnknown {
+		t.Fatalf("expected unknown blob error with uncached repo: %v", err)
+	}
+
 	if _, err := cache.Stat(ctx, "sha384:abc111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111"); err != distribution.ErrBlobUnknown {
 		t.Fatalf("expected unknown blob error with empty repo: %v", err)
 	}
diff --git a/registry/storage/cache/redis/redis.go b/registry/storage/cache/redis/redis.go
index 531fae2f..8d32aa48 100644
--- a/registry/storage/cache/redis/redis.go
+++ b/registry/storage/cache/redis/redis.go
@@ -186,6 +186,10 @@ func (rsrbds *repositoryScopedRedisBlobDescriptorService) Stat(ctx context.Conte
 	// We allow a per repository mediatype, let's look it up here.
 	mediatype, err := redis.String(conn.Do("HGET", rsrbds.blobDescriptorHashKey(dgst), "mediatype"))
 	if err != nil {
+		if err == redis.ErrNil {
+			return distribution.Descriptor{}, distribution.ErrBlobUnknown
+		}
+
 		return distribution.Descriptor{}, err
 	}