diff --git a/internal/handlers/handlers.go b/internal/handlers/handlers.go
index af96604..489e3c3 100644
--- a/internal/handlers/handlers.go
+++ b/internal/handlers/handlers.go
@@ -80,20 +80,25 @@ func (s *Handlers) WaitForProcessing(ctx context.Context) int {
 	return s.imgSvc.WaitForProcessing(ctx)
 }
 
-// initImageService initializes the image cache and service.
-func (s *Handlers) initImageService() error {
-	// Create the cache. cache_max_bytes: 0 disables the disk cache
-	// entirely; any other value is the eviction limit in bytes; when
-	// it is omitted, the cache works out the default limit itself.
-	cache, err := imgcache.NewCache(s.db.DB(), imgcache.CacheConfig{
-		StateDir:           s.config.StateDir,
+// newCacheConfig builds the image cache's configuration from cfg.
+// cache_max_bytes: 0 disables the disk cache entirely; any other value
+// is the eviction limit in bytes; when it is omitted, the cache works
+// out the default limit itself.
+func newCacheConfig(cfg *config.Config, log *slog.Logger) imgcache.CacheConfig {
+	return imgcache.CacheConfig{
+		StateDir:           cfg.StateDir,
 		CacheTTL:           imgcache.DefaultCacheTTL,
 		NegativeTTL:        imgcache.DefaultNegativeTTL,
-		MaxBytes:           s.config.CacheMaxBytes,
-		UseDefaultMaxBytes: !s.config.CacheMaxBytesExplicit,
-		DisableDiskCache:   s.config.CacheMaxBytesExplicit && s.config.CacheMaxBytes == 0,
-		Logger:             s.log,
-	})
+		MaxBytes:           cfg.CacheMaxBytes,
+		UseDefaultMaxBytes: !cfg.CacheMaxBytesExplicit,
+		DisableDiskCache:   cfg.CacheMaxBytesExplicit && cfg.CacheMaxBytes == 0,
+		Logger:             log,
+	}
+}
+
+// initImageService initializes the image cache and service.
+func (s *Handlers) initImageService() error {
+	cache, err := imgcache.NewCache(s.db.DB(), newCacheConfig(s.config, s.log))
 	if err != nil {
 		return err
 	}