diff --git a/lib/cartodb/server.js b/lib/cartodb/server.js
index 6cad6466..225b61c4 100644
--- a/lib/cartodb/server.js
+++ b/lib/cartodb/server.js
@@ -80,22 +80,7 @@ module.exports = function(serverOptions) {
         max_user_templates: global.environment.maxUserTemplates
     });
 
-    var surrogateKeysCacheBackends = [];
-
-    if (serverOptions.varnish_purge_enabled) {
-        surrogateKeysCacheBackends.push(
-            new VarnishHttpCacheBackend(serverOptions.varnish_host, serverOptions.varnish_http_port)
-        );
-    }
-
-    if (serverOptions.fastly &&
-        !!serverOptions.fastly.enabled && !!serverOptions.fastly.apiKey && !!serverOptions.fastly.serviceId) {
-        surrogateKeysCacheBackends.push(
-            new FastlyCacheBackend(serverOptions.fastly.apiKey, serverOptions.fastly.serviceId)
-        );
-    }
-
-    var surrogateKeysCache = new SurrogateKeysCache(surrogateKeysCacheBackends);
+    var surrogateKeysCache = new SurrogateKeysCache(surrogateKeysCacheBackends(serverOptions));
 
     function invalidateNamedMap (owner, templateName) {
         var startTime = Date.now();
@@ -440,6 +425,7 @@ module.exports = function(serverOptions) {
             }
         );
     };
+    // jshint maxcomplexity:6
 
     return app;
 };
@@ -515,6 +501,25 @@ function setupLogger(app, opts) {
     }
 }
 
+function surrogateKeysCacheBackends(serverOptions) {
+    var cacheBackends = [];
+
+    if (serverOptions.varnish_purge_enabled) {
+        cacheBackends.push(
+            new VarnishHttpCacheBackend(serverOptions.varnish_host, serverOptions.varnish_http_port)
+        );
+    }
+
+    if (serverOptions.fastly &&
+        !!serverOptions.fastly.enabled && !!serverOptions.fastly.apiKey && !!serverOptions.fastly.serviceId) {
+        cacheBackends.push(
+            new FastlyCacheBackend(serverOptions.fastly.apiKey, serverOptions.fastly.serviceId)
+        );
+    }
+
+    return cacheBackends;
+}
+
 function statusFromErrorMessage(errMsg) {
     // Find an appropriate statusCode based on message
     var statusCode = 400;