diff --git a/oxrlib/loaders.py b/oxrlib/loaders.py
index 750ec3f58dde46f48b0e216b5348f8e112da27c2..2a600ed36a010e9e3e8dbd62e342f9c50efeaff5 100644
--- a/oxrlib/loaders.py
+++ b/oxrlib/loaders.py
@@ -14,10 +14,11 @@ class ReadCacheFile(cache.CacheFileBase):
 
 
 class FileCache(cache.CacheBase):
+    CacheFile = ReadCacheFile
     ConfigurationError = errors.CacheLoaderConfigurationError
 
     def open(self, path):
-        return ReadCacheFile(path)
+        return self.CacheFile(path)
 
 
 class OXRAPIRequest: