diff --git a/lib/config/config-cache.js b/lib/config/config-cache.js
index 0ffcae9440f..b89f33430d5 100644
--- a/lib/config/config-cache.js
+++ b/lib/config/config-cache.js
@@ -24,9 +24,9 @@ function hash(vector) {
 //------------------------------------------------------------------------------
 
 /**
- * Configuration caching class (not exported)
+ * Configuration caching class
  */
-class ConfigCache {
+module.exports = class ConfigCache {
 
     constructor() {
         this.filePathCache = new Map();
@@ -125,6 +125,4 @@ class ConfigCache {
     setMergedConfig(vector, config) {
         this.mergedCache.set(hash(vector), config);
     }
-}
-
-module.exports = ConfigCache;
+};