diff --git a/services/clsi/config/settings.defaults.cjs b/services/clsi/config/settings.defaults.cjs
index d9baedc40f..ed151a9658 100644
--- a/services/clsi/config/settings.defaults.cjs
+++ b/services/clsi/config/settings.defaults.cjs
@@ -57,8 +57,10 @@ module.exports = {
       }`,
     },
     clsiCache: {
-      enabled: !!process.env.CLSI_CACHE_SHARDS,
-      shards: JSON.parse(process.env.CLSI_CACHE_SHARDS || '[]'),
+      enabled: !!process.env.CLSI_CACHE_INSTANCES,
+      shards: JSON.parse(process.env.CLSI_CACHE_INSTANCES || '[]').filter(
+        ({ zone }) => zone === process.env.ZONE
+      ),
     },
   },