diff --git a/packages/plugin-ext/src/hosted/node/plugin-reader.ts b/packages/plugin-ext/src/hosted/node/plugin-reader.ts
index 6792a35507ff2..32a0a69398464 100644
--- a/packages/plugin-ext/src/hosted/node/plugin-reader.ts
+++ b/packages/plugin-ext/src/hosted/node/plugin-reader.ts
@@ -31,7 +31,7 @@ export class HostedPluginReader implements BackendApplicationContribution {
     protected readonly logger: ILogger;
 
     @inject(MetadataScanner)
-    private readonly scanner: MetadataScanner;
+    protected readonly scanner: MetadataScanner;
 
     @optional()
     @multiInject(MetadataProcessor) private readonly metadataProcessors: MetadataProcessor[];