diff --git a/src/backend/model/database/memory/PersonManager.ts b/src/backend/model/database/memory/PersonManager.ts
index 180a7931..217e786e 100644
--- a/src/backend/model/database/memory/PersonManager.ts
+++ b/src/backend/model/database/memory/PersonManager.ts
@@ -5,11 +5,15 @@ import {PersonDTO} from '../../../../common/entities/PersonDTO';
 export class PersonManager implements IPersonManager {
 
   getAll(): Promise<any[]> {
-    throw new Error('Method not implemented.');
+    throw new Error('not supported by memory DB');
   }
 
   getSamplePhoto(name: string): Promise<PhotoDTO> {
-    throw new Error('Method not implemented.');
+    throw new Error('not supported by memory DB');
+  }
+
+  getSamplePhotos(names: string[]): Promise<{ [key: string]: PhotoDTO }> {
+    throw new Error('not supported by memory DB');
   }
 
   get(name: string): Promise<any> {