diff --git a/extensions/ql-vscode/test/vscode-tests/utils/bundled-pack-helpers.ts b/extensions/ql-vscode/test/vscode-tests/utils/bundled-pack-helpers.ts
index 32c34cbec..f572537bf 100644
--- a/extensions/ql-vscode/test/vscode-tests/utils/bundled-pack-helpers.ts
+++ b/extensions/ql-vscode/test/vscode-tests/utils/bundled-pack-helpers.ts
@@ -8,6 +8,7 @@ export interface QueryPackFS {
   fileExists: (name: string) => boolean;
   fileContents: (name: string) => Buffer;
   directoryContents: (name: string) => string[];
+  allFiles: () => string[];
 }
 
 export async function readBundledPack(
@@ -82,5 +83,8 @@ export async function readBundledPack(
         )
         .map((dir) => dir.substring(name.length + 1));
     },
+    allFiles: (): string[] => {
+      return Object.keys(files);
+    },
   };
 }