diff --git a/fsprovider-sample/package.json b/fsprovider-sample/package.json
index 30da2ca6..e1fae712 100644
--- a/fsprovider-sample/package.json
+++ b/fsprovider-sample/package.json
@@ -12,7 +12,7 @@
         "Other"
     ],
     "activationEvents": [
-        "onFileSystemAccess:memfs"
+        "onFileSystem:memfs"
     ],
     "main": "./out/src/extension",
     "contributes": {
diff --git a/fsprovider-sample/src/extension.ts b/fsprovider-sample/src/extension.ts
index 0cdbb740..b0e69356 100644
--- a/fsprovider-sample/src/extension.ts
+++ b/fsprovider-sample/src/extension.ts
@@ -14,6 +14,7 @@ export function activate(context: vscode.ExtensionContext) {
             initialzied = true;
 
             memFs.createDirectory(vscode.Uri.parse(`memfs:/folder/`));
+            memFs.createDirectory(vscode.Uri.parse(`memfs:/large/`));
             memFs.createDirectory(vscode.Uri.parse(`memfs:/xyz/`));
             memFs.createDirectory(vscode.Uri.parse(`memfs:/xyz/abc`));
             memFs.createDirectory(vscode.Uri.parse(`memfs:/xyz/def`));
@@ -21,7 +22,8 @@ export function activate(context: vscode.ExtensionContext) {
             memFs.writeFile(vscode.Uri.parse(`memfs:/empty.txt`), new Uint8Array(0), { create: true });
             memFs.writeFile(vscode.Uri.parse(`memfs:/file.txt`), Buffer.from('foo'), { create: true });
             memFs.writeFile(vscode.Uri.parse(`memfs:/file.css`), Buffer.from('* { color: green; }'), { create: true });
-            memFs.writeFile(vscode.Uri.parse(`memfs:/large-rnd.foo`), randomData(50000), { create: true });
+            memFs.writeFile(vscode.Uri.parse(`memfs:/large/rnd.foo`), randomData(30000), { create: true });
+            memFs.writeFile(vscode.Uri.parse(`memfs:/large/too_large.foo`), randomData(50000), { create: true });
             memFs.writeFile(vscode.Uri.parse(`memfs:/folder/empty.foo`), new Uint8Array(0), { create: true });
             memFs.writeFile(vscode.Uri.parse(`memfs:/folder/file.ts`), Buffer.from('let a:number = true; console.log(a);'), { create: true });
             memFs.writeFile(vscode.Uri.parse(`memfs:/xyz/def/foo.md`), Buffer.from('*MemFS*'), { create: true });