diff --git a/playgrounds/sandbox/run.js b/playgrounds/sandbox/run.js
index dd66b2e184..93d01a4b10 100644
--- a/playgrounds/sandbox/run.js
+++ b/playgrounds/sandbox/run.js
@@ -87,18 +87,18 @@ for (const generate of /** @type {const} */ (['client', 'server'])) {
 		write(output_js, compiled.js.code + '\n//# sourceMappingURL=' + path.basename(output_map));
 		write(output_map, compiled.js.map.toString());
 
-		// generate with templatingMode: 'functional'
+		// generate with fragments: 'tree'
 		if (generate === 'client') {
 			const compiled = compile(source, {
 				dev: true,
 				filename: input,
 				generate,
 				runes: argv.values.runes,
-				templatingMode: 'functional'
+				fragments: 'tree'
 			});
 
-			const output_js = `${cwd}/output/${generate}/${file}.functional.js`;
-			const output_map = `${cwd}/output/${generate}/${file}.functional.js.map`;
+			const output_js = `${cwd}/output/${generate}/${file}.tree.js`;
+			const output_map = `${cwd}/output/${generate}/${file}.tree.js.map`;
 
 			write(output_js, compiled.js.code + '\n//# sourceMappingURL=' + path.basename(output_map));
 			write(output_map, compiled.js.map.toString());