diff --git a/single_file_tests/pretty_json.ts b/single_file_tests/pretty_json.ts
new file mode 100644
index 0000000..f32aafc
--- /dev/null
+++ b/single_file_tests/pretty_json.ts
@@ -0,0 +1 @@
+console.log(JSON.stringify({a:[1,2,3],b:11111}, null, 4));