diff --git a/ext/json/tests/bug65499.phpt b/ext/json/tests/bug65499.phpt
new file mode 100644
index 0000000000000..cefe3b76d2150
--- /dev/null
+++ b/ext/json/tests/bug65499.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug #65499 (json_decode reports invalid literal as valid JSON)
+--SKIPIF--
+<?php if (!extension_loaded("json")) print "skip"; ?>
+--FILE--
+<?php
+
+var_dump(
+  json_decode("9af5"),
+  json_last_error(),
+  json_decode("129hsk"),
+  json_last_error()
+);
+
+?>
+--EXPECT--
+NULL
+int(4)
+NULL
+int(4)