diff --git a/tests/jerry/variables.js b/tests/jerry/variables.js
index 9a6788f02..d16866299 100644
--- a/tests/jerry/variables.js
+++ b/tests/jerry/variables.js
@@ -16,5 +16,6 @@ var real = 42;
 var float = 3.14;
 var integer = -4;
 var exponent = 1e7;
+var str = 'literal';
 
 a = 42;