diff --git a/wintest/wintest.py b/wintest/wintest.py
index 914b5d61689..5a52427f333 100644
--- a/wintest/wintest.py
+++ b/wintest/wintest.py
@@ -136,7 +136,6 @@ class wintest():
             if var_name not in self.vars:
                 raise RuntimeError("Unknown substitution variable ${%s}" % var_name)
             text = text.replace("${%s}" % var_name, self.vars[var_name])
-        return text
 
     def have_var(self, varname):
         '''see if a variable has been set'''