diff --git a/testsuite/drivers/unparser_driver.py b/testsuite/drivers/unparser_driver.py
index 37159a04c..577e80b08 100644
--- a/testsuite/drivers/unparser_driver.py
+++ b/testsuite/drivers/unparser_driver.py
@@ -39,7 +39,7 @@ def run(self) -> None:
         # Run the unparser on "input.ada" for the given grammar rule and
         # unparse it with the default unparsing configuration, with a dump of
         # the Prettier document.
-        argv = ["lal_unparse", "-d"]
+        argv = ["lal_unparse", "-d", "-w", "79", "-i", "3"]
 
         rule = self.test_env.get("rule")
         if rule: