diff --git a/tests/functional/grammar/test_grammar.py b/tests/functional/grammar/test_grammar.py
index c1d2e1d6e6..2af5385b3d 100644
--- a/tests/functional/grammar/test_grammar.py
+++ b/tests/functional/grammar/test_grammar.py
@@ -39,7 +39,7 @@ def test_basic_grammar_empty():
 
 def fix_terminal(terminal: str) -> str:
     # these throw exceptions in the grammar
-    for bad in ("\x00", "\\ ", "\x0c"):
+    for bad in ("\x00", "\\ ", "\x0c", "\x0d"):
         terminal = terminal.replace(bad, " ")
     return terminal