diff --git a/fuzz.py b/fuzz.py
index a9ca8eff8b0..09a86a2f571 100644
--- a/fuzz.py
+++ b/fuzz.py
@@ -32,7 +32,9 @@
         black.FileMode,
         line_length=st.just(88) | st.integers(0, 200),
         string_normalization=st.booleans(),
+        preview=st.booleans(),
         is_pyi=st.booleans(),
+        magic_trailing_comma=st.booleans(),
     ),
 )
 def test_idempotent_any_syntatically_valid_python(