diff --git a/qtest/make.ml b/qtest/make.ml
index bb4cb540..0f695470 100644
--- a/qtest/make.ml
+++ b/qtest/make.ml
@@ -18,10 +18,13 @@ let is_code file = is_suffix ~sub:".ml" file || is_suffix ~sub:".mli" file
 let do_not_test file =
   assert (not (is_suffix ~sub:"make.ml" file));
   str_sub ~sub:"Labels.ml" file ||
+  is_suffix ~sub:".pp.ml" file ||
+  is_suffix ~sub:".pp.mli" file ||
   is_suffix ~sub:"containers.ml" file ||
   is_suffix ~sub:"_top.ml" file ||
   is_suffix ~sub:"mkflags.ml" file ||
   is_suffix ~sub:"mkshims.ml" file ||
+  is_suffix ~sub:"cpp.ml" file ||
   is_suffix ~sub:"unlabel.ml" file ||
   is_suffix ~sub:"check_labelled_mods.ml" file ||
   is_suffix ~sub:"test_random.ml" file ||