diff --git a/src/test/dune b/src/test/dune
index a65a038c0..24a44109f 100644
--- a/src/test/dune
+++ b/src/test/dune
@@ -7,7 +7,7 @@
     tezos-crypto
   )
   (preprocess
-    (pps ppx_let bisect_ppx --conditional)
+    (pps ppx_let)
   )
   (flags (:standard -w +1..62-4-9-44-40-42-48@39@33 -open Simple_utils ))
 )