diff --git a/mononoke_types/src/lib.rs b/mononoke_types/src/lib.rs
index 1909a71a99..0c62abee1a 100644
--- a/mononoke_types/src/lib.rs
+++ b/mononoke_types/src/lib.rs
@@ -7,8 +7,6 @@
 //! Base types used throughout Mononoke.
 
 #![deny(warnings)]
-// The allow(dead_code) is temporary until Thrift serialization is done.
-#![allow(dead_code)]
 #![feature(const_fn)]
 
 pub mod blob;
diff --git a/mononoke_types/src/typed_hash.rs b/mononoke_types/src/typed_hash.rs
index caed285e68..0df7d1ad3d 100644
--- a/mononoke_types/src/typed_hash.rs
+++ b/mononoke_types/src/typed_hash.rs
@@ -99,6 +99,7 @@ macro_rules! impl_typed_hash {
                 }
             }
 
+            #[cfg(test)]
             pub(crate) fn from_byte_array(arr: [u8; 32]) -> Self {
                 $typed(Blake2::from_byte_array(arr))
             }