diff --git a/substrate/frame/beefy-mmr/src/mock.rs b/substrate/frame/beefy-mmr/src/mock.rs
index 9d1ece7a1d8ec..d59c219d3e71e 100644
--- a/substrate/frame/beefy-mmr/src/mock.rs
+++ b/substrate/frame/beefy-mmr/src/mock.rs
@@ -90,6 +90,8 @@ impl pallet_mmr::Config for Test {
 
 	type OnNewRoot = pallet_beefy_mmr::DepositBeefyDigest<Test>;
 
+	type BlockHashProvider = pallet_mmr::DefaultBlockHashProvider<Test>;
+
 	type WeightInfo = ();
 }