diff --git a/node/core/runtime-api/src/tests.rs b/node/core/runtime-api/src/tests.rs
index 18906e196b82..572aa4fe2aac 100644
--- a/node/core/runtime-api/src/tests.rs
+++ b/node/core/runtime-api/src/tests.rs
@@ -22,8 +22,8 @@ use polkadot_node_subsystem_test_helpers as test_helpers;
 use polkadot_primitives::v1::{
 	AuthorityDiscoveryId, CandidateEvent, CommittedCandidateReceipt, CoreState, GroupRotationInfo,
 	Id as ParaId, InboundDownwardMessage, InboundHrmpMessage, OccupiedCoreAssumption,
-	PersistedValidationData, SessionIndex, SessionInfo, ValidationCode, ValidationCodeHash,
-	ValidatorId, ValidatorIndex,
+	PersistedValidationData, ScrapedImportDisputesAndBackingVotes, SessionIndex, SessionInfo,
+	ValidationCode, ValidationCodeHash, ValidatorId, ValidatorIndex,
 };
 use sp_core::testing::TaskExecutor;
 use std::{
@@ -149,6 +149,10 @@ sp_api::mock_impl_runtime_apis! {
 		) -> Option<ValidationCode> {
 			self.validation_code_by_hash.get(&hash).map(|c| c.clone())
 		}
+
+		fn imported_on_chain_disputes(&self) -> Option<ScrapedImportDisputesAndBackingVotes> {
+			None
+		}
 	}
 
 	impl BabeApi<Block> for MockRuntimeApi {