diff --git a/tests/core_proxy/core_proxy.h b/tests/core_proxy/core_proxy.h
index 0f6d6571..995b0c65 100644
--- a/tests/core_proxy/core_proxy.h
+++ b/tests/core_proxy/core_proxy.h
@@ -87,5 +87,6 @@ namespace tests
     bool prepare_handle_incoming_blocks(const std::list<cryptonote::block_complete_entry>  &blocks) { return true; }
     bool cleanup_handle_incoming_blocks(bool force_sync = false) { return true; }
     uint64_t get_target_blockchain_height() const { return 1; }
+    size_t get_block_sync_size() const { return BLOCKS_SYNCHRONIZING_DEFAULT_COUNT; }
   };
 }
diff --git a/tests/unit_tests/ban.cpp b/tests/unit_tests/ban.cpp
index a5ce244d..85b0298b 100644
--- a/tests/unit_tests/ban.cpp
+++ b/tests/unit_tests/ban.cpp
@@ -62,6 +62,7 @@ public:
   bool prepare_handle_incoming_blocks(const std::list<cryptonote::block_complete_entry>  &blocks) { return true; }
   bool cleanup_handle_incoming_blocks(bool force_sync = false) { return true; }
   uint64_t get_target_blockchain_height() const { return 1; }
+  size_t get_block_sync_size() const { return BLOCKS_SYNCHRONIZING_DEFAULT_COUNT; }
 };
 
 typedef nodetool::node_server<cryptonote::t_cryptonote_protocol_handler<test_core>> Server;