diff --git a/nano/core_test/block_store.cpp b/nano/core_test/block_store.cpp
index b6b143de..26aa654c 100644
--- a/nano/core_test/block_store.cpp
+++ b/nano/core_test/block_store.cpp
@@ -1431,7 +1431,6 @@ TEST (mdb_block_store, sideband_height)
 TEST (block_store, peers)
 {
 	nano::logger_mt logger;
-	auto init (false);
 	auto store = nano::make_store (logger, nano::unique_path ());
 	ASSERT_TRUE (!store->init_error ());
 
@@ -1559,7 +1558,6 @@ TEST (mdb_block_store, upgrade_v13_v14)
 	{
 		nano::logger_mt logger;
 		nano::genesis genesis;
-		auto error (false);
 		nano::mdb_store store (logger, path);
 		auto transaction (store.tx_begin_write ());
 		nano::rep_weights rep_weights;
@@ -1613,7 +1611,6 @@ TEST (mdb_block_store, upgrade_v14_v15)
 	{
 		nano::logger_mt logger;
 		nano::genesis genesis;
-		auto error (false);
 		nano::mdb_store store (logger, path);
 		auto transaction (store.tx_begin_write ());
 		nano::rep_weights rep_weights;
@@ -1710,7 +1707,6 @@ TEST (block_store, confirmation_height)
 {
 	auto path (nano::unique_path ());
 	nano::logger_mt logger;
-	auto error (false);
 	nano::mdb_store store (logger, path);
 
 	nano::account account1 (0);
@@ -1853,6 +1849,7 @@ TEST (block_store, rocksdb_force_test_env_variable)
 	// Set environment variable
 	constexpr auto env_var = "TEST_USE_ROCKSDB";
 	auto value = std::getenv (env_var);
+	(void)value;
 
 	auto store = nano::make_store (logger, nano::unique_path ());
 
diff --git a/nano/core_test/wallet.cpp b/nano/core_test/wallet.cpp
index 5e9d8641..d4ae31c4 100644
--- a/nano/core_test/wallet.cpp
+++ b/nano/core_test/wallet.cpp
@@ -1164,6 +1164,7 @@ TEST (wallet, work_watcher_removed)
 	nano::node_config node_config (24000, system.logging);
 	node_config.work_watcher_period = 1s;
 	auto & node = *system.add_node (node_config);
+	(void)node;
 	auto & wallet (*system.wallet (0));
 	wallet.insert_adhoc (nano::test_genesis_key.prv);
 	nano::keypair key;
diff --git a/nano/node/json_handler.cpp b/nano/node/json_handler.cpp
index 5b19ac7b..7da8579a 100644
--- a/nano/node/json_handler.cpp
+++ b/nano/node/json_handler.cpp
@@ -3853,6 +3853,7 @@ void nano::json_handler::version ()
 void nano::json_handler::validate_account_number ()
 {
 	auto account (account_impl ());
+	(void)account;
 	response_l.put ("valid", ec ? "0" : "1");
 	ec = std::error_code (); // error is just invalid account
 	response_errors ();
diff --git a/nano/node/repcrawler.cpp b/nano/node/repcrawler.cpp
index 410d187a..472ea11e 100644
--- a/nano/node/repcrawler.cpp
+++ b/nano/node/repcrawler.cpp
@@ -183,7 +183,6 @@ void nano::rep_crawler::on_rep_request (std::shared_ptr<nano::transport::channel
 {
 	nano::lock_guard<std::mutex> lock (probable_reps_mutex);
 
-	using probable_rep_itr_t = probably_rep_t::index<tag_channel_ref>::type::iterator;
 	probably_rep_t::index<tag_channel_ref>::type & channel_ref_index = probable_reps.get<tag_channel_ref> ();
 
 	// Find and update the timestamp on all reps available on the endpoint (a single host may have multiple reps)
diff --git a/nano/node/wallet.cpp b/nano/node/wallet.cpp
index 91d1d651..7a457d35 100644
--- a/nano/node/wallet.cpp
+++ b/nano/node/wallet.cpp
@@ -1429,7 +1429,6 @@ void nano::work_watcher::watching (nano::qualified_root const & root_a, std::sha
 			if (watcher_l->watched.find (root_a) != watcher_l->watched.end ()) // not yet confirmed or cancelled
 			{
 				lock.unlock ();
-				bool updated_l{ false };
 				uint64_t difficulty (0);
 				auto root_l (block_a->root ());
 				nano::work_validate (root_l, block_a->block_work (), &difficulty);