diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go
index a43cb9467..c7efca440 100644
--- a/accounts/abi/bind/backends/simulated.go
+++ b/accounts/abi/bind/backends/simulated.go
@@ -195,7 +195,7 @@ func (b *SimulatedBackend) StorageAt(ctx context.Context, contract common.Addres
 }
 
 // TransactionReceipt returns the receipt of a transaction.
-func (b *SimulatedBackend) TransactionReceipt(_ context.Context, txHash common.Hash) (*types.Receipt, error) {
+func (b *SimulatedBackend) TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -207,7 +207,7 @@ func (b *SimulatedBackend) TransactionReceipt(_ context.Context, txHash common.H
 // blockchain. The isPending return value indicates whether the transaction has been
 // mined yet. Note that the transaction may not be part of the canonical chain even if
 // it's not pending.
-func (b *SimulatedBackend) TransactionByHash(_ context.Context, txHash common.Hash) (*types.Transaction, bool, error) {
+func (b *SimulatedBackend) TransactionByHash(ctx context.Context, txHash common.Hash) (*types.Transaction, bool, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -223,7 +223,7 @@ func (b *SimulatedBackend) TransactionByHash(_ context.Context, txHash common.Ha
 }
 
 // BlockByHash retrieves a block based on the block hash.
-func (b *SimulatedBackend) BlockByHash(_ context.Context, hash common.Hash) (*types.Block, error) {
+func (b *SimulatedBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -250,7 +250,7 @@ func (b *SimulatedBackend) BlockByNumber(ctx context.Context, number *big.Int) (
 
 // blockByNumberNoLock retrieves a block from the database by number, caching it
 // (associated with its hash) if found without Lock.
-func (b *SimulatedBackend) blockByNumberNoLock(_ context.Context, number *big.Int) (*types.Block, error) {
+func (b *SimulatedBackend) blockByNumberNoLock(ctx context.Context, number *big.Int) (*types.Block, error) {
 	if number == nil || number.Cmp(b.pendingBlock.Number()) == 0 {
 		return b.blockchain.CurrentBlock(), nil
 	}
@@ -264,7 +264,7 @@ func (b *SimulatedBackend) blockByNumberNoLock(_ context.Context, number *big.In
 }
 
 // HeaderByHash returns a block header from the current canonical chain.
-func (b *SimulatedBackend) HeaderByHash(_ context.Context, hash common.Hash) (*types.Header, error) {
+func (b *SimulatedBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -282,7 +282,7 @@ func (b *SimulatedBackend) HeaderByHash(_ context.Context, hash common.Hash) (*t
 
 // HeaderByNumber returns a block header from the current canonical chain. If number is
 // nil, the latest known header is returned.
-func (b *SimulatedBackend) HeaderByNumber(_ context.Context, block *big.Int) (*types.Header, error) {
+func (b *SimulatedBackend) HeaderByNumber(ctx context.Context, block *big.Int) (*types.Header, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -294,7 +294,7 @@ func (b *SimulatedBackend) HeaderByNumber(_ context.Context, block *big.Int) (*t
 }
 
 // TransactionCount returns the number of transactions in a given block.
-func (b *SimulatedBackend) TransactionCount(_ context.Context, blockHash common.Hash) (uint, error) {
+func (b *SimulatedBackend) TransactionCount(ctx context.Context, blockHash common.Hash) (uint, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -311,7 +311,7 @@ func (b *SimulatedBackend) TransactionCount(_ context.Context, blockHash common.
 }
 
 // TransactionInBlock returns the transaction for a specific block at a specific index.
-func (b *SimulatedBackend) TransactionInBlock(_ context.Context, blockHash common.Hash, index uint) (*types.Transaction, error) {
+func (b *SimulatedBackend) TransactionInBlock(ctx context.Context, blockHash common.Hash, index uint) (*types.Transaction, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -338,7 +338,7 @@ func (b *SimulatedBackend) TransactionInBlock(_ context.Context, blockHash commo
 }
 
 // PendingCodeAt returns the code associated with an account in the pending state.
-func (b *SimulatedBackend) PendingCodeAt(_ context.Context, contract common.Address) ([]byte, error) {
+func (b *SimulatedBackend) PendingCodeAt(ctx context.Context, contract common.Address) ([]byte, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -417,7 +417,7 @@ func (b *SimulatedBackend) PendingCallContract(ctx context.Context, call ethereu
 
 // PendingNonceAt implements PendingStateReader.PendingNonceAt, retrieving
 // the nonce currently pending for the account.
-func (b *SimulatedBackend) PendingNonceAt(_ context.Context, account common.Address) (uint64, error) {
+func (b *SimulatedBackend) PendingNonceAt(ctx context.Context, account common.Address) (uint64, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -426,7 +426,7 @@ func (b *SimulatedBackend) PendingNonceAt(_ context.Context, account common.Addr
 
 // SuggestGasPrice implements ContractTransactor.SuggestGasPrice. Since the simulated
 // chain doesn't have miners, we just return a gas price of 1 for any call.
-func (b *SimulatedBackend) SuggestGasPrice(_ context.Context) (*big.Int, error) {
+func (b *SimulatedBackend) SuggestGasPrice(ctx context.Context) (*big.Int, error) {
 	return big.NewInt(1), nil
 }
 
@@ -525,7 +525,7 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
 
 // callContract implements common code between normal and pending contract calls.
 // state is modified during execution, make sure to copy it if necessary.
-func (b *SimulatedBackend) callContract(_ context.Context, call ethereum.CallMsg, block *types.Block, stateDB *state.StateDB) (*core.ExecutionResult, error) {
+func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallMsg, block *types.Block, stateDB *state.StateDB) (*core.ExecutionResult, error) {
 	// Ensure message is initialized properly.
 	if call.GasPrice == nil {
 		call.GasPrice = big.NewInt(1)
@@ -553,7 +553,7 @@ func (b *SimulatedBackend) callContract(_ context.Context, call ethereum.CallMsg
 
 // SendTransaction updates the pending block to include the given transaction.
 // It panics if the transaction is invalid.
-func (b *SimulatedBackend) SendTransaction(_ context.Context, tx *types.Transaction) error {
+func (b *SimulatedBackend) SendTransaction(ctx context.Context, tx *types.Transaction) error {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -615,7 +615,7 @@ func (b *SimulatedBackend) FilterLogs(ctx context.Context, query ethereum.Filter
 
 // SubscribeFilterLogs creates a background log filtering operation, returning a
 // subscription immediately, which can be used to stream the found events.
-func (b *SimulatedBackend) SubscribeFilterLogs(_ context.Context, query ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error) {
+func (b *SimulatedBackend) SubscribeFilterLogs(ctx context.Context, query ethereum.FilterQuery, ch chan<- types.Log) (ethereum.Subscription, error) {
 	// Subscribe to contract events
 	sink := make(chan []*types.Log)
 
@@ -648,7 +648,7 @@ func (b *SimulatedBackend) SubscribeFilterLogs(_ context.Context, query ethereum
 }
 
 // SubscribeNewHead returns an event subscription for a new header.
-func (b *SimulatedBackend) SubscribeNewHead(_ context.Context, ch chan<- *types.Header) (ethereum.Subscription, error) {
+func (b *SimulatedBackend) SubscribeNewHead(ctx context.Context, ch chan<- *types.Header) (ethereum.Subscription, error) {
 	// subscribe to a new head
 	sink := make(chan *types.Header)
 	sub := b.events.SubscribeNewHeads(sink)
@@ -724,18 +724,18 @@ type filterBackend struct {
 func (fb *filterBackend) ChainDb() ethdb.Database  { return fb.db }
 func (fb *filterBackend) EventMux() *event.TypeMux { panic("not supported") }
 
-func (fb *filterBackend) HeaderByNumber(_ context.Context, block rpc.BlockNumber) (*types.Header, error) {
+func (fb *filterBackend) HeaderByNumber(ctx context.Context, block rpc.BlockNumber) (*types.Header, error) {
 	if block == rpc.LatestBlockNumber {
 		return fb.bc.CurrentHeader(), nil
 	}
 	return fb.bc.GetHeaderByNumber(uint64(block.Int64())), nil
 }
 
-func (fb *filterBackend) HeaderByHash(_ context.Context, hash common.Hash) (*types.Header, error) {
+func (fb *filterBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
 	return fb.bc.GetHeaderByHash(hash), nil
 }
 
-func (fb *filterBackend) GetReceipts(_ context.Context, hash common.Hash) (types.Receipts, error) {
+func (fb *filterBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
 	number := rawdb.ReadHeaderNumber(fb.db, hash)
 	if number == nil {
 		return nil, nil
@@ -743,7 +743,7 @@ func (fb *filterBackend) GetReceipts(_ context.Context, hash common.Hash) (types
 	return rawdb.ReadReceipts(fb.db, hash, *number, fb.bc.Config()), nil
 }
 
-func (fb *filterBackend) GetLogs(_ context.Context, hash common.Hash) ([][]*types.Log, error) {
+func (fb *filterBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
 	number := rawdb.ReadHeaderNumber(fb.db, hash)
 	if number == nil {
 		return nil, nil
@@ -759,7 +759,7 @@ func (fb *filterBackend) GetLogs(_ context.Context, hash common.Hash) ([][]*type
 	return logs, nil
 }
 
-func (fb *filterBackend) SubscribeNewTxsEvent(_ chan<- core.NewTxsEvent) event.Subscription {
+func (fb *filterBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
 	return nullSubscription()
 }
 
@@ -775,13 +775,13 @@ func (fb *filterBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscr
 	return fb.bc.SubscribeLogsEvent(ch)
 }
 
-func (fb *filterBackend) SubscribePendingLogsEvent(_ chan<- []*types.Log) event.Subscription {
+func (fb *filterBackend) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription {
 	return nullSubscription()
 }
 
 func (fb *filterBackend) BloomStatus() (uint64, uint64) { return 4096, 0 }
 
-func (fb *filterBackend) ServiceFilter(_ context.Context, _ *bloombits.MatcherSession) {
+func (fb *filterBackend) ServiceFilter(ctx context.Context, ms *bloombits.MatcherSession) {
 	panic("not supported")
 }
 
diff --git a/accounts/abi/bind/backends/simulated_test.go b/accounts/abi/bind/backends/simulated_test.go
index 2dffe26f6..e2597cca0 100644
--- a/accounts/abi/bind/backends/simulated_test.go
+++ b/accounts/abi/bind/backends/simulated_test.go
@@ -1086,12 +1086,12 @@ func TestSimulatedBackend_CallContractRevert(t *testing.T) {
 				t.Errorf("result from %v was not nil: %v", key, res)
 			}
 			if val != nil {
-				rErr, ok := err.(*revertError)
+				rerr, ok := err.(*revertError)
 				if !ok {
 					t.Errorf("expect revert error")
 				}
-				if rErr.Error() != "execution reverted: "+val.(string) {
-					t.Errorf("error was malformed: got %v want %v", rErr.Error(), val)
+				if rerr.Error() != "execution reverted: "+val.(string) {
+					t.Errorf("error was malformed: got %v want %v", rerr.Error(), val)
 				}
 			} else {
 				// revert(0x0,0x0)