diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 33842ff6c48e..82531bef7383 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -32,7 +32,6 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/common/math"
-	"github.com/ethereum/go-ethereum/consensus/clique"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/consensus/misc"
 	"github.com/ethereum/go-ethereum/core"
@@ -1875,45 +1874,6 @@ func (api *PublicDebugAPI) GetBlockRlp(ctx context.Context, number uint64) (hexu
 	return rlp.EncodeToBytes(block)
 }
 
-// TestSignCliqueBlock fetches the given block number, and attempts to sign it as a clique header with the
-// given address, returning the address of the recovered signature
-//
-// This is a temporary method to debug the externalsigner integration,
-// TODO: Remove this method when the integration is mature
-func (api *PublicDebugAPI) TestSignCliqueBlock(ctx context.Context, address common.Address, number uint64) (common.Address, error) {
-	block, _ := api.b.BlockByNumber(ctx, rpc.BlockNumber(number))
-	if block == nil {
-		return common.Address{}, fmt.Errorf("block #%d not found", number)
-	}
-	header := block.Header()
-	header.Extra = make([]byte, 32+65)
-	encoded := clique.CliqueRLP(header)
-
-	// Look up the wallet containing the requested signer
-	account := accounts.Account{Address: address}
-	wallet, err := api.b.AccountManager().Find(account)
-	if err != nil {
-		return common.Address{}, err
-	}
-
-	signature, err := wallet.SignData(account, accounts.MimetypeClique, encoded)
-	if err != nil {
-		return common.Address{}, err
-	}
-	sealHash := clique.SealHash(header).Bytes()
-	log.Info("test signing of clique block",
-		"Sealhash", fmt.Sprintf("%x", sealHash),
-		"signature", fmt.Sprintf("%x", signature))
-	pubkey, err := crypto.Ecrecover(sealHash, signature)
-	if err != nil {
-		return common.Address{}, err
-	}
-	var signer common.Address
-	copy(signer[:], crypto.Keccak256(pubkey[1:])[12:])
-
-	return signer, nil
-}
-
 // PrintBlock retrieves a block and returns its pretty printed form.
 func (api *PublicDebugAPI) PrintBlock(ctx context.Context, number uint64) (string, error) {
 	block, _ := api.b.BlockByNumber(ctx, rpc.BlockNumber(number))
diff --git a/internal/web3ext/web3ext.go b/internal/web3ext/web3ext.go
index 4b7a196e4726..c8c4d4e40dd0 100644
--- a/internal/web3ext/web3ext.go
+++ b/internal/web3ext/web3ext.go
@@ -233,12 +233,6 @@ web3._extend({
 			call: 'debug_getBlockRlp',
 			params: 1
 		}),
-		new web3._extend.Method({
-			name: 'testSignCliqueBlock',
-			call: 'debug_testSignCliqueBlock',
-			params: 2,
-			inputFormatter: [web3._extend.formatters.inputAddressFormatter, null],
-		}),
 		new web3._extend.Method({
 			name: 'setHead',
 			call: 'debug_setHead',