diff --git a/cli/candidate_test.go b/cli/candidate_test.go
index 262e05e5a..a85c68f4d 100644
--- a/cli/candidate_test.go
+++ b/cli/candidate_test.go
@@ -21,7 +21,7 @@ func TestRegisterCandidate(t *testing.T) {
 		"--wallet", validatorWallet,
 		"--from", validatorAddr,
 		"NEO:"+validatorPriv.Address()+":10",
-		"GAS:"+validatorPriv.Address()+":100")
+		"GAS:"+validatorPriv.Address()+":10000")
 	e.checkTxPersisted(t)
 
 	e.In.WriteString("one\r")
diff --git a/cli/wallet/validator.go b/cli/wallet/validator.go
index dbc5f1d33..50b09d38f 100644
--- a/cli/wallet/validator.go
+++ b/cli/wallet/validator.go
@@ -71,14 +71,14 @@ func newValidatorCommands() []cli.Command {
 }
 
 func handleRegister(ctx *cli.Context) error {
-	return handleCandidate(ctx, "registerCandidate")
+	return handleCandidate(ctx, "registerCandidate", 1001*100000000) // registering costs 1000 GAS
 }
 
 func handleUnregister(ctx *cli.Context) error {
-	return handleCandidate(ctx, "unregisterCandidate")
+	return handleCandidate(ctx, "unregisterCandidate", -1)
 }
 
-func handleCandidate(ctx *cli.Context, method string) error {
+func handleCandidate(ctx *cli.Context, method string, sysGas int64) error {
 	wall, err := openWallet(ctx.String("wallet"))
 	if err != nil {
 		return cli.NewExitError(err, 1)
@@ -108,7 +108,7 @@ func handleCandidate(ctx *cli.Context, method string) error {
 	w := io.NewBufBinWriter()
 	emit.AppCall(w.BinWriter, neoContractHash, method, callflag.WriteStates, acc.PrivateKey().PublicKey().Bytes())
 	emit.Opcodes(w.BinWriter, opcode.ASSERT)
-	tx, err := c.CreateTxFromScript(w.Bytes(), acc, -1, int64(gas), transaction.Signer{
+	tx, err := c.CreateTxFromScript(w.Bytes(), acc, sysGas, int64(gas), transaction.Signer{
 		Account: acc.Contract.ScriptHash(),
 		Scopes:  transaction.CalledByEntry,
 	})
diff --git a/pkg/consensus/consensus_test.go b/pkg/consensus/consensus_test.go
index f67ef00e8..39f74e224 100644
--- a/pkg/consensus/consensus_test.go
+++ b/pkg/consensus/consensus_test.go
@@ -59,7 +59,7 @@ func initServiceNextConsensus(t *testing.T, newAcc *wallet.Account, offset uint3
 		acc.Contract.ScriptHash().BytesBE(), newPriv.GetScriptHash().BytesBE(), int64(native.NEOTotalSupply), nil)
 	emit.Opcodes(w.BinWriter, opcode.ASSERT)
 	emit.AppCall(w.BinWriter, bc.UtilityTokenHash(), "transfer", callflag.All,
-		acc.Contract.ScriptHash().BytesBE(), newPriv.GetScriptHash().BytesBE(), int64(1_000_000_000), nil)
+		acc.Contract.ScriptHash().BytesBE(), newPriv.GetScriptHash().BytesBE(), int64(10000_000_000_000), nil)
 	emit.Opcodes(w.BinWriter, opcode.ASSERT)
 	require.NoError(t, w.Err)
 
@@ -78,7 +78,7 @@ func initServiceNextConsensus(t *testing.T, newAcc *wallet.Account, offset uint3
 	emit.AppCall(w.BinWriter, bc.GoverningTokenHash(), "registerCandidate", callflag.All, newPriv.PublicKey().Bytes())
 	require.NoError(t, w.Err)
 
-	tx = transaction.New(netmode.UnitTestNet, w.Bytes(), 20_000_000)
+	tx = transaction.New(netmode.UnitTestNet, w.Bytes(), 1001_00000000)
 	tx.ValidUntilBlock = bc.BlockHeight() + 1
 	tx.NetworkFee = 20_000_000
 	tx.Signers = []transaction.Signer{{Scopes: transaction.Global, Account: newPriv.GetScriptHash()}}
diff --git a/pkg/core/native/native_neo.go b/pkg/core/native/native_neo.go
index 43ebcc201..40967d0e2 100644
--- a/pkg/core/native/native_neo.go
+++ b/pkg/core/native/native_neo.go
@@ -115,7 +115,7 @@ func newNEO() *NEO {
 
 	desc = newDescriptor("registerCandidate", smartcontract.BoolType,
 		manifest.NewParameter("pubkey", smartcontract.ByteArrayType))
-	md = newMethodAndPrice(n.registerCandidate, 5000000, callflag.WriteStates)
+	md = newMethodAndPrice(n.registerCandidate, 1000_00000000, callflag.WriteStates)
 	n.AddMethod(md, desc)
 
 	desc = newDescriptor("unregisterCandidate", smartcontract.BoolType,