diff --git a/rskj-core/src/main/java/org/ethereum/facade/EthereumImpl.java b/rskj-core/src/main/java/org/ethereum/facade/EthereumImpl.java
index 247602f1fa8..8b3cec0a317 100644
--- a/rskj-core/src/main/java/org/ethereum/facade/EthereumImpl.java
+++ b/rskj-core/src/main/java/org/ethereum/facade/EthereumImpl.java
@@ -37,7 +37,7 @@ public class EthereumImpl implements Ethereum {
     private final CompositeEthereumListener compositeEthereumListener;
     private final Blockchain blockchain;
     private final GasPriceTracker gasPriceTracker;
-    private final Double minGasPriceMultiplier;
+    private final double minGasPriceMultiplier;
 
     public EthereumImpl(
             ChannelManager channelManager,
@@ -45,7 +45,7 @@ public EthereumImpl(
             CompositeEthereumListener compositeEthereumListener,
             Blockchain blockchain,
             GasPriceTracker gasPriceTracker,
-            Double minGasPriceMultiplier) {
+            double minGasPriceMultiplier) {
         this.channelManager = channelManager;
         this.transactionGateway = transactionGateway;
 
diff --git a/rskj-core/src/test/java/org/ethereum/facade/EthereumImplTest.java b/rskj-core/src/test/java/org/ethereum/facade/EthereumImplTest.java
index 6e9ee25bc19..1502e7069cc 100644
--- a/rskj-core/src/test/java/org/ethereum/facade/EthereumImplTest.java
+++ b/rskj-core/src/test/java/org/ethereum/facade/EthereumImplTest.java
@@ -1,3 +1,20 @@
+/*
+ * This file is part of RskJ
+ * Copyright (C) 2023 RSK Labs Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package org.ethereum.facade;
 
 import co.rsk.core.Coin;
@@ -21,17 +38,17 @@ void getGasPrice_returns_GasPriceTrackerValue_when_feeMarketWorking_is_true() {
         when(gasPriceTracker.isFeeMarketWorking()).thenReturn(true);
         when(gasPriceTracker.getGasPrice()).thenReturn(Coin.valueOf(10));
 
-        Ethereum ethereum = new EthereumImpl(null, null, new CompositeEthereumListener(), null, gasPriceTracker, null);
+        Ethereum ethereum = new EthereumImpl(null, null, new CompositeEthereumListener(), null, gasPriceTracker, 1);
         Coin price = ethereum.getGasPrice();
 
         assertEquals(10, price.asBigInteger().intValue());
     }
 
     @Test
-    void getGasPrice_returns_correctedBestBlockValue_when_feeMarketWorking_is_false(){
+    void getGasPrice_returns_correctedBestBlockValue_when_feeMarketWorking_is_false() {
         GasPriceTracker gasPriceTracker = mock(GasPriceTracker.class);
         Blockchain blockchain = mock(Blockchain.class);
-        Double minGasPriceMultiplier = 1.2;
+        double minGasPriceMultiplier = 1.2;
         Block bestBlock = mock(Block.class);
 
         when(gasPriceTracker.isFeeMarketWorking()).thenReturn(false);