diff --git a/src/reducers/ModalReducer.js b/src/reducers/ModalReducer.js
index f6e09a51..bd86b456 100644
--- a/src/reducers/ModalReducer.js
+++ b/src/reducers/ModalReducer.js
@@ -57,6 +57,7 @@ export default function modal(state: State = initialState, action: Action): Stat
             if (state.opened && action.device.path === state.device.path && action.device.status === 'occupied') {
                 return initialState;
             }
+
             return state;
 
         case DEVICE.DISCONNECT:
diff --git a/src/utils/__tests__/__snapshots__/ethUtils.test.js.snap b/src/utils/__tests__/__snapshots__/ethUtils.test.js.snap
index 0ffd930d..c95555dd 100644
--- a/src/utils/__tests__/__snapshots__/ethUtils.test.js.snap
+++ b/src/utils/__tests__/__snapshots__/ethUtils.test.js.snap
@@ -1,5 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`eth utils calcGasPrice 1`] = `"89090990901"`;
+
 exports[`eth utils decimalToHex 1`] = `"0"`;
 
 exports[`eth utils decimalToHex 2`] = `"1"`;
@@ -8,4 +10,30 @@ exports[`eth utils decimalToHex 3`] = `"2"`;
 
 exports[`eth utils decimalToHex 4`] = `"64"`;
 
-exports[`eth utils decimalToHex 5`] = `"3e7"`;
+exports[`eth utils decimalToHex 5`] = `"2540be3ff"`;
+
+exports[`eth utils hexToDecimal 1`] = `"9999999999"`;
+
+exports[`eth utils hexToDecimal 2`] = `"100"`;
+
+exports[`eth utils hexToDecimal 3`] = `"2"`;
+
+exports[`eth utils hexToDecimal 4`] = `"1"`;
+
+exports[`eth utils hexToDecimal 5`] = `"0"`;
+
+exports[`eth utils padLeftEven 1`] = `"02540be3ff"`;
+
+exports[`eth utils sanitizeHex 1`] = `"0x02540be3ff"`;
+
+exports[`eth utils sanitizeHex 2`] = `"0x01"`;
+
+exports[`eth utils sanitizeHex 3`] = `"0x02"`;
+
+exports[`eth utils sanitizeHex 4`] = `"0x0100"`;
+
+exports[`eth utils sanitizeHex 5`] = `null`;
+
+exports[`eth utils strip 1`] = `""`;
+
+exports[`eth utils strip 2`] = `"02540be3ff"`;
diff --git a/src/utils/__tests__/__snapshots__/formatUtils.test.js.snap b/src/utils/__tests__/__snapshots__/formatUtils.test.js.snap
new file mode 100644
index 00000000..c9eab582
--- /dev/null
+++ b/src/utils/__tests__/__snapshots__/formatUtils.test.js.snap
@@ -0,0 +1,45 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`format utils btckb2satoshib 1`] = `0`;
+
+exports[`format utils btckb2satoshib 2`] = `100000`;
+
+exports[`format utils btckb2satoshib 3`] = `200000`;
+
+exports[`format utils btckb2satoshib 4`] = `10000000`;
+
+exports[`format utils btckb2satoshib 5`] = `99900000`;
+
+exports[`format utils formatAmount 1`] = `"0 btc"`;
+
+exports[`format utils formatAmount 2`] = `"5e-9 btc"`;
+
+exports[`format utils formatAmount 3`] = `"1e-8 eth"`;
+
+exports[`format utils formatAmount 4`] = `"0.00099999 undefined"`;
+
+exports[`format utils formatTime 1`] = `"No time estimate"`;
+
+exports[`format utils formatTime 2`] = `"1 minutes"`;
+
+exports[`format utils formatTime 3`] = `"2 minutes"`;
+
+exports[`format utils formatTime 4`] = `"1 hour 40 minutes"`;
+
+exports[`format utils formatTime 5`] = `"16 hours 39 minutes"`;
+
+exports[`format utils hexToString 1`] = `""`;
+
+exports[`format utils hexToString 2`] = `"ªªª"`;
+
+exports[`format utils hexToString 3`] = `""`;
+
+exports[`format utils hexToString 4`] = `""`;
+
+exports[`format utils hexToString 5`] = `""`;
+
+exports[`format utils stringToHex 1`] = `"0074006500730074"`;
+
+exports[`format utils stringToHex 2`] = `"0030003000300031"`;
+
+exports[`format utils stringToHex 3`] = `"007400650073007400390039003900390039"`;
diff --git a/src/utils/__tests__/ethUtils.test.js b/src/utils/__tests__/ethUtils.test.js
index 3ff6e2ea..09238617 100644
--- a/src/utils/__tests__/ethUtils.test.js
+++ b/src/utils/__tests__/ethUtils.test.js
@@ -1,11 +1,53 @@
+import BigNumber from 'bignumber.js';
 import * as ethUtils from '../ethUtils';
 
 describe('eth utils', () => {
     it('decimalToHex', () => {
-        const input = [0, 1, 2, 100, 999];
+        const input = [0, 1, 2, 100, 9999999999];
 
         input.forEach((entry) => {
             expect(ethUtils.decimalToHex(entry)).toMatchSnapshot();
         });
     });
+
+    it('hexToDecimal', () => {
+        const input = ['2540be3ff', '64', '2', '1', '0'];
+
+        input.forEach((entry) => {
+            expect(ethUtils.hexToDecimal(entry)).toMatchSnapshot();
+        });
+    });
+
+    it('padLeftEven', () => {
+        const input = ['2540be3ff'];
+
+        input.forEach((entry) => {
+            expect(ethUtils.padLeftEven(entry)).toMatchSnapshot();
+        });
+    });
+
+    it('sanitizeHex', () => {
+        const input = ['0x2540be3ff', '1', '2', '100', 999];
+
+        input.forEach((entry) => {
+            expect(ethUtils.sanitizeHex(entry)).toMatchSnapshot();
+        });
+    });
+
+
+    it('strip', () => {
+        const input = ['0x', '0x2540be3ff'];
+
+        input.forEach((entry) => {
+            expect(ethUtils.strip(entry)).toMatchSnapshot();
+        });
+    });
+
+    it('calcGasPrice', () => {
+        const input = [{ price: new BigNumber(9898998989), limit: '9' }];
+
+        input.forEach((entry) => {
+            expect(ethUtils.calcGasPrice(entry.price, entry.limit)).toMatchSnapshot();
+        });
+    });
 });