diff --git a/src/common/WiFiSettings/WiFiForm.js b/src/common/WiFiSettings/WiFiForm.js
index ac04184..e0d203a 100644
--- a/src/common/WiFiSettings/WiFiForm.js
+++ b/src/common/WiFiSettings/WiFiForm.js
@@ -38,12 +38,12 @@ WiFiForm.defaultProps = {
 export default function WiFiForm({
     formData, formErrors, setFormValue, hasGuestNetwork, disabled,
 }) {
-    return formData.devices.map((device, idx) => (
+    return formData.devices.map((device, index) => (
         <DeviceForm
             key={device.id}
             formData={device}
-            deviceNumber={idx}
-            formErrors={(formErrors || [])[idx]}
+            deviceIndex={index}
+            formErrors={(formErrors || [])[index]}
             setFormValue={setFormValue}
             hasGuestNetwork={hasGuestNetwork}
             disabled={disabled}
@@ -66,7 +66,7 @@ DeviceForm.propTypes = {
     formErrors: PropTypes.object.isRequired,
     setFormValue: PropTypes.func.isRequired,
     hasGuestNetwork: PropTypes.bool,
-    deviceNumber: PropTypes.number,
+    deviceIndex: PropTypes.number,
 };
 
 DeviceForm.defaultProps = {
@@ -75,7 +75,7 @@ DeviceForm.defaultProps = {
 };
 
 function DeviceForm({
-    formData, formErrors, setFormValue, hasGuestNetwork, deviceNumber, ...props
+    formData, formErrors, setFormValue, hasGuestNetwork, deviceIndex, ...props
 }) {
     const deviceID = formData.id;
     return (
@@ -86,7 +86,7 @@ function DeviceForm({
                 checked={formData.enabled}
 
                 onChange={setFormValue(
-                    (value) => ({ devices: { [deviceNumber]: { enabled: { $set: value } } } }),
+                    (value) => ({ devices: { [deviceIndex]: { enabled: { $set: value } } } }),
                 )}
 
                 {...props}
@@ -102,7 +102,7 @@ function DeviceForm({
                             onChange={setFormValue(
                                 (value) => ({
                                     devices: {
-                                        [deviceNumber]: {
+                                        [deviceIndex]: {
                                             SSID: { $set: value },
                                         },
                                     },
@@ -129,7 +129,7 @@ function DeviceForm({
 
                             onChange={setFormValue(
                                 (value) => (
-                                    { devices: { [deviceNumber]: { password: { $set: value } } } }
+                                    { devices: { [deviceIndex]: { password: { $set: value } } } }
                                 ),
                             )}
 
@@ -143,7 +143,7 @@ function DeviceForm({
 
                             onChange={setFormValue(
                                 (value) => (
-                                    { devices: { [deviceNumber]: { hidden: { $set: value } } } }
+                                    { devices: { [deviceIndex]: { hidden: { $set: value } } } }
                                 ),
                             )}
 
@@ -160,7 +160,7 @@ function DeviceForm({
                             onChange={setFormValue(
                                 (value) => ({
                                     devices: {
-                                        [deviceNumber]: {
+                                        [deviceIndex]: {
                                             hwmode: { $set: value },
                                             channel: { $set: "0" },
                                         },
@@ -179,7 +179,7 @@ function DeviceForm({
 
                             onChange={setFormValue(
                                 (value) => (
-                                    { devices: { [deviceNumber]: { htmode: { $set: value } } } }
+                                    { devices: { [deviceIndex]: { htmode: { $set: value } } } }
                                 ),
                             )}
 
@@ -193,7 +193,7 @@ function DeviceForm({
 
                             onChange={setFormValue(
                                 (value) => (
-                                    { devices: { [deviceNumber]: { channel: { $set: value } } } }
+                                    { devices: { [deviceIndex]: { channel: { $set: value } } } }
                                 ),
                             )}
 
@@ -202,7 +202,7 @@ function DeviceForm({
 
                         {hasGuestNetwork && (
                             <WifiGuestForm
-                                formData={{ id: deviceNumber, ...formData.guest_wifi }}
+                                formData={{ id: deviceIndex, ...formData.guest_wifi }}
                                 formErrors={formErrors.guest_wifi || {}}
 
                                 setFormValue={setFormValue}
diff --git a/src/common/WiFiSettings/WiFiSettings.js b/src/common/WiFiSettings/WiFiSettings.js
index 1d20c9c..9f7fa15 100644
--- a/src/common/WiFiSettings/WiFiSettings.js
+++ b/src/common/WiFiSettings/WiFiSettings.js
@@ -64,7 +64,7 @@ function prepDataToSubmit(formData) {
     return formData;
 }
 
-function validator(formData) {
+export function validator(formData) {
     const formErrors = formData.devices.map(
         (device) => {
             if (!device.enabled) return {};
diff --git a/src/common/WiFiSettings/__tests__/WiFiSettings.test.js b/src/common/WiFiSettings/__tests__/WiFiSettings.test.js
index 1622fba..2f4d0eb 100644
--- a/src/common/WiFiSettings/__tests__/WiFiSettings.test.js
+++ b/src/common/WiFiSettings/__tests__/WiFiSettings.test.js
@@ -13,8 +13,8 @@ import { fireEvent, render, wait } from "customTestRender";
 import { WebSockets } from "webSockets/WebSockets";
 import { mockJSONError } from "testUtils/network";
 
-import { wifiSettingsFixture } from "./__fixtures__/wifiSettings";
-import { WiFiSettings } from "../WiFiSettings";
+import { wifiSettingsFixture, oneDevice, twoDevices, threeDevices } from "./__fixtures__/wifiSettings";
+import { WiFiSettings, validator } from "../WiFiSettings";
 
 describe("<WiFiSettings/>", () => {
     let firstRender;
@@ -159,4 +159,18 @@ describe("<WiFiSettings/>", () => {
         };
         expect(mockAxios.post).toHaveBeenCalledWith(endpoint, data, expect.anything());
     });
+
+    it("Validator function using regex for one device", () => {    
+        expect(validator(oneDevice)).toEqual(null);      
+    });
+
+    it("Validator function using regex for two devices", () => {
+        const twoDevicesFormErrors = [{SSID: "SSID can't be empty"}, {}];    
+        expect(validator(twoDevices)).toEqual(twoDevicesFormErrors);
+    });
+
+    it("Validator function using regex for three devices", () => {
+        const threeDevicesFormErrors = [{}, {}, {password: "Password must contain at least 8 symbols"}];    
+        expect(validator(threeDevices)).toEqual(threeDevicesFormErrors);
+    });
 });
diff --git a/src/common/WiFiSettings/__tests__/__fixtures__/wifiSettings.js b/src/common/WiFiSettings/__tests__/__fixtures__/wifiSettings.js
index 71c8eb2..4ee0091 100644
--- a/src/common/WiFiSettings/__tests__/__fixtures__/wifiSettings.js
+++ b/src/common/WiFiSettings/__tests__/__fixtures__/wifiSettings.js
@@ -316,3 +316,85 @@ export function wifiSettingsFixture() {
         ],
     };
 }
+const oneDevice = {
+    devices: [
+        {
+            SSID: "Turris1",
+            channel: 60,
+            enabled: true,
+            guest_wifi: { enabled: false },
+            hidden: false,
+            htmode: "HT40",
+            hwmode: "11a",
+            id: 0,
+            password: "TestPass"
+        }
+    ]
+};
+
+const twoDevices = {
+    devices: [
+        {
+            SSID: "",
+            channel: 60,
+            enabled: true,
+            guest_wifi: { enabled: false },
+            hidden: false,
+            htmode: "HT40",
+            hwmode: "11a",
+            id: 0,
+            password: "TestPass"
+        },
+        {
+            SSID: "Turris2",
+            channel: 60,
+            enabled: true,
+            guest_wifi: { enabled: false },
+            hidden: false,
+            htmode: "HT40",
+            hwmode: "11a",
+            id: 0,
+            password: "TestPass"
+        }
+    ]
+};
+
+const threeDevices = {
+    devices: [
+        {
+            SSID: "Turris1",
+            channel: 60,
+            enabled: true,
+            guest_wifi: { enabled: false },
+            hidden: false,
+            htmode: "HT40",
+            hwmode: "11a",
+            id: 0,
+            password: "TestPass"
+        },
+        {
+            SSID: "Turris2",
+            channel: 60,
+            enabled: false,
+            guest_wifi: { enabled: false },
+            hidden: false,
+            htmode: "HT40",
+            hwmode: "11a",
+            id: 0,
+            password: "TestPass"
+        },
+        {
+            SSID: "Turris3",
+            channel: 60,
+            enabled: true,
+            guest_wifi: { enabled: false },
+            hidden: false,
+            htmode: "HT40",
+            hwmode: "11a",
+            id: 0,
+            password: ""
+        }
+    ]
+};
+
+export {oneDevice, twoDevices, threeDevices};
\ No newline at end of file