diff --git a/src/components/dashboards/scania/display/ScaniaDisplay.vue b/src/components/dashboards/scania/display/ScaniaDisplay.vue
index c3efae90..ea63642a 100644
--- a/src/components/dashboards/scania/display/ScaniaDisplay.vue
+++ b/src/components/dashboards/scania/display/ScaniaDisplay.vue
@@ -5,7 +5,7 @@
       <div class="flex-area justify-content-start w-100 gearbox-wrapper">
         <div class="truck-shifterType flex-area">
           <span>{{
-            $trukShifterTypeLetter(
+            $truckShifterTypeLetter(
               telemetry.truck.transmission,
               telemetry.truck.brand
             )
diff --git a/src/utils/telemetry/_grear.utils.js b/src/utils/telemetry/_grear.utils.js
index fbcbe0d5..05fc33b7 100644
--- a/src/utils/telemetry/_grear.utils.js
+++ b/src/utils/telemetry/_grear.utils.js
@@ -48,7 +48,7 @@ export const $trukGear = (transmission, brand, withShifterType = true) => {
   return strGear;
 };
 
-export const $trukShifterTypeLetter = (transmission, brand) => {
+export const $truckShifterTypeLetter = (transmission, brand) => {
   const gear = $gearInfo(transmission, brand).gear;
   const crawlingGear = $gearInfo(transmission, brand).crawlingGear;
   let shifterType = 'D';
diff --git a/test/unit/src/utils/telemetry/gear.spec.js b/test/unit/src/utils/telemetry/gear.spec.js
new file mode 100644
index 00000000..a0d86cb2
--- /dev/null
+++ b/test/unit/src/utils/telemetry/gear.spec.js
@@ -0,0 +1,34 @@
+import { $gearInfo } from '@/utils/telemetry/_grear.utils';
+
+describe('Telemetry gear utils', () => {
+  const generateTransmissionData = (gear) => {
+    return { gear: { displayed: gear } };
+  };
+
+  describe('$gearInfo', () => {
+    test.each(['Toto', 'Mercedes'])(
+      'The crawling gear should not exist for unsupported brand truck',
+      (brandName) => {
+        const gearDisplayed = 5;
+        const transmission = generateTransmissionData(gearDisplayed);
+        const result = $gearInfo(transmission, { name: brandName });
+
+        expect(result).toEqual({
+          gear: gearDisplayed,
+          crawlingGear: 0
+        });
+      }
+    );
+
+    test.each(['Volvo', 'Scania', 'Kenworth'])('tes', (brandName) => {
+      const gearDisplayed = 5;
+      const transmission = generateTransmissionData(gearDisplayed);
+      const result = $gearInfo(transmission, { name: brandName });
+
+      expect(result).toEqual({
+        gear: gearDisplayed,
+        crawlingGear: 2
+      });
+    });
+  });
+});
diff --git a/test/unit/test.helper.js b/test/unit/test.helper.js
index 777fe0d7..564bae23 100644
--- a/test/unit/test.helper.js
+++ b/test/unit/test.helper.js
@@ -3,11 +3,17 @@ export const changeTelemetryData = (obj, path, value) =>
 
 export const deepChangeObjectValue = (obj, path, value) => {
   let i;
+  const splitPath = path.split('.');
 
-  path = path.split('.');
-  for (i = 0; i < path.length - 1; i++) obj = obj[path[i]];
+  for (i = 0; i < splitPath.length - 1; i++) {
+    if (!Object.hasOwnProperty.call(obj, splitPath[i]))
+      throw new Error(
+        `The path "${path}" was not found on the original object`
+      );
+    obj = obj[splitPath[i]];
+  }
 
-  obj[path[i]] = value;
+  obj[splitPath[i]] = value;
 
   return obj;
 };