diff --git a/src/hooks/fetchWeather/useGetWeather.ts b/src/hooks/fetchWeather/useGetWeather.ts
index e6cc108..7803d49 100644
--- a/src/hooks/fetchWeather/useGetWeather.ts
+++ b/src/hooks/fetchWeather/useGetWeather.ts
@@ -1,7 +1,7 @@
 import { useQuery, useQueries } from "@tanstack/react-query"
 import { type City, type WeatherApiResponse } from "./types"
 
-const sanitizeAltitude = (alt?: number) => {
+export const sanitizeAltitude = (alt?: number) => {
   if (alt === undefined) return undefined
   return Math.min(9000, Math.max(-500, alt))
 }
diff --git a/tests/components/ViewCity.test.tsx b/tests/components/ViewCity.test.tsx
index 8c7e45a..309134d 100644
--- a/tests/components/ViewCity.test.tsx
+++ b/tests/components/ViewCity.test.tsx
@@ -24,7 +24,7 @@ describe("ViewCity", () => {
     })
   })
 
-  it("renders the current temperature and wind speed", () => {
+  it("should render the current temperature and wind speed", () => {
     mockUseGetWeather.mockReturnValue({
       isLoading: false,
       error: null,
@@ -52,7 +52,7 @@ describe("ViewCity", () => {
     expect(mockUseGetWeather).toHaveBeenCalledWith(59.9, 10.7)
   })
 
-  it("renders a loading message while weather data is loading", () => {
+  it("should render a loading message while weather data is loading", () => {
     mockUseGetWeather.mockReturnValue({ isLoading: true, error: null })
 
     render(<ViewCity city="Oslo" />)
@@ -60,7 +60,7 @@ describe("ViewCity", () => {
     expect(screen.getByText("Laster")).toBeTruthy()
   })
 
-  it("renders an error message when the weather request fails", () => {
+  it("should render an error message when the weather request fails", () => {
     mockUseGetWeather.mockReturnValue({
       isLoading: false,
       error: new Error("Request failed"),
diff --git a/tests/components/listItem.test.tsx b/tests/components/listItem.test.tsx
index c3d6192..0fe4d7f 100644
--- a/tests/components/listItem.test.tsx
+++ b/tests/components/listItem.test.tsx
@@ -5,7 +5,7 @@ import { describe, expect, it } from "vitest"
 import ListItem from "../../src/components/listItem"
 
 describe("ListItem", () => {
-  it("renders city weather, forecast temperatures, and a rain icon", () => {
+  it("should render city weather, forecast temperatures, and a rain icon", () => {
     render(
       <ListItem
         city={{
@@ -27,7 +27,7 @@ describe("ListItem", () => {
     expect(screen.getByText("⛅7°")).toBeTruthy()
   })
 
-  it("shows fallback values when weather data is unavailable", () => {
+  it("should show fallback values when weather data is unavailable", () => {
     render(<ListItem city={{ name: "Trondheim" }} />)
 
     expect(screen.getByText("⛅")).toBeTruthy()
diff --git a/tests/components/location-list.test.tsx b/tests/components/location-list.test.tsx
index 354f015..74d9a5b 100644
--- a/tests/components/location-list.test.tsx
+++ b/tests/components/location-list.test.tsx
@@ -31,7 +31,7 @@ describe("LocationList", () => {
     mockUseGetWeatherForCities.mockReset()
   })
 
-  it("renders a loading message while city forecasts are loading", () => {
+  it("should render a loading message while city forecasts are loading", () => {
     mockUseGetWeatherForCities.mockReturnValue({ isLoading: true, results: [] })
 
     render(<LocationList onCitySelect={() => undefined} />)
@@ -39,7 +39,7 @@ describe("LocationList", () => {
     expect(screen.getByText("Loading...")).toBeTruthy()
   })
 
-  it("renders a weather row for every configured city", () => {
+  it("should render a weather row for every configured city", () => {
     mockUseGetWeatherForCities.mockReturnValue({
       isLoading: false,
       results: [
diff --git a/tests/hooks/fetchWeather/__snapshots__/useGetWeather.test.ts.snap b/tests/hooks/fetchWeather/__snapshots__/useGetWeather.test.ts.snap
new file mode 100644
index 0000000..dc204fb
--- /dev/null
+++ b/tests/hooks/fetchWeather/__snapshots__/useGetWeather.test.ts.snap
@@ -0,0 +1,11 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`should sanitize altitude -500 to -500 1`] = `-500`;
+
+exports[`should sanitize altitude -1000 to -500 1`] = `-500`;
+
+exports[`should sanitize altitude 100 to 100 1`] = `100`;
+
+exports[`should sanitize altitude 9000 to 9000 1`] = `9000`;
+
+exports[`should sanitize altitude 10000 to 9000 1`] = `9000`;
diff --git a/tests/hooks/fetchWeather/useGetWeather.test.ts b/tests/hooks/fetchWeather/useGetWeather.test.ts
new file mode 100644
index 0000000..4162919
--- /dev/null
+++ b/tests/hooks/fetchWeather/useGetWeather.test.ts
@@ -0,0 +1,17 @@
+// @vitest-environment jsdom
+
+import { expect, it } from "vitest"
+import { sanitizeAltitude } from "../../../src/hooks/fetchWeather/useGetWeather"
+
+it.each([
+  { input: 100, expected: 100 },
+  { input: -500, expected: -500 },
+  { input: 9000, expected: 9000 },
+  { input: -1000, expected: -500 },
+  { input: 10000, expected: 9000 },
+])("should sanitize altitude $input to $expected", ({ input, expected }) => {
+  const result = sanitizeAltitude(input)
+
+  expect(result).toEqual(expected)
+  expect(result).toMatchSnapshot()
+})