diff --git a/tests/meson.build b/tests/meson.build
index a22a0d949..821c83cd9 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -48,6 +48,9 @@ shell_tests = [
     'name': 'headlessStart',
     'options': ['--hotplug'],
   },
+  {
+    'name': 'fittsy',
+  },
 ]
 
 gvc_typelib_path = fs.parent(libgvc.get_variable('libgvc_gir')[1].full_path())
diff --git a/tests/shell/fittsy.js b/tests/shell/fittsy.js
new file mode 100644
index 000000000..53f58e0e4
--- /dev/null
+++ b/tests/shell/fittsy.js
@@ -0,0 +1,122 @@
+/* eslint camelcase: ["error", { properties: "never", allow: ["^script_"] }] */
+
+import Clutter from 'gi://Clutter';
+import Shell from 'gi://Shell';
+
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+import {sleep} from 'resource:///org/gnome/shell/ui/scripting.js';
+
+const {Orientation, PickMode, TextDirection} = Clutter;
+const EPSILON = 0.1;
+
+function defineScriptEvent(eventName, description) {
+    Shell.PerfLog.get_default().define_event(
+        `script.${eventName}`, description, 'i');
+}
+
+function scriptEvent(eventName, bool) {
+    Shell.PerfLog.get_default().event_i(`script.${eventName}`,
+        Number(bool));
+}
+
+function checkFittsiness(eventName, actor, orientation, edge) {
+    const [x, y] = actor.get_transformed_position();
+    const pickCoords = orientation === Orientation.HORIZONTAL
+        ? [edge, y + Math.floor(actor.height / 2)]
+        : [x + Math.floor(actor.width / 2), edge];
+    const pickedActor = global.stage.get_actor_at_pos(
+        PickMode.REACTIVE, ...pickCoords);
+
+    scriptEvent(eventName, pickedActor === actor);
+}
+
+/**
+ * run:
+ */
+export async function run() {
+    defineScriptEvent('fittsyDash', 'Dash extends to screen edge');
+    defineScriptEvent('fittsyTopBarVert', 'Top bar extends to top screen edge');
+    defineScriptEvent('fittsyTopBarHorzLTR', 'Top bar extends to left screen edge');
+    defineScriptEvent('fittsyTopBarHorzRTL', 'Top bar extends to right screen edge');
+
+    const {primaryMonitor} = Main.layoutManager;
+    const topEdge = primaryMonitor.y + EPSILON;
+    const bottomEdge = primaryMonitor.y + primaryMonitor.height - EPSILON;
+    const leftEdge = primaryMonitor.x + EPSILON;
+    const rightEdge = primaryMonitor.x + primaryMonitor.width - EPSILON;
+
+    const showApps = Main.overview.dash.showAppsButton;
+    console.debug('Checking that dash extends to bottom screen edge');
+    checkFittsiness('fittsyDash',
+        showApps, Orientation.VERTICAL, bottomEdge);
+
+    const activitiesButton = Main.panel.statusArea.activities;
+    console.debug('Checking that top bar extends to top screen edge');
+    checkFittsiness('fittsyTopBarVert',
+        activitiesButton, Orientation.VERTICAL, topEdge);
+
+    Main.panel.text_direction = TextDirection.LTR;
+    await sleep(50);
+
+    console.debug('Checking that top bar extends to left screen edge for LTR');
+    checkFittsiness('fittsyTopBarHorzLTR',
+        activitiesButton, Orientation.HORIZONTAL, leftEdge);
+
+    Main.panel.text_direction = TextDirection.RTL;
+    await sleep(50);
+
+    console.debug('Checking that top bar extends to right screen edge for RTL');
+    checkFittsiness('fittsyTopBarHorzRTL',
+        activitiesButton, Orientation.HORIZONTAL, rightEdge);
+}
+
+let fittsyDash = false;
+let fittsyTopBarVert = false;
+let fittsyTopBarHorzLTR = false;
+let fittsyTopBarHorzRTL = false;
+
+/**
+ * @param {number} time
+ * @param {number} num
+ */
+export function script_fittsyDash(time, num) {
+    fittsyDash = num !== 0;
+}
+
+/**
+ * @param {number} time
+ * @param {number} num
+ */
+export function script_fittsyTopBarVert(time, num) {
+    fittsyTopBarVert = num !== 0;
+}
+
+/**
+ * @param {number} time
+ * @param {number} num
+ */
+export function script_fittsyTopBarHorzLTR(time, num) {
+    fittsyTopBarHorzLTR = num !== 0;
+}
+
+/**
+ * @param {number} time
+ * @param {number} num
+ */
+export function script_fittsyTopBarHorzRTL(time, num) {
+    fittsyTopBarHorzRTL = num !== 0;
+}
+
+export function finish() {
+    if (!fittsyDash)
+        throw new Error('Dash does not extend to screen edge');
+
+    if (!fittsyTopBarVert)
+        throw new Error('Top bar does not extend to top screen edge');
+
+    if (!fittsyTopBarHorzLTR)
+        throw new Error('Top bar does not extend to left screen edge');
+
+    if (!fittsyTopBarHorzRTL)
+        throw new Error('Top bar does not extend to right screen edge');
+}