diff --git a/playwright.config.ts b/playwright.config.ts
index 0f825a3c5..8c54beabd 100644
--- a/playwright.config.ts
+++ b/playwright.config.ts
@@ -15,6 +15,12 @@ function getFreePort(): Promise<number> {
   });
 }
 
+const desktopSafari = devices["Desktop Safari"];
+const userAgent =
+  process.platform === "darwin"
+    ? desktopSafari.userAgent
+    : desktopSafari.userAgent.replace(/\([^)]*\)/, "(X11; Linux x86_64)");
+
 const testHttpApiPort = await getFreePort();
 process.env.VITE_TEST_HTTP_API_PORT = String(testHttpApiPort);
 
@@ -42,7 +48,8 @@ const config: PlaywrightTestConfig = {
     {
       name: "webkit",
       use: {
-        ...devices["Desktop Safari"],
+        ...desktopSafari,
+        userAgent,
       },
     },
   ],
diff --git a/tests/e2e/navigation.spec.ts b/tests/e2e/navigation.spec.ts
index c7c02f34a..51e9ca30d 100644
--- a/tests/e2e/navigation.spec.ts
+++ b/tests/e2e/navigation.spec.ts
@@ -99,11 +99,7 @@ test("history position survives a reload", async ({ page }) => {
 
 test("shortcuts stay within the app's history", async ({ page }) => {
   await launch(page);
-  const mac = await page.evaluate(
-    () =>
-      navigator.platform.includes("Mac") ||
-      navigator.userAgent.includes("OS X"),
-  );
+  const mac = process.platform === "darwin";
   const backShortcut = mac ? "Meta+BracketLeft" : "Alt+ArrowLeft";
   const forwardShortcut = mac ? "Meta+BracketRight" : "Alt+ArrowRight";
   await openRepo(page);