diff --git a/tests/js/tests.js b/tests/js/tests.js
index 1728a4ed..20127728 100644
--- a/tests/js/tests.js
+++ b/tests/js/tests.js
@@ -46,6 +46,19 @@ test.describe("top nav bar", () => {
     const header = page.locator("header.mobile-header");
     await expect(header).toHaveScreenshot();
   });
+
+  test("uses custom icons on mobile dark mode cycle", async ({ page }) => {
+    await setMobile(page);
+    await page.goto("sphinx_guide/lists.html");
+    const header = page.locator("header.mobile-header");
+    await expect(header).toHaveScreenshot();
+    await click(page, "div.theme-toggle-header button");
+    await expect(header).toHaveScreenshot();
+    await click(page, "div.theme-toggle-header button");
+    await expect(header).toHaveScreenshot();
+    await click(page, "div.theme-toggle-header button");
+    await expect(header).toHaveScreenshot();
+  });
 });
 
 test("right side bar is not broken by our page layout", async ({ page }) => {
diff --git a/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-1-linux.png b/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-1-linux.png
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diff --git a/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-2-linux.png b/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-2-linux.png
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diff --git a/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-3-linux.png b/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-3-linux.png
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diff --git a/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-4-linux.png b/tests/js/tests.js-snapshots/top-nav-bar-uses-custom-icons-on-mobile-dark-mode-cycle-4-linux.png
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