diff --git a/e2e/bookmarks.spec.ts b/e2e/bookmarks.spec.ts
index ad5d801..209eba8 100644
--- a/e2e/bookmarks.spec.ts
+++ b/e2e/bookmarks.spec.ts
@@ -14,7 +14,10 @@ test.describe('Bookmarks', () => {
 
     // A later visit, on a different page: kept places outlive the one they were kept from.
     await page.goto('/');
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    // Generously timed on purpose: this suite shares one software rasterizer, and the boot
+    // it waits on is the slowest thing in it. The default five seconds is a coin toss
+    // under a full parallel run.
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
     await page.getByRole('tab', { name: 'Bookmarks' }).click();
 
     const kept = page.locator('#dock-panel-bookmarks li').filter({ hasText: 'Earth' });
diff --git a/e2e/galaxy-view.spec.ts b/e2e/galaxy-view.spec.ts
index b9e31c9..7ef7238 100644
--- a/e2e/galaxy-view.spec.ts
+++ b/e2e/galaxy-view.spec.ts
@@ -9,7 +9,10 @@ test.describe('Galaxy view', () => {
   test('boots the app, initializes the 3D scene, and starts in the galaxy overview (no system controls shown)', async ({ page }) => {
     await page.goto('/?stars=4000');
 
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    // Generously timed on purpose: this suite shares one software rasterizer, and the boot
+    // it waits on is the slowest thing in it. The default five seconds is a coin toss
+    // under a full parallel run.
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
     // The dock's tab strip is up before the scene finishes booting; the search is one tab in it.
     await expect(page.getByRole('tab', { name: 'Search' })).toBeVisible();
     await expect(backButtonLocator(page)).toHaveCount(0);
@@ -23,7 +26,7 @@ test.describe('Galaxy view', () => {
     // up to more than the default per-test budget.
     test.setTimeout(90_000);
     await page.goto('/?stars=4000');
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
 
     await page.getByRole('button', { name: 'Milky Way' }).click();
 
diff --git a/e2e/plan-view.spec.ts b/e2e/plan-view.spec.ts
index 79626c1..42a26e4 100644
--- a/e2e/plan-view.spec.ts
+++ b/e2e/plan-view.spec.ts
@@ -34,7 +34,10 @@ test.describe('Plan view', () => {
     await expect(plan).toHaveAttribute('aria-pressed', 'true');
 
     // The scene survives the swap: it is still this system, still labelled, still readable.
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    // Generously timed on purpose: this suite shares one software rasterizer, and the boot
+    // it waits on is the slowest thing in it. The default five seconds is a coin toss
+    // under a full parallel run.
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
     await expect.poll(spread, { timeout: 30_000 }).toBeGreaterThan(2);
     await page.getByRole('tab', { name: 'Readout' }).click();
     await expect(page.getByTestId('hud-title')).toHaveText('Sol');
@@ -48,7 +51,7 @@ test.describe('Plan view', () => {
   test('keeps the scale ladder honest about how far out the view is', async ({ page }) => {
     test.setTimeout(90_000);
     await page.goto('/?stars=4000');
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
     await expect(page.getByTestId('hud-current-level')).toHaveText('Solar Neighbourhood', { timeout: 30_000 });
 
     await page.getByRole('tab', { name: 'Display' }).click();
diff --git a/e2e/route-plotting.spec.ts b/e2e/route-plotting.spec.ts
index d308d06..ab0737a 100644
--- a/e2e/route-plotting.spec.ts
+++ b/e2e/route-plotting.spec.ts
@@ -4,7 +4,10 @@ test.describe('Route plotting', () => {
   test('chains one star to another through the crossings a chosen range allows', async ({ page }) => {
     test.setTimeout(90_000);
     await page.goto('/?stars=4000');
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    // Generously timed on purpose: this suite shares one software rasterizer, and the boot
+    // it waits on is the slowest thing in it. The default five seconds is a coin toss
+    // under a full parallel run.
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
 
     await page.getByRole('tab', { name: 'Routes' }).click();
 
@@ -32,7 +35,7 @@ test.describe('Route plotting', () => {
   test('says what range a crossing would need, rather than only that there is none', async ({ page }) => {
     test.setTimeout(90_000);
     await page.goto('/?stars=4000');
-    await expect(page.getByTestId('scene-canvas')).toBeVisible();
+    await expect(page.getByTestId('scene-canvas')).toBeVisible({ timeout: 30_000 });
 
     await page.getByRole('tab', { name: 'Routes' }).click();
     await page.locator('#route-from').fill('Sol');