diff --git a/playwright/e2e/crypto/complete-security.spec.ts b/playwright/e2e/crypto/complete-security.spec.ts
index 9d85f85356..da6974459c 100644
--- a/playwright/e2e/crypto/complete-security.spec.ts
+++ b/playwright/e2e/crypto/complete-security.spec.ts
@@ -12,15 +12,6 @@ import { logIntoElement } from "./utils";
 test.describe("Complete security", () => {
     test.use({
         displayName: "Jeff",
-        config: {
-            // The only thing that we really *need* (otherwise Element refuses to load) is a default homeserver.
-            // We point that to a guaranteed-invalid domain.
-            default_server_config: {
-                "m.homeserver": {
-                    base_url: "https://server.invalid",
-                },
-            },
-        },
     });
 
     test("should go straight to the welcome screen if we have no signed device", async ({
@@ -32,5 +23,5 @@ test.describe("Complete security", () => {
         await expect(page.getByText("Welcome Jeff", { exact: true })).toBeVisible();
     });
 
-    // see also "Verify device during login with SAS" in `verifiction.spec.ts`.
+    // see also "Verify device during login with SAS" in `verification.spec.ts`.
 });
diff --git a/playwright/e2e/register/email.spec.ts b/playwright/e2e/register/email.spec.ts
index 01c8f03487..3ed17b69d0 100644
--- a/playwright/e2e/register/email.spec.ts
+++ b/playwright/e2e/register/email.spec.ts
@@ -26,7 +26,7 @@ test.describe("Email Registration", async () => {
             }),
     });
 
-    test.beforeEach(async ({ page }) => {
+    test.beforeEach(async ({ homeserver, page }) => {
         await page.goto("/#/register");
     });
 
diff --git a/playwright/e2e/register/register.spec.ts b/playwright/e2e/register/register.spec.ts
index 58c6c27dd9..7756fe53c5 100644
--- a/playwright/e2e/register/register.spec.ts
+++ b/playwright/e2e/register/register.spec.ts
@@ -11,6 +11,17 @@ import { consentHomeserver } from "../../plugins/homeserver/synapse/consentHomes
 
 test.describe("Registration", () => {
     test.use(consentHomeserver);
+    test.use({
+        config: {
+            // The only thing that we really *need* (otherwise Element refuses to load) is a default homeserver.
+            // We point that to a guaranteed-invalid domain.
+            default_server_config: {
+                "m.homeserver": {
+                    base_url: "https://server.invalid",
+                },
+            },
+        },
+    });
 
     test.beforeEach(async ({ page }) => {
         await page.goto("/#/register");
diff --git a/playwright/element-web-test.ts b/playwright/element-web-test.ts
index a56114b96e..f2f2afd3b9 100644
--- a/playwright/element-web-test.ts
+++ b/playwright/element-web-test.ts
@@ -115,12 +115,13 @@ export const test = base.extend<Fixtures>({
         await context.route(`http://localhost:8080/config.json*`, async (route) => {
             const json = {
                 ...CONFIG_JSON,
+                ...config,
                 default_server_config: {
                     "m.homeserver": {
                         base_url: homeserver.baseUrl,
                     },
+                    ...config.default_server_config,
                 },
-                ...config,
             };
             json["features"] = {
                 ...json["features"],