Fix flaky split route modules test (#13394)

Author: markdalgleish

integration/split-route-modules-test.ts

@@ -56,7 +56,7 @@ const files = {
         }
       })();
       const timeoutPromise = new Promise((_, reject) => {
-        setTimeout(() => reject(new Error("Client loader wasn't unblocked after 2s")), 2000);
+        setTimeout(() => reject(new Error("Client loader wasn't unblocked after 5s")), 5000);
       });
       await Promise.race([pollingPromise, timeoutPromise]);
       return {
@@ -131,7 +131,7 @@ const files = {
         }
       })();
       const timeoutPromise = new Promise((_, reject) => {
-        setTimeout(() => reject(new Error("Client loader wasn't unblocked after 2s")), 2000);
+        setTimeout(() => reject(new Error("Client loader wasn't unblocked after 5s")), 5000);
       });
       await Promise.race([pollingPromise, timeoutPromise]);
       return "clientLoader in main chunk: " + eval("typeof inUnsplittableMainChunk === 'function'");
@@ -419,8 +419,10 @@ test.describe("Split route modules", async () => {
 
       // Ensure splittable client loader works during SSR
       await page.goto(`http://localhost:${port}/splittable`);
-      expect(page.locator("[data-hydrate-fallback]")).toHaveText("Loading...");
-      expect(page.locator("[data-hydrate-fallback]")).toHaveCSS(
+      await expect(page.locator("[data-hydrate-fallback]")).toHaveText(
+        "Loading..."
+      );
+      await expect(page.locator("[data-hydrate-fallback]")).toHaveCSS(
         "padding",
         "20px"
       );
@@ -431,7 +433,9 @@ test.describe("Split route modules", async () => {
 
       // Ensure unsplittable client loader works during SSR
       await page.goto(`http://localhost:${port}/unsplittable`);
-      expect(page.locator("[data-hydrate-fallback]")).toHaveText("Loading...");
+      await expect(page.locator("[data-hydrate-fallback]")).toHaveText(
+        "Loading..."
+      );
       await unblockClientLoader(page);
       await expect(page.locator("[data-loader-data]")).toHaveText(
         `loaderData = "clientLoader in main chunk: true"`