diff --git a/.github/workflows/insomnia-test.yml b/.github/workflows/insomnia-test.yml
index c0347dec06..cebd0bbae1 100644
--- a/.github/workflows/insomnia-test.yml
+++ b/.github/workflows/insomnia-test.yml
@@ -20,14 +20,10 @@ jobs:
   # ---------------------------------------------------------------------------
   # Build the Insomnia binary once and cache it by commit SHA. All shards
   # restore the same cached binary instead of each building it.
-  #
-  # continue-on-error: true so a failure here never blocks the PR merge check
-  # and downstream jobs still run instead of being skipped.
   # ---------------------------------------------------------------------------
   build:
     timeout-minutes: 30
     runs-on: ubuntu-latest
-    continue-on-error: true
     permissions:
       contents: read
       packages: read
diff --git a/packages/insomnia-test/flows/cookie.flow.ts b/packages/insomnia-test/flows/cookie.flow.ts
index db1a928e2e..5780605f5e 100644
--- a/packages/insomnia-test/flows/cookie.flow.ts
+++ b/packages/insomnia-test/flows/cookie.flow.ts
@@ -75,19 +75,9 @@ export class CookieFlow extends BaseFlow {
   /**
    * Polls the on-disk `CookieJar` NeDB file directly until it contains
    * every one of `cookies` by key/value, re-running the whole
-   * open→setCookies→close write once per mismatch. Confirmed live via a
-   * diagnostic probe: a cookie missing right after `setCookies()` doesn't
-   * arrive later no matter how long this waits — the file's mtime never
-   * moves again, across 50+ polls spanning almost a minute. So this isn't
-   * an in-memory-state-outrunning-disk timing gap; it's a genuinely lost
-   * write, the same species of bug `HttpRequestFlow.waitForUrlPersisted()`
-   * works around for URLs. The likely cause here: clicking "Done" unmounts
-   * the edit dialog, and under CPU-contended parallel runs the app's own
-   * debounced save can still be pending at that point, so the unmount
-   * cancels it before it ever fires — so the cookie never lands on its own
-   * and the same write has to be repeated. `CookiePage` now polls the
-   * on-disk jar after each field edit to narrow that window, but this
-   * stays as the backstop.
+   * open→setCookies→close write once per mismatch. The dialog's unmount
+   * can cancel the app's debounced save, so a lost cookie write has to be
+   * repeated, not only waited for.
    * @param item - The Collection/request whose location the Cookie Jar dialog is opened from, for a retry
    * @param cookies - The cookies that must all be present in the persisted jar
    */
diff --git a/packages/insomnia-test/misc/echo-server.js b/packages/insomnia-test/misc/echo-server.js
index 3cf093ea0b..9ff4a9d48b 100644
--- a/packages/insomnia-test/misc/echo-server.js
+++ b/packages/insomnia-test/misc/echo-server.js
@@ -277,15 +277,15 @@ const httpsServer = https.createServer(HTTPS_OPTIONS, handleRequest);
 const customCaHttpsServer = https.createServer(CUSTOM_CA_HTTPS_OPTIONS, handleRequest);
 const mtlsHttpsServer = https.createServer(MTLS_HTTPS_OPTIONS, handleRequest);
 
-server.listen(4060, () => {
+server.listen(4060, '127.0.0.1', () => {
   process.stdout.write('Listening at http://localhost:4060\n');
 });
-httpsServer.listen(4061, () => {
+httpsServer.listen(4061, '127.0.0.1', () => {
   process.stdout.write('Listening at https://localhost:4061\n');
 });
-customCaHttpsServer.listen(4062, () => {
+customCaHttpsServer.listen(4062, '127.0.0.1', () => {
   process.stdout.write('Listening at https://localhost:4062 (custom CA)\n');
 });
-mtlsHttpsServer.listen(4063, () => {
+mtlsHttpsServer.listen(4063, '127.0.0.1', () => {
   process.stdout.write('Listening at https://localhost:4063 (mTLS)\n');
 });
diff --git a/packages/insomnia-test/misc/fixtures.ts b/packages/insomnia-test/misc/fixtures.ts
index e378c754a6..878e3bebf3 100644
--- a/packages/insomnia-test/misc/fixtures.ts
+++ b/packages/insomnia-test/misc/fixtures.ts
@@ -252,6 +252,7 @@ export const test = base.extend<Fixtures>({
       crypto.randomUUID(),
     );
     await use(dataPath);
+    fs.rmSync(dataPath, { recursive: true, force: true });
   },
 
   // Its own fixture so a spec that needs the real v13 onboarding/login
diff --git a/packages/insomnia-test/misc/mock-api.js b/packages/insomnia-test/misc/mock-api.js
index b5fc805712..5c37ae7105 100644
--- a/packages/insomnia-test/misc/mock-api.js
+++ b/packages/insomnia-test/misc/mock-api.js
@@ -1611,6 +1611,6 @@ const server = http.createServer((req, res) => {
   }
 });
 
-server.listen(4010, () => {
+server.listen(4010, "127.0.0.1", () => {
   process.stdout.write("Listening at http://localhost:4010\n");
 });
diff --git a/packages/insomnia-test/pages/base.page.ts b/packages/insomnia-test/pages/base.page.ts
index c5b1f345e5..ff9fbf2192 100644
--- a/packages/insomnia-test/pages/base.page.ts
+++ b/packages/insomnia-test/pages/base.page.ts
@@ -101,6 +101,7 @@ export abstract class BasePage {
       }).toPass({ timeout: DEFAULT_TIMEOUT });
       if (await this.valueHolds(cmLocator, text, 200)) return;
     }
+    throw new Error(`CodeMirror value "${text}" did not hold after 3 attempts`);
   }
 
   /**