diff --git a/core/gather/navigation-runner.js b/core/gather/navigation-runner.js
index 33fef1f139c8..dcd79e97b208 100644
--- a/core/gather/navigation-runner.js
+++ b/core/gather/navigation-runner.js
@@ -92,7 +92,9 @@ async function _navigate(navigationContext) {
     return {requestedUrl, mainDocumentUrl, navigationError: undefined};
   } catch (err) {
     if (!(err instanceof LighthouseError)) throw err;
-    if (err.code !== 'NO_FCP' && err.code !== 'PAGE_HUNG' && err.code !== 'TARGET_CRASHED') throw err;
+    if (err.code !== 'NO_FCP' && err.code !== 'PAGE_HUNG' && err.code !== 'TARGET_CRASHED') {
+      throw err;
+    }
     if (typeof requestor !== 'string') throw err;
 
     // TODO: Make the urls optional here so we don't need to throw an error with a callback requestor.
diff --git a/core/test/gather/mock-driver.js b/core/test/gather/mock-driver.js
index d3f88dbfaf8a..840461bcd232 100644
--- a/core/test/gather/mock-driver.js
+++ b/core/test/gather/mock-driver.js
@@ -157,8 +157,9 @@ function createMockDriver() {
   const context = createMockExecutionContext();
   const targetManager = createMockTargetManager(session);
 
-  // our `fatalRejection`
-  let rej;
+  // The `fatalRejection`
+  /** @param {any} _ */
+  let rej = _ => {};
   const promise = new Promise((_, theRej) => {
     rej = theRej;
   });
@@ -177,8 +178,8 @@ function createMockDriver() {
       fetchResource: fnAny(),
     },
     networkMonitor: new NetworkMonitor(targetManager.asTargetManager()),
-    listenForCrashes: session.on('Inspector.targetCrashed', _ => {
-      rej(new Error('TARGETCRAHSZHZD'));
+    listenForCrashes: session.on('Inspector.targetCrashed', () => {
+      rej(new Error('TARGET_CRASHED'));
     }),
     fatalRejection: {promise, rej},
 
diff --git a/core/test/gather/session-test.js b/core/test/gather/session-test.js
index a0c63c68686b..b69818917ce8 100644
--- a/core/test/gather/session-test.js
+++ b/core/test/gather/session-test.js
@@ -104,6 +104,7 @@ describe('ProtocolSession', () => {
   describe('.dispose', () => {
     it('should detach from the session', async () => {
       const detach = fnAny();
+      detach.mockResolvedValue(undefined);
       class MockCdpSession extends EventEmitter {
         constructor() {
           super();