diff --git a/listeners.js b/listeners.js
index ef4a6bd..9603106 100644
--- a/listeners.js
+++ b/listeners.js
@@ -86,6 +86,14 @@
 		// Send acknowledgement to the server.
 		send( "ack" );
 
+		QUnit.on( "error", function( error ) {
+			send( "error", {
+				message: error.message,
+				name: error.name,
+				stack: error.stack
+			} );
+		} );
+
 		QUnit.on( "testEnd", function( data ) {
 			send( "testEnd", data );
 		} );
diff --git a/reporter.js b/reporter.js
index ceef537..cb01799 100644
--- a/reporter.js
+++ b/reporter.js
@@ -113,6 +113,17 @@ export function reportTest( test, { fullBrowser, id } ) {
 	}
 }
 
+export function reportError( error ) {
+	const title = `${ error.name || "Error" }: ${ error.message }`;
+	let message = chalk.red( title );
+
+	// Chromium error stacks include the title in the first line,
+	// but Firefox error stacks do not.
+	message += `\n${ chalk.gray( error.stack.replace( `${ title }\n`, "" ) ) }`;
+	console.error( `\n\n${ message }` );
+	return message;
+}
+
 export function reportEnd( result, { descriptiveUrl, fullBrowser, id } ) {
 	console.log(
 		`\n\nTests finished in ${ prettyMs( result.runtime ) } ` +
diff --git a/run.js b/run.js
index e754fdf..0fc6f35 100644
--- a/run.js
+++ b/run.js
@@ -3,7 +3,7 @@ import { asyncExitHook, gracefulExit } from "exit-hook";
 import { getLatestBrowser } from "./browserstack/api.js";
 import { buildBrowserFromString } from "./browserstack/buildBrowserFromString.js";
 import { localTunnel } from "./browserstack/local.js";
-import { reportEnd, reportTest } from "./reporter.js";
+import { reportEnd, reportError, reportTest } from "./reporter.js";
 import { createTestServer } from "./createTestServer.js";
 import { buildTestUrl } from "./lib/buildTestUrl.js";
 import { generateHash, generateModuleId } from "./lib/generateHash.js";
@@ -85,10 +85,10 @@ export async function run( {
 					const reportId = message.id;
 					const report = reports[ reportId ];
 					touchBrowser( report.browser );
-					const errors = reportTest( message.data, report );
+					const errorMessage = reportTest( message.data, report );
 					pendingErrors[ reportId ] ??= Object.create( null );
-					if ( errors ) {
-						pendingErrors[ reportId ][ message.data.name ] = errors;
+					if ( errorMessage ) {
+						pendingErrors[ reportId ][ message.data.name ] = errorMessage;
 					} else {
 						const existing = pendingErrors[ reportId ][ message.data.name ];
 
@@ -106,6 +106,15 @@ export async function run( {
 					}
 					break;
 				}
+				case "error": {
+					const reportId = message.id;
+					const report = reports[ reportId ];
+					touchBrowser( report.browser );
+					const errorMessage = reportError( message.data );
+					pendingErrors[ reportId ] ??= Object.create( null );
+					pendingErrors[ reportId ][ message.data.message ] = errorMessage;
+					break;
+				}
 				case "runEnd": {
 					const reportId = message.id;
 					const report = reports[ reportId ];
@@ -127,6 +136,9 @@ export async function run( {
 							return;
 						}
 						errorMessages.push( ...Object.values( pendingErrors[ reportId ] ) );
+						if ( !errorMessages.length ) {
+							errorMessages.push( `Global failure in ${ report.url }` );
+						}
 					}
 
 					// Run the next test
@@ -335,9 +347,9 @@ export async function run( {
 					stop = true;
 					console.error(
 						chalk.red(
-							`No tests were run with URL "${ report.url }" in ${ getBrowserString(
-								report.browser
-							) } (${ report.id })`
+							`No tests were run with URL "${ report.url }" in ${
+								report.fullBrowser
+							} (${ report.id })`
 						)
 					);
 				}
@@ -351,7 +363,8 @@ export async function run( {
 				gracefulExit( 0 );
 			}
 		} else {
-			console.error( chalk.red( `${ errorMessages.length } tests failed.` ) );
+			const len = errorMessages.length;
+			console.error( chalk.red( `${ len } test${ len > 1 ? "s" : "" } failed.` ) );
 			console.log(
 				errorMessages.map( ( error, i ) => `\n${ i + 1 }. ${ error }` ).join( "\n" )
 			);