diff --git a/packages/html-reporter/src/testResultView.tsx b/packages/html-reporter/src/testResultView.tsx
index 525e1a484f..48a24a2391 100644
--- a/packages/html-reporter/src/testResultView.tsx
+++ b/packages/html-reporter/src/testResultView.tsx
@@ -14,7 +14,7 @@
   limitations under the License.
 */
 
-import type { ErrorDetails, TestAttachment, TestCase, TestResult, TestStep } from './types';
+import type { TestAttachment, TestCase, TestResult, TestStep } from './types';
 import * as React from 'react';
 import { TreeItem } from './treeItem';
 import { msToString } from './utils';
@@ -150,30 +150,26 @@ export const TestResultView: React.FC<{
   </div>;
 };
 
-function classifyErrors(testErrors: ErrorDetails[], diffs: ImageDiff[]) {
+function classifyErrors(testErrors: string[], diffs: ImageDiff[]) {
   return testErrors.map(error => {
-    if (error.shortMessage?.includes('Screenshot comparison failed:') && error.actual && error.expected) {
+    if (error.includes('Screenshot comparison failed:')) {
       const matchingDiff = diffs.find(diff => {
         const attachmentName = diff.actual?.attachment.name;
-        return attachmentName && error.actual.endsWith(attachmentName);
+        return attachmentName && error.includes(attachmentName);
       });
-      const errorSuffix = ['Call log:',
-        ...(error.log?.map(line => '  - ' + line) || []),
-        '',
-        error.snippet,
-        '',
-        error.callStack,
-      ].join('\n');
+
       if (matchingDiff) {
-        return {
-          type: 'screenshot',
-          diff: matchingDiff,
-          errorPrefix: error.shortMessage,
-          errorSuffix
-        };
+        const lines = error.split('\n');
+        const index = lines.findIndex(line => /Expected:|Previous:|Received:/.test(line));
+        const errorPrefix = index !== -1 ? lines.slice(0, index).join('\n') : lines[0];
+
+        const diffIndex = lines.findIndex(line => / +Diff:/.test(line));
+        const errorSuffix = diffIndex !== -1 ? lines.slice(diffIndex + 2).join('\n') : lines.slice(1).join('\n');
+
+        return { type: 'screenshot', diff: matchingDiff, errorPrefix, errorSuffix };
       }
     }
-    return { type: 'regular', error: error.message };
+    return { type: 'regular', error };
   });
 }
 
diff --git a/packages/html-reporter/src/types.ts b/packages/html-reporter/src/types.ts
index ad06ba1b6e..733e88e8b9 100644
--- a/packages/html-reporter/src/types.ts
+++ b/packages/html-reporter/src/types.ts
@@ -83,17 +83,6 @@ export type TestCase = Omit<TestCaseSummary, 'results'> & {
   results: TestResult[];
 };
 
-export type ErrorDetails = {
-  message: string;
-  location?: Location;
-  shortMessage?: string;
-  log?: string[];
-  expected?: any;
-  actual?: any;
-  snippet?: string;
-  callStack?: string;
-};
-
 export type TestAttachment = {
   name: string;
   body?: string;
@@ -106,7 +95,7 @@ export type TestResult = {
   startTime: string;
   duration: number;
   steps: TestStep[];
-  errors: ErrorDetails[];
+  errors: string[];
   attachments: TestAttachment[];
   status: 'passed' | 'failed' | 'timedOut' | 'skipped' | 'interrupted';
 };
diff --git a/packages/playwright/src/reporters/base.ts b/packages/playwright/src/reporters/base.ts
index f27b803389..4249429a36 100644
--- a/packages/playwright/src/reporters/base.ts
+++ b/packages/playwright/src/reporters/base.ts
@@ -32,17 +32,6 @@ type Annotation = {
 type ErrorDetails = {
   message: string;
   location?: Location;
-  callStack?: string;
-};
-
-type TestResultErrorDetails = ErrorDetails & {
-  shortMessage?: string;
-  log?: string[];
-  expected?: any;
-  actual?: any;
-
-  snippet?: string;
-  stack?: string;
 };
 
 type TestSummary = {
@@ -375,8 +364,8 @@ function quotePathIfNeeded(path: string): string {
   return path;
 }
 
-export function formatResultFailure(test: TestCase, result: TestResult, initialIndent: string, highlightCode: boolean): TestResultErrorDetails[] {
-  const errorDetails: TestResultErrorDetails[] = [];
+export function formatResultFailure(test: TestCase, result: TestResult, initialIndent: string, highlightCode: boolean): ErrorDetails[] {
+  const errorDetails: ErrorDetails[] = [];
 
   if (result.status === 'passed' && test.expectedStatus === 'failed') {
     errorDetails.push({
@@ -394,12 +383,6 @@ export function formatResultFailure(test: TestCase, result: TestResult, initialI
     errorDetails.push({
       message: indent(formattedError.message, initialIndent),
       location: formattedError.location,
-      shortMessage: error.shortMessage,
-      log: error.log,
-      expected: error.expected,
-      actual: error.actual,
-      snippet: error.snippet,
-      callStack: formattedError.callStack,
     });
   }
   return errorDetails;
@@ -479,12 +462,9 @@ export function formatError(error: TestError, highlightCode: boolean): ErrorDeta
     tokens.push(snippet);
   }
 
-  let callStack;
   if (parsedStack && parsedStack.stackLines.length) {
     tokens.push('');
     tokens.push(colors.dim(parsedStack.stackLines.join('\n')));
-    // TODO: pass raw lines.
-    callStack = colors.dim(parsedStack.stackLines.join('\n'));
   }
 
   let location = error.location;
@@ -494,7 +474,6 @@ export function formatError(error: TestError, highlightCode: boolean): ErrorDeta
   return {
     location,
     message: tokens.join('\n'),
-    callStack,
   };
 }
 
diff --git a/packages/playwright/src/reporters/html.ts b/packages/playwright/src/reporters/html.ts
index 9c6a92be20..5aada7e495 100644
--- a/packages/playwright/src/reporters/html.ts
+++ b/packages/playwright/src/reporters/html.ts
@@ -485,7 +485,7 @@ class HtmlBuilder {
       startTime: result.startTime.toISOString(),
       retry: result.retry,
       steps: dedupeSteps(result.steps).map(s => this._createTestStep(s)),
-      errors: formatResultFailure(test, result, '', true),
+      errors: formatResultFailure(test, result, '', true).map(error => error.message),
       status: result.status,
       attachments: this._serializeAttachments([
         ...result.attachments,
diff --git a/packages/playwright/src/reporters/json.ts b/packages/playwright/src/reporters/json.ts
index df66bf5d4b..e2b7ddf872 100644
--- a/packages/playwright/src/reporters/json.ts
+++ b/packages/playwright/src/reporters/json.ts
@@ -222,8 +222,7 @@ class JSONReporter implements ReporterV2 {
   }
 
   private _serializeError(error: TestError): JSONReportError {
-    const { message, location } = formatError(error, true);
-    return { message, location };
+    return formatError(error, true);
   }
 
   private _serializeTestStep(step: TestStep): JSONReportTestStep {