diff --git a/.github/workflows/pre-review.yml b/.github/workflows/pre-review.yml
index cc9d5cd9090..54c0951bf1a 100644
--- a/.github/workflows/pre-review.yml
+++ b/.github/workflows/pre-review.yml
@@ -111,6 +111,7 @@ jobs:
         uses: gradle/actions/setup-gradle@9e899d11ad247ec76be7a60bc1cf9d3abbb9e7f1
         with:
           cache-disabled: true
+          add-job-summary: on-failure
       - name: List unit tests
         run: ./gradlew test --test-dry-run -Dorg.gradle.parallel=true -Dorg.gradle.caching=true
       - name: Extract current test list
@@ -177,3 +178,17 @@ jobs:
             || contains(needs.*.result, 'cancelled')
             || contains(needs.*.result, 'skipped')
           }}
+      - name: Checkout Repo
+        if: always()
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.ref }}
+      - name: Download all unit test results
+        if: always()
+        uses: actions/download-artifact@eaceaf801fd36c7dee90939fad912460b18a1ffe
+        with:
+          pattern: unit-*-test-results
+          merge-multiple: true
+      - name: Report 10 slowest tests
+        if: always()
+        run: python3 .github/workflows/reportSlowestTests.sh 10
diff --git a/.github/workflows/reportSlowestTests.sh b/.github/workflows/reportSlowestTests.sh
new file mode 100755
index 00000000000..36d8d009398
--- /dev/null
+++ b/.github/workflows/reportSlowestTests.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+##
+## Copyright contributors to Besu.
+##
+## Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+## the License. You may obtain a copy of the License at
+##
+## http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+## an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+## specific language governing permissions and limitations under the License.
+##
+## SPDX-License-Identifier: Apache-2.0
+##
+
+import glob
+import os
+import sys
+import xml.etree.ElementTree as ET
+
+count = int(sys.argv[1]) if len(sys.argv) > 1 else 10
+runner = sys.argv[2] if len(sys.argv) > 2 else None
+
+results = []
+total_tests = 0
+for f in glob.glob('**/build/test-results/**/TEST-*.xml', recursive=True):
+    try:
+        tree = ET.parse(f)
+    except ET.ParseError:
+        continue
+    root = tree.getroot()
+    suites = root.findall('testsuite') if root.tag == 'testsuites' else [root]
+    for suite in suites:
+        name = suite.get('name')
+        time = suite.get('time')
+        if name and time:
+            try:
+                results.append((float(time), name))
+                total_tests += int(suite.get('tests', 0))
+            except ValueError:
+                pass
+
+if not results:
+    sys.exit(0)
+
+results.sort(reverse=True)
+total_classes = len(results)
+
+heading = f'{count} Slowest Test Classes (runner {runner})' if runner else f'{count} Slowest Test Classes'
+summary_line = f'{total_tests:,} tests across {total_classes} classes'
+lines = [
+    f'<details open>\n',
+    f'<summary><b>{heading}</b> — {summary_line}</summary>\n\n',
+    '| Rank | Class | Time |\n',
+    '|------|-------|------|\n',
+]
+for i, (t, name) in enumerate(results[:count], 1):
+    mins = int(t // 60)
+    secs = t % 60
+    time_str = f'{mins}m {secs:.0f}s' if mins else f'{secs:.1f}s'
+    short = name.split('.')[-1]
+    lines.append(f'| {i} | `{short}` | {time_str} |\n')
+lines.append('\n</details>\n')
+
+summary_path = os.environ.get('GITHUB_STEP_SUMMARY')
+if summary_path:
+    with open(summary_path, 'a', encoding='utf-8') as f:
+        f.writelines(lines)
+else:
+    sys.stdout.writelines(lines)