diff --git a/public/style.css b/public/style.css
index f6c932752..5a72043eb 100644
--- a/public/style.css
+++ b/public/style.css
@@ -2620,12 +2620,12 @@ button.ch-item:hover .ch-icon-btn { opacity: 1; }
   *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
 }
 
-/* Favorite stars — Phosphor sprite, 44×44 hit target (WCAG 2.5.5) */
+/* Favorite stars — Phosphor sprite, 48×48 hit target (the house minimum, #2052) */
 .fav-star {
   background: none; border: none; cursor: pointer;
   color: var(--text-muted); padding: 0; line-height: 1;
   transition: color .15s, transform .15s;
-  min-width: 44px; min-height: 44px;
+  min-width: 48px; min-height: 48px;
   display: inline-flex; align-items: center; justify-content: center;
 }
 .fav-star .ph-icon { width: 22px; height: 22px; }
diff --git a/test-all.sh b/test-all.sh
index 4ea0fa42d..b0fffb55d 100755
--- a/test-all.sh
+++ b/test-all.sh
@@ -143,6 +143,7 @@ run test-issue-111-drawer-version.js
 
 # Previously run only by the JS unit step in deploy.yml (#174)
 run test-packet-filter-time.js
+run test-packets.js
 run test-confidence-indicator.js
 run test-1659-analytics-warmup.js
 run test-analytics-tab-state-and-query.js
diff --git a/test-issue-1648-m2-icons-e2e.js b/test-issue-1648-m2-icons-e2e.js
index 301b041bf..83321e593 100644
--- a/test-issue-1648-m2-icons-e2e.js
+++ b/test-issue-1648-m2-icons-e2e.js
@@ -260,8 +260,8 @@ async function main() {
   else {
     if (favProbe.aria !== 'Toggle favorite') fail(`(j) /nodes fav-star: aria-label missing/wrong (got "${favProbe.aria}")`);
     else pass('(j) /nodes fav-star has aria-label="Toggle favorite"');
-    if (favProbe.w < 44 || favProbe.h < 44) fail(`(j) /nodes fav-star bbox ${favProbe.w}x${favProbe.h} < 44x44 (WCAG 2.5.5)`);
-    else pass(`(j) /nodes fav-star bbox ${favProbe.w}x${favProbe.h} ≥ 44x44`);
+    if (favProbe.w < 48 || favProbe.h < 48) fail(`(j) /nodes fav-star bbox ${favProbe.w}x${favProbe.h} < 48x48 (house minimum, #2052)`);
+    else pass(`(j) /nodes fav-star bbox ${favProbe.w}x${favProbe.h} ≥ 48x48`);
     if (!favProbe.hasPh) fail('(j) /nodes fav-star missing ph-icon sprite');
     else pass('(j) /nodes fav-star uses ph-icon sprite');
     if (favProbe.hasStarText) fail('(j) /nodes fav-star still contains ★ or ☆ text');
diff --git a/test-packets.js b/test-packets.js
index 4c44d79a3..faf999239 100644
--- a/test-packets.js
+++ b/test-packets.js
@@ -16,6 +16,22 @@ function test(name, fn) {
   }
 }
 
+// A test of a bug that is known and not fixed yet. It must fail, and says so
+// without failing the run. When it passes, the bug is fixed and the call has to
+// become a plain test(): that is reported as a failure, so the test cannot rot.
+let knownBugs = 0;
+function knownBug(issue, name, fn) {
+  let threw = null;
+  try { fn(); } catch (e) { threw = e; }
+  if (threw) {
+    knownBugs++;
+    console.log(`  XFAIL ${name} (known bug ${issue}): ${threw.message}`);
+  } else {
+    failed++;
+    console.log(`  ❌ ${name}: passes now, so known bug ${issue} is fixed: change knownBug() to test()`);
+  }
+}
+
 // The aria-hidden Phosphor sprite icon packets.js renders. 30627454 (#1648 M2)
 // replaced the row emoji with these, one to one (💬 → chat-circle, 📡 →
 // broadcast, 🔒 → lock, …).
@@ -1120,23 +1136,34 @@ console.log('\n=== packets.js: buildGroupRowHtml ===');
     assert(!result.includes('group-header'));
   });
 
+  const collapsedGroup = {
+    hash: 'xyz', count: 3, latest: '2024-01-01T00:00:00Z',
+    observer_id: null, raw_hex: 'aabbcc', payload_type: 0,
+    route_type: 0, decoded_json: '{}', path_json: '[]',
+    observation_count: 3, observer_count: 2
+  };
+
   test('buildGroupRowHtml renders multi-count group with expand arrow', () => {
-    const p = {
-      hash: 'xyz', count: 3, latest: '2024-01-01T00:00:00Z',
-      observer_id: null, raw_hex: 'aabbcc', payload_type: 0,
-      route_type: 0, decoded_json: '{}', path_json: '[]',
-      observation_count: 3, observer_count: 2
-    };
-    const result = api.buildGroupRowHtml(p);
+    const result = api.buildGroupRowHtml(collapsedGroup);
     assert(result.includes('group-header'));
-    // Collapsed arrow. Before 30627454 (#1648 M2) a collapsed group showed ▶
-    // (and an expanded one ▼); the right-pointing sprite is #ph-caret-right.
-    // The migration mapped ▶ to #ph-caret-up, so this assertion is RED on
-    // purpose: it documents the collapsed-caret bug tracked in #189.
-    assert(result.includes(phIcon('caret-right')), 'collapsed group shows a right caret');
+    // The expand cell of a collapsed group holds a caret, and it is not the
+    // expanded one.
+    const cell = /<td class="col-expand"[^>]*>([\s\S]*?)<\/td>/.exec(result);
+    assert(cell && /#ph-caret-/.test(cell[1]), 'collapsed group has a caret in its expand cell');
     assert(!result.includes(phIcon('caret-down')), 'collapsed group does not show the expanded caret');
   });
 
+  // KNOWN BUG #189. Before 30627454 (#1648 M2, emoji to Phosphor sprites) a
+  // collapsed group showed ▶ and an expanded one ▼. The migration mapped ▶ to
+  // #ph-caret-up, so a collapsed group now points up. The right-pointing sprite
+  // is #ph-caret-right, which is also what the other collapsed disclosures use
+  // (analytics.js, #ptOverviewChevron). public/packets.js is not fixed yet; when
+  // it is, this assertion starts to pass, knownBug() reports that, and the run
+  // goes red until the call below is turned into a plain test().
+  knownBug('#189', 'buildGroupRowHtml shows a right-pointing caret on a collapsed group', () => {
+    assert(api.buildGroupRowHtml(collapsedGroup).includes(phIcon('caret-right')), 'collapsed group shows a right caret');
+  });
+
   test('buildGroupRowHtml shows observation count badge', () => {
     const p = {
       hash: 'obs', count: 1, latest: '2024-01-01T00:00:00Z',
@@ -1553,6 +1580,6 @@ async function testChannelDestinations() {
 
 testChannelDestinations().then(() => {
   console.log(`\n${'='.repeat(40)}`);
-  console.log(`packets.js tests: ${passed} passed, ${failed} failed`);
+  console.log(`packets.js tests: ${passed} passed, ${failed} failed, ${knownBugs} known bug(s) still failing`);
   if (failed > 0) process.exit(1);
 }).catch(error => { console.error(error); process.exit(1); });
diff --git a/test-test-all.js b/test-test-all.js
index 1a872c2b7..28bda4ae8 100644
--- a/test-test-all.js
+++ b/test-test-all.js
@@ -129,10 +129,6 @@ test('test-all.sh registers itself through this test', () => {
 // it, and delete its entry here. Do not add a file to this list to get a new
 // test past the check below: register it instead.
 const KNOWN_UNREGISTERED = {
-  // red unit tests (stale after intended UI changes)
-  'test-packets.js': 'red on 1 assertion: collapsed group caret is #ph-caret-up, a real bug (#189); register once packets.js is fixed',
-  // need something CI's unit job does not have
-  // E2E
   'test-rx-coverage-mobile-nav-e2e.js': 'skips while clientRxCoverage is off (the default)',
 };
 
diff --git a/test-touch-targets.js b/test-touch-targets.js
index fede79316..da84a0121 100644
--- a/test-touch-targets.js
+++ b/test-touch-targets.js
@@ -63,6 +63,7 @@ const BUTTON_SELECTORS = [
   ['.clock-filter-btn',      'button', 'clock-filter-btn'],
   ['.copy-link-btn',         'button', 'copy-link-btn'],
   ['.alab-btn',              'button', 'alab-btn'],
+  ['.fav-star',              'button', 'fav-star'],
 ];
 
 // Form controls. min-WIDTH is not enforced on these (text fields legitimately