diff --git a/test/tests/Util/Redactor/ProjectZomboidRedactorIntegrationTest.php b/test/tests/Util/Redactor/ProjectZomboidRedactorIntegrationTest.php
index be54778..6b94d02 100644
--- a/test/tests/Util/Redactor/ProjectZomboidRedactorIntegrationTest.php
+++ b/test/tests/Util/Redactor/ProjectZomboidRedactorIntegrationTest.php
@@ -69,6 +69,38 @@ class ProjectZomboidRedactorIntegrationTest extends TestCase
         ];
     }
 
+    /**
+     * Yields [fixturePath] for the subset of fixtures where every synthetic
+     * player name (Player1 / Player2 / AdminUser / PlayerSuspect) appears
+     * exclusively in a context the redactor recognises:
+     *
+     *   - chat:  ChatMessage{author='...'} envelope
+     *   - cmd, item, map, user:  77-char-Steam-ID followed by "..." quoted name
+     *
+     * Fixtures intentionally excluded:
+     *
+     *   - admin:          names appear in free-text positions (no Steam-ID anchor,
+     *                     no quotes, no Combat:/Safety: prefix). Names survive in v1.
+     *   - client-action,
+     *     perk:           names appear inside [...] brackets, not "..." quotes.
+     *                     PLAYER_AFTER_STEAMID_REGEX requires double-quotes.
+     *   - pvp:            attacker name redacts but victim name after `hit "..."`
+     *                     survives in v1 (Task 3 limitation).
+     *   - burd-journals,
+     *     debug-server:   no synthetic player names present.
+     */
+    public static function fixturesWhereAllNamesAreInCoveredContextsProvider(): array
+    {
+        $dir = self::$fixturesDir;
+        return [
+            'chat' => [$dir . '/chat-minimal.txt'],
+            'cmd'  => [$dir . '/cmd-minimal.txt'],
+            'item' => [$dir . '/item-minimal.txt'],
+            'map'  => [$dir . '/map-minimal.txt'],
+            'user' => [$dir . '/user-minimal.txt'],
+        ];
+    }
+
     /**
      * Yields [fixturePath, logClass] for the fixtures whose log class parses
      * them. All 11 fixtures are represented.
@@ -202,4 +234,39 @@ class ProjectZomboidRedactorIntegrationTest extends TestCase
             ),
         );
     }
+
+    // ---------------------------------------------------------------------------
+    // Test 4 — Player-name collapse in fully-covered fixtures
+    // ---------------------------------------------------------------------------
+
+    /**
+     * For fixtures where every synthetic player name appears exclusively in a
+     * context the redactor recognises, no synthetic name should remain after
+     * redaction.
+     *
+     * This addresses observation #3 from the final code review (the integration
+     * tests previously asserted Steam-ID elimination + structural preservation
+     * + idempotence, but did not directly verify name collapse). The unit tests
+     * in ProjectZomboidRedactorPlayerNameTest cover this property exhaustively
+     * per-context; this integration test re-verifies it end-to-end against the
+     * fixtures that ride into iblogs.
+     */
+    #[DataProvider('fixturesWhereAllNamesAreInCoveredContextsProvider')]
+    public function testFixturePlayerNamesCollapseInCoveredContexts(string $fixturePath): void
+    {
+        $content = (new PathLogFile($fixturePath))->getContent();
+        $redacted = $this->redact($content);
+
+        foreach (['Player1', 'Player2', 'AdminUser', 'PlayerSuspect'] as $name) {
+            $this->assertStringNotContainsString(
+                $name,
+                $redacted,
+                sprintf(
+                    'Fixture "%s": synthetic name %s survived redaction. Every name in this fixture should appear only in a covered lexical context.',
+                    basename($fixturePath),
+                    $name,
+                ),
+            );
+        }
+    }
 }