diff --git a/src/Integrations/Divi/Design/DesignLock.php b/src/Integrations/Divi/Design/DesignLock.php
index aaaf926..747d1fb 100644
--- a/src/Integrations/Divi/Design/DesignLock.php
+++ b/src/Integrations/Divi/Design/DesignLock.php
@@ -9,9 +9,13 @@ use InvalidArgumentException;
 defined('ABSPATH') || exit;
 
 /**
- * One confirmed change per design area at a time (final review I-5): an option lit_mcp_lock_<area> (never
- * autoloaded) holds the time the lock was taken. add_option() is atomic – it fails while the option exists. A lock
- * older than STALE_AFTER seconds (a request that died) is removed and taken once more.
+ * One confirmed change per lock at a time (final review I-5). Colors and theme options share ONE lock (audit L5):
+ * both rewrite the whole et_divi array through et_update_option(). The lock is a row lit_mcp_lock_<name> (never
+ * autoloaded) in the options table holding "<time>:<token>" – taken with an atomic INSERT IGNORE like
+ * DiviCheckRoute (add_option() reads first and writes after, so two requests could both win; audit L6). A lock
+ * older than STALE_AFTER seconds (a request that died) is taken over with a conditional UPDATE on the value just
+ * read, so only one taker wins; release() deletes the row only while it still holds this instance's token, so a
+ * holder that lost a stale lock cannot free the new holder's.
  */
 final class DesignLock
 {
@@ -19,6 +23,12 @@ final class DesignLock
 
     private const PREFIX = 'lit_mcp_lock_';
 
+    /** Areas that write the same Divi option share one lock. */
+    private const SHARED = ['colors' => 'divi_options', 'theme_options' => 'divi_options'];
+
+    /** @var array<string, string> Lock option => token this instance holds */
+    private array $tokens = [];
+
     /** @throws InvalidArgumentException For an area outside SnapshotStore::AREAS. */
     public static function option(string $area): string
     {
@@ -26,27 +36,63 @@ final class DesignLock
             throw new InvalidArgumentException(sprintf('Unknown design area "%s".', $area));
         }
 
-        return self::PREFIX . $area;
+        return self::PREFIX . (self::SHARED[$area] ?? $area);
     }
 
     public function acquire(string $area): bool
     {
+        global $wpdb;
+
         $option = self::option($area);
-        if (add_option($option, time(), '', false)) {
-            return true;
+        $token = time() . ':' . bin2hex(random_bytes(4));
+        $taken = $this->insert($wpdb, $option, $token);
+        if (! $taken) {
+            $since = $wpdb->get_var($wpdb->prepare(
+                "SELECT option_value FROM {$wpdb->options} WHERE option_name = %s",
+                $option
+            ));
+            if ($since === null) {
+                // Released between our failed insert and this read; try once more.
+                $taken = $this->insert($wpdb, $option, $token);
+            } elseif (time() - (int) $since > self::STALE_AFTER) {
+                $taken = (int) $wpdb->query($wpdb->prepare(
+                    "UPDATE {$wpdb->options} SET option_value = %s WHERE option_name = %s AND option_value = %s",
+                    $token,
+                    $option,
+                    $since
+                )) === 1;
+            }
+        }
+        if ($taken) {
+            $this->tokens[$option] = $token;
         }
 
-        $since = get_option($option, 0);
-        if (is_numeric($since) && time() - (int) $since <= self::STALE_AFTER) {
-            return false;
-        }
-        delete_option($option);
-
-        return add_option($option, time(), '', false);
+        return $taken;
     }
 
     public function release(string $area): void
     {
-        delete_option(self::option($area));
+        global $wpdb;
+
+        $option = self::option($area);
+        $token = $this->tokens[$option] ?? null;
+        unset($this->tokens[$option]);
+        if ($token !== null) {
+            $wpdb->query($wpdb->prepare(
+                "DELETE FROM {$wpdb->options} WHERE option_name = %s AND option_value = %s",
+                $option,
+                $token
+            ));
+        }
+    }
+
+    /** INSERT IGNORE: 1 row affected = the lock did not exist and is now ours. */
+    private function insert(\wpdb $wpdb, string $option, string $token): bool
+    {
+        return (int) $wpdb->query($wpdb->prepare(
+            "INSERT IGNORE INTO {$wpdb->options} (option_name, option_value, autoload) VALUES (%s, %s, 'no')",
+            $option,
+            $token
+        )) === 1;
     }
 }
diff --git a/src/Uninstaller.php b/src/Uninstaller.php
index 18b73f8..29126c1 100644
--- a/src/Uninstaller.php
+++ b/src/Uninstaller.php
@@ -37,7 +37,7 @@ final class Uninstaller
         'lit_mcp_divi_releases', 'lit_mcp_divi_check_report', 'lit_mcp_divi_check_lock',
         'lit_mcp_snapshots_colors', 'lit_mcp_snapshots_variables', 'lit_mcp_snapshots_presets',
         'lit_mcp_snapshots_theme_options',
-        'lit_mcp_lock_colors', 'lit_mcp_lock_variables', 'lit_mcp_lock_presets', 'lit_mcp_lock_theme_options',
+        'lit_mcp_lock_divi_options', 'lit_mcp_lock_variables', 'lit_mcp_lock_presets',
     ];
     private const TRANSIENTS = ['lit_mcp_endpoint_check', 'lit_mcp_divi_state'];
     private const CRON_HOOK = 'lit_mcp_log_cleanup';
diff --git a/tests/Support/LockTable.php b/tests/Support/LockTable.php
new file mode 100644
index 0000000..4a29888
--- /dev/null
+++ b/tests/Support/LockTable.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Support;
+
+/**
+ * In-memory options table as $GLOBALS['wpdb'] that understands the three statements of DesignLock (INSERT IGNORE,
+ * conditional UPDATE, DELETE by token). $beforeInsert runs before a lock is inserted (a parallel request).
+ */
+final class LockTable extends \wpdb
+{
+    /** @var array<string, string> option_name => option_value */
+    public array $rows = [];
+
+    public ?\Closure $beforeInsert = null;
+
+    public static function install(): self
+    {
+        return $GLOBALS['wpdb'] = new self();
+    }
+
+    public function query($sql)
+    {
+        if (preg_match("/^INSERT IGNORE .* VALUES \('([^']*)', '([^']*)', 'no'\)$/", $sql, $m) === 1) {
+            if ($this->beforeInsert !== null) {
+                ($this->beforeInsert)();
+            }
+            if (isset($this->rows[$m[1]])) {
+                return 0;
+            }
+            $this->rows[$m[1]] = $m[2];
+
+            return 1;
+        }
+        $update = "/^UPDATE .* SET option_value = '([^']*)' WHERE option_name = '([^']*)' AND option_value = '([^']*)'$/";
+        if (preg_match($update, $sql, $m) === 1) {
+            if (($this->rows[$m[2]] ?? null) !== $m[3]) {
+                return 0;
+            }
+            $this->rows[$m[2]] = $m[1];
+
+            return 1;
+        }
+        $delete = "/^DELETE FROM .* WHERE option_name = '([^']*)' AND option_value = '([^']*)'$/";
+        if (preg_match($delete, $sql, $m) === 1 && ($this->rows[$m[1]] ?? null) === $m[2]) {
+            unset($this->rows[$m[1]]);
+
+            return 1;
+        }
+
+        return 0;
+    }
+
+    public function get_var($sql = null, $x = 0, $y = 0)
+    {
+        preg_match("/option_name = '([^']*)'/", (string) $sql, $m);
+
+        return $this->rows[$m[1]] ?? null;
+    }
+}
diff --git a/tests/Unit/Integrations/Divi/Design/DesignChangeTest.php b/tests/Unit/Integrations/Divi/Design/DesignChangeTest.php
index c0ea7ff..40a9ea1 100644
--- a/tests/Unit/Integrations/Divi/Design/DesignChangeTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DesignChangeTest.php
@@ -19,6 +19,7 @@ use LIT\MCP\Integrations\Divi\Release\ReleaseStatus;
 use LIT\MCP\Abilities\WriteFailed;
 use LIT\MCP\Tests\Support\FakeChangeLog;
 use LIT\MCP\Tests\Support\ReleaseMatrices;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 use Brain\Monkey\Functions;
 use Mockery;
@@ -26,27 +27,18 @@ use RuntimeException;
 
 final class DesignChangeTest extends TestCase
 {
-    /** @var array<string, mixed> Options as add_option()/delete_option() see them (DesignLock). */
-    private array $options = [];
+    private LockTable $table;
 
     protected function setUp(): void
     {
         parent::setUp();
-        $this->options = [];
-        Functions\when('add_option')->alias(function (string $name, mixed $value = ''): bool {
-            if (array_key_exists($name, $this->options)) {
-                return false;
-            }
-            $this->options[$name] = $value;
+        $this->table = LockTable::install();
+    }
 
-            return true;
-        });
-        Functions\when('get_option')->alias(fn (string $name, mixed $default = false): mixed => $this->options[$name] ?? $default);
-        Functions\when('delete_option')->alias(function (string $name): bool {
-            unset($this->options[$name]);
-
-            return true;
-        });
+    protected function tearDown(): void
+    {
+        unset($GLOBALS['wpdb']);
+        parent::tearDown();
     }
 
     /**
@@ -216,7 +208,7 @@ final class DesignChangeTest extends TestCase
     /** Final review I-5: a confirm while another change of the area runs writes nothing. */
     public function testAHeldLockRefusesTheConfirm(): void
     {
-        $this->options['lit_mcp_lock_presets'] = time();
+        $this->table->rows['lit_mcp_lock_presets'] = time() . ':foreign';
         $stored = ['v' => 1];
         $area = self::area($stored);
         $snapshots = Mockery::mock(SnapshotStore::class);
@@ -233,7 +225,7 @@ final class DesignChangeTest extends TestCase
         self::assertSame(409, $result->get_error_data()['status']);
         self::assertStringContainsString('andere Änderung an den Presets', $result->get_error_message());
         self::assertSame([], $area->writes);
-        self::assertArrayHasKey('lit_mcp_lock_presets', $this->options, 'a foreign lock is not released');
+        self::assertArrayHasKey('lit_mcp_lock_presets', $this->table->rows, 'a foreign lock is not released');
     }
 
     public function testTheLockIsHeldWhileWritingAndReleasedAfterSuccess(): void
@@ -242,12 +234,12 @@ final class DesignChangeTest extends TestCase
         $area = self::area($stored);
         $snapshots = Mockery::mock(SnapshotStore::class);
         $snapshots->expects('save')->andReturnUsing(function (): string {
-            self::assertArrayHasKey('lit_mcp_lock_presets', $this->options, 'snapshot under the lock');
+            self::assertArrayHasKey('lit_mcp_lock_presets', $this->table->rows, 'snapshot under the lock');
 
             return 'presets-1';
         });
         $snapshots->expects('attachLog')->andReturnUsing(function (): void {
-            self::assertArrayHasKey('lit_mcp_lock_presets', $this->options, 'log under the lock');
+            self::assertArrayHasKey('lit_mcp_lock_presets', $this->table->rows, 'log under the lock');
         });
 
         $result = (new DesignChange($snapshots, new FakeChangeLog(9)))->run(
@@ -258,7 +250,7 @@ final class DesignChangeTest extends TestCase
         );
 
         self::assertTrue($result['ok']);
-        self::assertArrayNotHasKey('lit_mcp_lock_presets', $this->options);
+        self::assertArrayNotHasKey('lit_mcp_lock_presets', $this->table->rows);
     }
 
     public function testTheLockIsReleasedAfterAFailedWrite(): void
@@ -277,7 +269,7 @@ final class DesignChangeTest extends TestCase
             );
             self::fail('expected WriteFailed');
         } catch (WriteFailed) {
-            self::assertArrayNotHasKey('lit_mcp_lock_presets', $this->options);
+            self::assertArrayNotHasKey('lit_mcp_lock_presets', $this->table->rows);
         }
     }
 
@@ -289,12 +281,9 @@ final class DesignChangeTest extends TestCase
         $rev = $area->rev($stored);
         $snapshots = Mockery::mock(SnapshotStore::class);
         $snapshots->shouldNotReceive('save');
-        Functions\when('add_option')->alias(function (string $name, mixed $value = '') use (&$stored): bool {
+        $this->table->beforeInsert = static function () use (&$stored): void {
             $stored = ['v' => 'parallel'];
-            $this->options[$name] = $value;
-
-            return true;
-        });
+        };
 
         $result = (new DesignChange($snapshots, FakeChangeLog::forbidden()))->run(
             'lit/divi-presets-set',
@@ -305,7 +294,7 @@ final class DesignChangeTest extends TestCase
 
         self::assertToolError($result, 'rev_mismatch');
         self::assertSame([], $area->writes);
-        self::assertArrayNotHasKey('lit_mcp_lock_presets', $this->options);
+        self::assertArrayNotHasKey('lit_mcp_lock_presets', $this->table->rows);
     }
 
     public function testBlockedUsagesRefuseTheConfirm(): void
diff --git a/tests/Unit/Integrations/Divi/Design/DesignLockTest.php b/tests/Unit/Integrations/Divi/Design/DesignLockTest.php
index 7e63891..dc260aa 100644
--- a/tests/Unit/Integrations/Divi/Design/DesignLockTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DesignLockTest.php
@@ -7,65 +7,89 @@ namespace LIT\MCP\Tests\Unit\Integrations\Divi\Design;
 use Brain\Monkey\Functions;
 use InvalidArgumentException;
 use LIT\MCP\Integrations\Divi\Design\DesignLock;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 
+/** Audits L5/L6: one shared lock for colors and theme options; atomic acquire and token-checked release. */
 final class DesignLockTest extends TestCase
 {
-    /** @var array<string, mixed> */
-    private array $options = [];
-
-    protected function setUp(): void
+    private function table(): LockTable
     {
-        parent::setUp();
-        $this->options = [];
-        Functions\when('add_option')->alias(function (string $name, mixed $value = '', string $unused = '', mixed $autoload = null): bool {
-            self::assertFalse($autoload, 'locks are never autoloaded');
-            if (array_key_exists($name, $this->options)) {
-                return false;
-            }
-            $this->options[$name] = $value;
+        return LockTable::install();
+    }
 
-            return true;
-        });
-        Functions\when('get_option')->alias(fn (string $name, mixed $default = false): mixed => $this->options[$name] ?? $default);
-        Functions\when('delete_option')->alias(function (string $name): bool {
-            unset($this->options[$name]);
-
-            return true;
-        });
+    protected function tearDown(): void
+    {
+        unset($GLOBALS['wpdb']);
+        parent::tearDown();
     }
 
     public function testAcquireIsExclusiveUntilReleased(): void
     {
+        $db = $this->table();
         $lock = new DesignLock();
 
         self::assertTrue($lock->acquire('presets'));
-        self::assertIsInt($this->options['lit_mcp_lock_presets']);
-        self::assertFalse($lock->acquire('presets'));
-        self::assertTrue($lock->acquire('colors'), 'areas lock independently');
+        self::assertMatchesRegularExpression('/^\d+:[0-9a-f]{8}$/', $db->rows['lit_mcp_lock_presets']);
+        self::assertFalse((new DesignLock())->acquire('presets'));
+        self::assertTrue($lock->acquire('variables'), 'areas lock independently');
 
         $lock->release('presets');
-        self::assertTrue($lock->acquire('presets'));
+        self::assertSame([], array_diff_key($db->rows, ['lit_mcp_lock_variables' => 1]));
+        self::assertTrue((new DesignLock())->acquire('presets'));
     }
 
-    public function testAStaleLockIsTakenOver(): void
+    /** Audit L5: both areas rewrite the whole et_divi array, so they exclude each other. */
+    public function testColorsAndThemeOptionsShareOneLock(): void
     {
-        $this->options['lit_mcp_lock_presets'] = time() - DesignLock::STALE_AFTER - 1;
+        $this->table();
+
+        self::assertSame(DesignLock::option('colors'), DesignLock::option('theme_options'));
+        self::assertTrue((new DesignLock())->acquire('colors'));
+        self::assertFalse((new DesignLock())->acquire('theme_options'));
+        self::assertTrue((new DesignLock())->acquire('variables'));
+    }
+
+    public function testAStaleLockIsTakenOverExactlyOnce(): void
+    {
+        $db = $this->table();
+        $db->rows['lit_mcp_lock_presets'] = (time() - DesignLock::STALE_AFTER - 1) . ':old';
 
         self::assertTrue((new DesignLock())->acquire('presets'));
-        self::assertGreaterThan(time() - 5, $this->options['lit_mcp_lock_presets']);
+        self::assertGreaterThan(time() - 5, (int) $db->rows['lit_mcp_lock_presets']);
+        self::assertFalse((new DesignLock())->acquire('presets'), 'the second taker sees a fresh lock');
+    }
+
+    /** Audit L6: a holder whose lock went stale and was taken over must not free the new holder's lock. */
+    public function testReleaseOnlyDeletesTheOwnToken(): void
+    {
+        $db = $this->table();
+        $old = new DesignLock();
+        self::assertTrue($old->acquire('presets'));
+        $db->rows['lit_mcp_lock_presets'] = (time() - DesignLock::STALE_AFTER - 1) . ':x';
+        $new = new DesignLock();
+        self::assertTrue($new->acquire('presets'));
+
+        $old->release('presets');
+
+        self::assertArrayHasKey('lit_mcp_lock_presets', $db->rows);
+        self::assertFalse((new DesignLock())->acquire('presets'));
+        $new->release('presets');
+        self::assertArrayNotHasKey('lit_mcp_lock_presets', $db->rows);
     }
 
     public function testAFreshLockIsNotTakenOver(): void
     {
-        $this->options['lit_mcp_lock_presets'] = time() - 10;
+        $db = $this->table();
+        $db->rows['lit_mcp_lock_presets'] = (time() - 10) . ':x';
 
         self::assertFalse((new DesignLock())->acquire('presets'));
     }
 
     public function testOptionNamesAndUnknownAreas(): void
     {
-        self::assertSame('lit_mcp_lock_theme_options', DesignLock::option('theme_options'));
+        self::assertSame('lit_mcp_lock_divi_options', DesignLock::option('theme_options'));
+        self::assertSame('lit_mcp_lock_presets', DesignLock::option('presets'));
 
         $this->expectException(InvalidArgumentException::class);
         DesignLock::option('pages');
diff --git a/tests/Unit/Integrations/Divi/Design/DiviColorsSetAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviColorsSetAbilityTest.php
index 1f53657..0e8e57c 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviColorsSetAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviColorsSetAbilityTest.php
@@ -21,6 +21,7 @@ use LIT\MCP\Integrations\Divi\Library\GlobalUsages;
 use LIT\MCP\Integrations\Divi\Library\UsageReport;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 use RuntimeException;
@@ -37,8 +38,7 @@ final class DiviColorsSetAbilityTest extends TestCase
     {
         parent::setUp();
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
         Functions\when('current_user_can')->justReturn(true);
         $this->stored = ColorAreaTest::stored();
         $this->saves = [];
diff --git a/tests/Unit/Integrations/Divi/Design/DiviDesignDetachAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviDesignDetachAbilityTest.php
index 8cbe831..b378fc9 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviDesignDetachAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviDesignDetachAbilityTest.php
@@ -26,6 +26,7 @@ use LIT\MCP\Integrations\Divi\Release\DiviFeature;
 use LIT\MCP\Integrations\Divi\Release\DiviLocked;
 use LIT\MCP\Integrations\Divi\Release\ReleaseState;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Support\ReleaseMatrices;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
@@ -46,8 +47,7 @@ final class DiviDesignDetachAbilityTest extends TestCase
         parent::setUp();
         Functions\when('current_user_can')->justReturn(true);
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
     }
 
     private function ability(
diff --git a/tests/Unit/Integrations/Divi/Design/DiviDesignRestoreAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviDesignRestoreAbilityTest.php
index 5503aab..9715944 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviDesignRestoreAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviDesignRestoreAbilityTest.php
@@ -20,6 +20,7 @@ use LIT\MCP\Integrations\Divi\Design\ThemeOptionsRestorePlanner;
 use LIT\MCP\Integrations\Divi\Design\VariableRestorePlanner;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 use Mockery\MockInterface;
@@ -30,8 +31,7 @@ final class DiviDesignRestoreAbilityTest extends TestCase
     {
         parent::setUp();
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
     }
 
     public function testRestoresWithDryRunAndASnapshotOfTheCurrentState(): void
diff --git a/tests/Unit/Integrations/Divi/Design/DiviPresetsDeleteAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviPresetsDeleteAbilityTest.php
index 611e4f8..1b627cd 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviPresetsDeleteAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviPresetsDeleteAbilityTest.php
@@ -13,6 +13,7 @@ use LIT\MCP\Integrations\Divi\Design\SnapshotStore;
 use LIT\MCP\Integrations\Divi\Library\GlobalUsages;
 use LIT\MCP\Integrations\Divi\Library\UsageReport;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 use ReflectionProperty;
@@ -23,8 +24,7 @@ final class DiviPresetsDeleteAbilityTest extends TestCase
     {
         parent::setUp();
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
     }
 
     private function ability(
diff --git a/tests/Unit/Integrations/Divi/Design/DiviPresetsSetAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviPresetsSetAbilityTest.php
index 1ca110c..805a968 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviPresetsSetAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviPresetsSetAbilityTest.php
@@ -18,6 +18,7 @@ use LIT\MCP\Integrations\Divi\Library\GlobalUsages;
 use LIT\MCP\Integrations\Divi\Library\UsageReport;
 use LIT\MCP\Integrations\Divi\Pages\DiviPageLoader;
 use LIT\MCP\Tests\Support\ComposeFixture;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Support\DiviFixtures;
 use LIT\MCP\Tests\Support\FakeChangeLog;
 use LIT\MCP\Tests\Unit\TestCase;
@@ -37,8 +38,7 @@ final class DiviPresetsSetAbilityTest extends TestCase
         $this->snapshots = Mockery::mock(SnapshotStore::class);
         Functions\when('current_user_can')->justReturn(true);
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
     }
 
     private function ability(bool $unfiltered = true, ?GlobalUsages $usages = null, ?DiviPageLoader $loader = null, ?DesignSystemWriter $writer = null): DiviPresetsSetAbility
diff --git a/tests/Unit/Integrations/Divi/Design/DiviThemeOptionsUpdateAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviThemeOptionsUpdateAbilityTest.php
index ba4ddcf..5f5fce8 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviThemeOptionsUpdateAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviThemeOptionsUpdateAbilityTest.php
@@ -19,6 +19,7 @@ use LIT\MCP\Integrations\Divi\Design\ThemeOptionsArea;
 use LIT\MCP\Integrations\Divi\Design\ThemeOptionSpec;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 use RuntimeException;
@@ -35,8 +36,7 @@ final class DiviThemeOptionsUpdateAbilityTest extends TestCase
     {
         parent::setUp();
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
         Functions\when('current_user_can')->justReturn(true);
         $this->stored = ThemeOptionsAreaTest::stored();
         $this->writes = [];
diff --git a/tests/Unit/Integrations/Divi/Design/DiviVariablesSetAbilityTest.php b/tests/Unit/Integrations/Divi/Design/DiviVariablesSetAbilityTest.php
index bed656a..230655e 100644
--- a/tests/Unit/Integrations/Divi/Design/DiviVariablesSetAbilityTest.php
+++ b/tests/Unit/Integrations/Divi/Design/DiviVariablesSetAbilityTest.php
@@ -20,6 +20,7 @@ use LIT\MCP\Integrations\Divi\Library\GlobalUsages;
 use LIT\MCP\Integrations\Divi\Library\UsageReport;
 use LIT\MCP\Integrations\Divi\Release\DiviFeature;
 use LIT\MCP\Tests\Support\FakeChangeLog;
+use LIT\MCP\Tests\Support\LockTable;
 use LIT\MCP\Tests\Unit\TestCase;
 use Mockery;
 use RuntimeException;
@@ -36,8 +37,7 @@ final class DiviVariablesSetAbilityTest extends TestCase
     {
         parent::setUp();
         // DesignLock (final review I-5): the lock is always free here.
-        Functions\when('add_option')->justReturn(true);
-        Functions\when('delete_option')->justReturn(true);
+        LockTable::install();
         Functions\when('current_user_can')->justReturn(true);
         $this->stored = VariableAreaTest::stored();
         $this->saves = [];
diff --git a/tests/Unit/UninstallTest.php b/tests/Unit/UninstallTest.php
index 118f445..8d05ea6 100644
--- a/tests/Unit/UninstallTest.php
+++ b/tests/Unit/UninstallTest.php
@@ -59,7 +59,6 @@ final class UninstallTest extends TestCase
             'lit_mcp_snapshots_colors', 'lit_mcp_snapshots_variables', 'lit_mcp_snapshots_presets',
             'lit_mcp_snapshots_theme_options',
             DesignLock::option('colors'), DesignLock::option('variables'), DesignLock::option('presets'),
-            DesignLock::option('theme_options'),
         ];
         self::assertSame(array_merge($own, $own), $deleted);
         self::assertNotContains('mcp_jwt_secret', $deleted);
diff --git a/tests/Unit/UninstallerTest.php b/tests/Unit/UninstallerTest.php
index 2570e3d..cd73d39 100644
--- a/tests/Unit/UninstallerTest.php
+++ b/tests/Unit/UninstallerTest.php
@@ -65,7 +65,6 @@ final class UninstallerTest extends TestCase
                 'lit_mcp_snapshots_colors', 'lit_mcp_snapshots_variables', 'lit_mcp_snapshots_presets',
                 'lit_mcp_snapshots_theme_options',
                 DesignLock::option('colors'), DesignLock::option('variables'), DesignLock::option('presets'),
-                DesignLock::option('theme_options'),
             ],
             $deleted
         );