diff --git a/core/tests/Drupal/KernelTests/Core/Path/AliasWhitelistTest.php b/core/tests/Drupal/KernelTests/Core/Path/AliasWhitelistTest.php
new file mode 100644
index 0000000000..1c14f69f52
--- /dev/null
+++ b/core/tests/Drupal/KernelTests/Core/Path/AliasWhitelistTest.php
@@ -0,0 +1,83 @@
+<?php
+
+namespace Drupal\KernelTests\Core\Path;
+
+use Drupal\Core\Cache\MemoryCounterBackend;
+use Drupal\Core\Path\AliasStorage;
+use Drupal\Core\Database\Database;
+use Drupal\Core\Path\AliasManager;
+use Drupal\Core\Path\AliasWhitelist;
+
+/**
+ * Tests path alias CRUD and lookup functionality.
+ *
+ * @group Path
+ */
+class AliasWhitelistTest extends PathUnitTestBase {
+
+  /**
+   * Tests the alias whitelist.
+   */
+  public function testWhitelistCacheCorruption() {
+    // Prepare database table.
+    $connection = Database::getConnection();
+    $this->fixtures->createTables($connection);
+
+    $memoryCounterBackend = new MemoryCounterBackend();
+
+    // Create AliasManager and Path object.
+    $aliasStorage = new AliasStorage($connection, $this->container->get('module_handler'));
+    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $aliasStorage);
+    $aliasManager = new AliasManager($aliasStorage, $whitelist, $this->container->get('language_manager'), $memoryCounterBackend);
+
+    // Whitelist cache should not exist at all yet.
+    $this->assertFalse($memoryCounterBackend->get('path_alias_whitelist'));
+
+    // Add an alias for an admin path and user path.
+    $aliasStorage->save('/admin/something', '/' . $this->randomMachineName());
+    $aliasStorage->save('/user/something', '/' . $this->randomMachineName());
+    $aliasManager->cacheClear();
+
+    // Lookup admin path in whitelist. It will query the DB and figure out
+    // that it indeed has an alias, and add it to the internal whitelist and
+    // flag it to be peristed to cache.
+    $this->assertTrue($whitelist->get('admin'));
+
+    // Destruct the whitelist so it persists its cache.
+    $whitelist->destruct();
+    $this->assertEquals($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 1);
+    // Cache data should have data for 'user' and 'admin', even though just
+    // 'admin' was looked up. This is because the cache is primed with all
+    // menu router base paths.
+    $this->assertEquals(['user' => FALSE, 'admin' => TRUE], $memoryCounterBackend->get('path_alias_whitelist')->data);
+    $memoryCounterBackend->resetCounter();
+
+    // Re-initialize the the whitelist and lookup an alias for the 'user' path.
+    // Whitelist should load data from its cache, see that it hasn't done a
+    // check for 'user' yet, perform the check, then mark the result to be
+    // persisted to cache.
+    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $aliasStorage);
+    $this->assertTrue($whitelist->get('user'));
+
+    // Delete the whitelist cache. This could happen from an outside process,
+    // like a code deployment that performs a cache rebuild.
+    $memoryCounterBackend->delete('path_alias_whitelist');
+
+    // Destruct whitelist so it saves to the whitelist data to cache.
+    // Usually it combines existing cache data with the new data, but we just
+    // cleared the existing cache data.
+    $whitelist->destruct();
+    $this->assertEquals($memoryCounterBackend->getCounter('set', 'path_alias_whitelist'), 1);
+
+    // Now, the data written to cache is corrupted. It contains data for
+    // the 'admin' path but not the 'user' path.
+    $this->assertEquals(['user' => TRUE], $memoryCounterBackend->get('path_alias_whitelist')->data);
+
+    // Subsequent lookups for admin path will always return false, even though
+    // there ARE aliases for admin paths. Only way to fix is another cache
+    // clear.
+    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $aliasStorage);
+    $this->assertFalse($whitelist->get('admin'));
+  }
+
+}