diff --git a/core/tests/UserClassTest.php b/core/tests/UserClassTest.php
new file mode 100644
index 00000000..84f06aee
--- /dev/null
+++ b/core/tests/UserClassTest.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shimmie2;
+
+use PHPUnit\Framework\TestCase;
+
+require_once "core/userclass.php";
+
+class UserClassTest extends ShimmiePHPUnitTestCase
+{
+    public function test_new_class(): void
+    {
+        $cls = new UserClass("user2", "user", [
+            Permissions::CREATE_COMMENT => true,
+            Permissions::BIG_SEARCH => false,
+        ]);
+        $this->assertEquals("user2", $cls->name);
+        $this->assertTrue($cls->can(Permissions::CREATE_COMMENT));
+        $this->assertFalse($cls->can(Permissions::BIG_SEARCH));
+    }
+
+    public function test_not_found(): void
+    {
+        $cls = UserClass::$known_classes['user'];
+        $this->assertException(ServerError::class, function () use ($cls) {
+            $cls->can("not_found");
+        });
+    }
+
+    public function test_permissions(): void
+    {
+        $cls = UserClass::$known_classes['user'];
+        $ps = $cls->permissions();
+        $this->assertContains(Permissions::CREATE_COMMENT, $ps);
+    }
+}
diff --git a/core/userclass.php b/core/userclass.php
index 40fdc05d..530b9454 100644
--- a/core/userclass.php
+++ b/core/userclass.php
@@ -44,7 +44,6 @@ class UserClass
     #[Field(type: "[Permission!]!")]
     public function permissions(): array
     {
-        global $_all_false;
         $perms = [];
         foreach ((new \ReflectionClass(Permissions::class))->getConstants() as $k => $v) {
             if ($this->can($v)) {
@@ -90,6 +89,7 @@ foreach ((new \ReflectionClass(Permissions::class))->getConstants() as $k => $v)
 $_all_true[Permissions::HELLBANNED] = false;
 new UserClass("base", null, $_all_false);
 new UserClass("admin", null, $_all_true);
+unset($_all_true);
 unset($_all_false);
 
 // Ghost users can't do anything