diff --git a/scrapy/spiders/__init__.py b/scrapy/spiders/__init__.py
index 761e2e8e8..2b8c956c1 100644
--- a/scrapy/spiders/__init__.py
+++ b/scrapy/spiders/__init__.py
@@ -12,6 +12,7 @@ from twisted.internet.defer import Deferred
 
 from scrapy import signals
 from scrapy.http import Request, Response
+from scrapy.utils.python import global_object_name
 from scrapy.utils.trackref import object_ref
 from scrapy.utils.url import url_is_from_spider
 
@@ -52,6 +53,8 @@ class Spider(object_ref):
     def __init__(self, name: Optional[str] = None, **kwargs: Any):
         if name is not None:
             self.name = name
+        elif not getattr(self, "name", None):
+            self.name = global_object_name(self.__class__)
         self.__dict__.update(kwargs)
         if not hasattr(self, "start_urls"):
             self.start_urls: List[str] = []
diff --git a/tests/test_spider.py b/tests/test_spider.py
index fbc2a43bb..bbb52612e 100644
--- a/tests/test_spider.py
+++ b/tests/test_spider.py
@@ -24,6 +24,7 @@ from scrapy.spiders import (
     XMLFeedSpider,
 )
 from scrapy.spiders.init import InitSpider
+from scrapy.utils.python import global_object_name
 from scrapy.utils.test import get_crawler
 from tests import get_testdata
 
@@ -54,8 +55,9 @@ class SpiderTest(unittest.TestCase):
         self.assertEqual(spider.foo, "bar")
 
     def test_spider_without_name(self):
+        self.assertFalse(hasattr(self.spider_class, "name"))
         spider = self.spider_class()
-        self.assertFalse(hasattr(spider, "name"))
+        self.assertEqual(spider.name, global_object_name(self.spider_class))
 
     def test_from_crawler_crawler_and_settings_population(self):
         crawler = get_crawler()