diff --git a/accounts/tests.py b/accounts/tests.py
index f7c2b1d..2784463 100644
--- a/accounts/tests.py
+++ b/accounts/tests.py
@@ -56,7 +56,14 @@ class AccountTest(TestCase):
         user.is_superuser = True
         user.is_staff = True
         user.save()
+        category = Category()
+        category.name = "categoryaaa"
+        category.created_time = datetime.datetime.now()
+        category.last_mod_time = datetime.datetime.now()
+        category.save()
+
         article = Article()
+        article.category = category
         article.title = "nicetitle333"
         article.body = "nicecontentttt"
         article.author = user
diff --git a/blog/models.py b/blog/models.py
index 9a14f37..1dadbac 100644
--- a/blog/models.py
+++ b/blog/models.py
@@ -57,7 +57,7 @@ class Article(BaseModel):
     views = models.PositiveIntegerField('浏览量', default=0)
     author = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name='作者', on_delete=models.CASCADE)
 
-    category = models.ForeignKey('Category', verbose_name='分类', on_delete=models.CASCADE, blank=True, null=True)
+    category = models.ForeignKey('Category', verbose_name='分类', on_delete=models.CASCADE, blank=False, null=False)
     tags = models.ManyToManyField('Tag', verbose_name='标签集合', blank=True)
 
     def __str__(self):