[3.1.x] Reverted "Fixed #30300 -- Allowed migrations to be loaded from directories without __init__.py file."

This reverts commit 3cd3bebe8921e14b911b36b2a1cbceef8fb6294e.
Backport of ff55adbd0da6618abaf265d16196bf54f81aa77a from master

1 files changed, 5 insertions, 6 deletions

diff --git a/tests/migrations/test_loader.py b/tests/migrations/test_loader.py
index ce2f209188..27a052ddac 100644
--- a/tests/migrations/test_loader.py
+++ b/tests/migrations/test_loader.py
@@ -506,12 +506,11 @@ class LoaderTests(TestCase):
         MIGRATION_MODULES={'migrations': 'migrations.test_migrations_namespace_package'},
     )
     def test_loading_namespace_package(self):
-        """Migration directories without an __init__.py file are loaded."""
-        migration_loader = MigrationLoader(connection)
-        self.assertEqual(
-            migration_loader.graph.forwards_plan(('migrations', '0001_initial')),
-            [('migrations', '0001_initial')],
-        )
+        """Migration directories without an __init__.py file are ignored."""
+        loader = MigrationLoader(connection)
+        loader.load_disk()
+        migrations = [name for app, name in loader.disk_migrations if app == 'migrations']
+        self.assertEqual(migrations, [])
 
 
 class PycLoaderTests(MigrationTestBase):