Add unused app with manytomany field

tests/test_project/app_add_manytomany_field/migrations/0001_initial.py

@@ -0,0 +1,41 @@
+# Generated by Django 2.2 on 2019-09-20 20:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name="A",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                )
+            ],
+        ),
+        migrations.CreateModel(
+            name="B",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                )
+            ],
+        ),
+    ]

tests/test_project/app_add_manytomany_field/migrations/0002_b_many_to_many.py

@@ -0,0 +1,16 @@
+# Generated by Django 2.2 on 2019-09-20 20:02
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("app_add_manytomany_field", "0001_initial")]
+
+    operations = [
+        migrations.AddField(
+            model_name="b",
+            name="many_to_many",
+            field=models.ManyToManyField(to="app_add_manytomany_field.A"),
+        )
+    ]