diff --git a/tests/custom_managers/tests.py b/tests/custom_managers/tests.py
index f9a9f33..2761b92 100644
--- a/tests/custom_managers/tests.py
+++ b/tests/custom_managers/tests.py
@@ -189,3 +189,51 @@ class CustomManagerTests(TestCase):
             ],
             lambda c: c.first_name
         )
+
+    def test_related_manager_fk_removal(self):
+        self.p1.favorite_book = self.b1
+        self.p1.save()
+        self.p2.favorite_book = self.b1
+        self.p2.save()
+
+        # This should not remove anything because p1 is not considered boring.
+        self.b1.favorite_books(manager='boring_people').remove(self.p1)
+        self.assertQuerysetEqual(
+            self.b1.favorite_books(manager='boring_people').all(), [
+                "Droopy",
+            ],
+            lambda c: c.first_name
+        )
+        self.assertQuerysetEqual(
+            self.b1.favorite_books(manager='fun_people').all(), [
+                "Bugs",
+            ],
+            lambda c: c.first_name
+        )
+
+        # This should only remove fun people, not boring peopel.
+        self.b1.favorite_books(manager='fun_people').clear()
+        self.assertQuerysetEqual(
+            self.b1.favorite_books(manager='boring_people').all(), [
+                "Droopy",
+            ],
+            lambda c: c.first_name
+        )
+        self.assertQuerysetEqual(
+            self.b1.favorite_books(manager='fun_people').all(), [
+            ],
+            lambda c: c.first_name
+        )
+
+        # This should succeed because p2 IS considered boring.
+        self.b1.favorite_books(manager='boring_people').remove(self.p2)
+        self.assertQuerysetEqual(
+            self.b1.favorite_books(manager='boring_people').all(), [
+            ],
+            lambda c: c.first_name
+        )
+        self.assertQuerysetEqual(
+            self.b1.favorite_books(manager='fun_people').all(), [
+            ],
+            lambda c: c.first_name
+        )