diff --git a/tests/annotations/tests.py b/tests/annotations/tests.py
index 4c0ec66665..6cb59c7fe4 100644
--- a/tests/annotations/tests.py
+++ b/tests/annotations/tests.py
@@ -1019,7 +1019,7 @@ class NonAggregateAnnotationTestCase(TestCase):
             .values("publisher")
             .annotate(count=Count("pk"))
             .values("count")
-        )
+        )[:1]
         publisher_books_qs = (
             Publisher.objects.annotate(
                 total_books=Count("book"),
diff --git a/tests/composite_pk/test_filter.py b/tests/composite_pk/test_filter.py
index ed6caf8034..902bd832ff 100644
--- a/tests/composite_pk/test_filter.py
+++ b/tests/composite_pk/test_filter.py
@@ -479,7 +479,7 @@ class CompositePKFilterTests(TestCase):
             Comment.objects.filter(text=Case(When(text="", then="text"), default="pk"))
 
     def test_outer_ref_pk(self):
-        subquery = Subquery(Comment.objects.filter(pk=OuterRef("pk")).values("id"))
+        subquery = Subquery(Comment.objects.filter(pk=OuterRef("pk")).values("id")[:1])
         tests = [
             ("", 5),
             ("__gt", 0),
@@ -527,7 +527,7 @@ class CompositePKFilterTests(TestCase):
         )
 
     def test_outer_ref_not_composite_pk(self):
-        subquery = Comment.objects.filter(pk=OuterRef("id")).values("id")
+        subquery = Comment.objects.filter(pk=OuterRef("id")).values("id")[:1]
         queryset = Comment.objects.filter(id=Subquery(subquery))
 
         msg = "Composite field lookups only work with composite expressions."
diff --git a/tests/expressions/tests.py b/tests/expressions/tests.py
index ac06c212ea..228d73c568 100644
--- a/tests/expressions/tests.py
+++ b/tests/expressions/tests.py
@@ -745,7 +745,7 @@ class BasicExpressionsTests(TestCase):
         subquery_test = Company.objects.filter(pk__in=Subquery(small_companies))
         self.assertCountEqual(subquery_test, [self.foobar_ltd, self.gmbh])
         subquery_test2 = Company.objects.filter(
-            pk=Subquery(small_companies.filter(num_employees=3))
+            pk=Subquery(small_companies.filter(num_employees=3)[:1])
         )
         self.assertCountEqual(subquery_test2, [self.foobar_ltd])