diff --git a/rest_framework/utils/representation.py b/rest_framework/utils/representation.py
index 6f2efee164..7bffa78788 100644
--- a/rest_framework/utils/representation.py
+++ b/rest_framework/utils/representation.py
@@ -23,10 +23,17 @@ def manager_repr(value):
     return repr(value)
 
 
+def queryset_repr(queryset):
+    return "{}".format(queryset.query)
+
+
 def smart_repr(value):
     if isinstance(value, models.Manager):
         return manager_repr(value)
 
+    if isinstance(value, models.QuerySet):
+        value = queryset_repr(value)
+
     if isinstance(value, Promise) and value._delegate_text:
         value = force_str(value)
 
diff --git a/tests/test_model_serializer.py b/tests/test_model_serializer.py
index 7da1b41ae5..55605693ca 100644
--- a/tests/test_model_serializer.py
+++ b/tests/test_model_serializer.py
@@ -559,6 +559,18 @@ class Meta:
         """)
         self.assertEqual(repr(TestSerializer()), expected)
 
+    def test_manual_pk_relation_will_customize_queryset_repr_to_avoid_execute_it(self):
+        queryset = ForeignKeyTargetModel.objects.all()
+
+        class TestSerializer(serializers.Serializer):
+            field = serializers.PrimaryKeyRelatedField(queryset=queryset)
+
+        expected = dedent("""
+            TestSerializer():
+                field = PrimaryKeyRelatedField(queryset='{}')
+        """)
+        self.assertEqual(repr(TestSerializer()), expected.format(queryset.query))
+
     def test_nested_relations(self):
         class TestSerializer(serializers.ModelSerializer):
             class Meta: