diff --git a/api/preprints/serializers.py b/api/preprints/serializers.py
index 6a00e581f4d7..5e74c162d2f8 100644
--- a/api/preprints/serializers.py
+++ b/api/preprints/serializers.py
@@ -144,6 +144,16 @@ class PreprintSerializer(TaxonomizableSerializerMixin, MetricsSerializerMixin, J
         related_view_kwargs={'preprint_id': '<_id>'},
     ))
 
+    affiliated_institutions = RelationshipField(
+        related_view='preprints:preprints-institutions',
+        related_view_kwargs={'preprint_id': '<_id>'},
+        self_view='preprints:preprints-institutions',
+        self_view_kwargs={'preprint_id': '<_id>'},
+        read_only=False,
+        required=False,
+        allow_null=True,
+    )
+
     identifiers = NoneIfWithdrawal(RelationshipField(
         related_view='preprints:identifier-list',
         related_view_kwargs={'preprint_id': '<_id>'},
diff --git a/api_tests/preprints/views/test_preprint_list.py b/api_tests/preprints/views/test_preprint_list.py
index 1935de0270a8..6128ff279dfa 100644
--- a/api_tests/preprints/views/test_preprint_list.py
+++ b/api_tests/preprints/views/test_preprint_list.py
@@ -67,5 +67,6 @@ def test_return_affiliated_institutions(self):
         assert_equal(len(res.json['data']), 1)
         assert_equal(res.status_code, 200)
         assert_equal(res.content_type, 'application/vnd.api+json')
-        relationship_link = res.json['data'][0]['relationships']['affiliated_institutions']['links']['href']
+        print(res.json)
+        relationship_link = res.json['data'][0]['relationships']['affiliated_institutions']['links']['related']['href']
         assert f'/v2/preprints/{self.preprint._id}/institutions/' in relationship_link
diff --git a/api_tests/preprints/views/test_preprint_update.py b/api_tests/preprints/views/test_preprint_update.py
index 2a841b62472f..879af500df46 100644
--- a/api_tests/preprints/views/test_preprint_update.py
+++ b/api_tests/preprints/views/test_preprint_update.py
@@ -61,29 +61,6 @@ def test_update_preprint_permission_denied(self, app, preprint, url):
         res = app.patch_json_api(url, update_doi_payload, auth=read_contrib.auth, expect_errors=True)
         assert res.status_code == 403
 
-    def test_update_original_publication_date_to_none(self, app, preprint, url):
-        write_contrib = AuthUserFactory()
-        preprint.add_contributor(write_contrib, WRITE, save=True)
-        preprint.original_publication_date = '2013-12-11 10:09:08.070605+00:00'
-        preprint.save()
-        update_payload = build_preprint_update_payload(preprint._id, attributes={'original_publication_date': None})
-
-        res = app.patch_json_api(url, update_payload, auth=write_contrib.auth)
-        assert res.status_code == 200
-        preprint.reload()
-        assert preprint.original_publication_date is None
-
-    def test_update_custom_publication_citation_to_none(self, app, preprint, url):
-        write_contrib = AuthUserFactory()
-        preprint.add_contributor(write_contrib, WRITE, save=True)
-        preprint.custom_publication_citation = 'fake citation'
-        preprint.save()
-        update_payload = build_preprint_update_payload(preprint._id, attributes={'custom_publication_citation': None})
-        res = app.patch_json_api(url, update_payload, auth=write_contrib.auth)
-        assert res.status_code == 200
-        preprint.reload()
-        assert preprint.custom_publication_citation is None
-
     @responses.activate
     @mock.patch('osf.models.preprint.update_or_enqueue_on_preprint_updated', mock.Mock())
     def test_update_preprint_permission_write_contrib(self, app, preprint, url):
@@ -264,14 +241,6 @@ def test_update_original_publication_date(self, app, user, preprint, url):
         preprint.reload()
         assert preprint.original_publication_date == date
 
-    def test_update_custom_publication_citation(self, app, user, preprint, url):
-        citation = 'fake citation'
-        update_payload = build_preprint_update_payload(preprint._id, attributes={'custom_publication_citation': citation})
-        res = app.patch_json_api(url, update_payload, auth=user.auth)
-        assert res.status_code == 200
-        preprint.reload()
-        assert preprint.custom_publication_citation == citation
-
     @responses.activate
     @mock.patch('osf.models.preprint.update_or_enqueue_on_preprint_updated', mock.Mock())
     def test_update_article_doi(self, app, user, preprint, url):