diff --git a/readthedocs/api/v3/serializers.py b/readthedocs/api/v3/serializers.py
index be78b46b8f0..bd76b4e337f 100644
--- a/readthedocs/api/v3/serializers.py
+++ b/readthedocs/api/v3/serializers.py
@@ -794,6 +794,7 @@ class Meta:
             "urls",
             "tags",
             "privacy_level",
+            "readthedocs_yaml_path",
             "external_builds_privacy_level",
             "versioning_scheme",
             # Kept for backwards compatibility,
diff --git a/readthedocs/api/v3/tests/responses/projects-detail.json b/readthedocs/api/v3/tests/responses/projects-detail.json
index bc00dc35ad2..fdb34930988 100644
--- a/readthedocs/api/v3/tests/responses/projects-detail.json
+++ b/readthedocs/api/v3/tests/responses/projects-detail.json
@@ -73,6 +73,7 @@
         "test"
     ],
     "translation_of": null,
+    "readthedocs_yaml_path": null,
     "urls": {
         "builds": "https://readthedocs.org/projects/project/builds/",
         "documentation": "http://project.readthedocs.io/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/projects-list.json b/readthedocs/api/v3/tests/responses/projects-list.json
index 38b8eb0e7eb..cffb5c7c0ff 100644
--- a/readthedocs/api/v3/tests/responses/projects-list.json
+++ b/readthedocs/api/v3/tests/responses/projects-list.json
@@ -26,6 +26,7 @@
             "default_branch": "master",
             "subproject_of": null,
             "translation_of": null,
+            "readthedocs_yaml_path": null,
             "urls": {
                 "builds": "https://readthedocs.org/projects/project/builds/",
                 "documentation": "http://project.readthedocs.io/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/projects-list_POST.json b/readthedocs/api/v3/tests/responses/projects-list_POST.json
index 2eec41c057d..1b8ab572497 100644
--- a/readthedocs/api/v3/tests/responses/projects-list_POST.json
+++ b/readthedocs/api/v3/tests/responses/projects-list_POST.json
@@ -34,6 +34,7 @@
     "subproject_of": null,
     "tags": ["template tag", "test tag"],
     "translation_of": null,
+    "readthedocs_yaml_path": null,
     "urls": {
         "builds": "https://readthedocs.org/projects/test-project/builds/",
         "documentation": "http://test-project.readthedocs.io/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/projects-subprojects-detail.json b/readthedocs/api/v3/tests/responses/projects-subprojects-detail.json
index 09140179130..55773e48429 100644
--- a/readthedocs/api/v3/tests/responses/projects-subprojects-detail.json
+++ b/readthedocs/api/v3/tests/responses/projects-subprojects-detail.json
@@ -39,6 +39,7 @@
         "slug": "subproject",
         "tags": [],
         "translation_of": null,
+        "readthedocs_yaml_path": null,
         "urls": {
             "builds": "https://readthedocs.org/projects/subproject/builds/",
             "documentation": "http://project.readthedocs.io/projects/subproject/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/projects-subprojects-list.json b/readthedocs/api/v3/tests/responses/projects-subprojects-list.json
index 3ba539a3881..f7c00933547 100644
--- a/readthedocs/api/v3/tests/responses/projects-subprojects-list.json
+++ b/readthedocs/api/v3/tests/responses/projects-subprojects-list.json
@@ -44,6 +44,7 @@
                 "slug": "subproject",
                 "tags": [],
                 "translation_of": null,
+                "readthedocs_yaml_path": null,
                 "urls": {
                     "builds": "https://readthedocs.org/projects/subproject/builds/",
                     "documentation": "http://project.readthedocs.io/projects/subproject/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/projects-superproject.json b/readthedocs/api/v3/tests/responses/projects-superproject.json
index 507f19bcff5..58a465e049c 100644
--- a/readthedocs/api/v3/tests/responses/projects-superproject.json
+++ b/readthedocs/api/v3/tests/responses/projects-superproject.json
@@ -38,6 +38,7 @@
         "test"
     ],
     "translation_of": null,
+    "readthedocs_yaml_path": null,
     "urls": {
         "builds": "https://readthedocs.org/projects/project/builds/",
         "documentation": "http://project.readthedocs.io/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/projects-versions-builds-list_POST.json b/readthedocs/api/v3/tests/responses/projects-versions-builds-list_POST.json
index 47f2be8ae2e..fbda2e3a255 100644
--- a/readthedocs/api/v3/tests/responses/projects-versions-builds-list_POST.json
+++ b/readthedocs/api/v3/tests/responses/projects-versions-builds-list_POST.json
@@ -65,6 +65,7 @@
             "test"
         ],
         "translation_of": null,
+        "readthedocs_yaml_path": null,
         "urls": {
             "builds": "https://readthedocs.org/projects/project/builds/",
             "documentation": "http://project.readthedocs.io/en/latest/",
diff --git a/readthedocs/api/v3/tests/responses/remoterepositories-list.json b/readthedocs/api/v3/tests/responses/remoterepositories-list.json
index 8733374a09e..eebe17576b4 100644
--- a/readthedocs/api/v3/tests/responses/remoterepositories-list.json
+++ b/readthedocs/api/v3/tests/responses/remoterepositories-list.json
@@ -43,6 +43,7 @@
         "subproject_of": null,
         "tags": ["project", "tag", "test"],
         "translation_of": null,
+        "readthedocs_yaml_path": null,
         "urls": {
           "builds": "https://readthedocs.org/projects/project/builds/",
           "documentation": "http://project.readthedocs.io/en/latest/",