diff --git a/core/server/api/v2/utils/serializers/output/utils/mapper.js b/core/server/api/v2/utils/serializers/output/utils/mapper.js
index 7f0800e926..3880cc375e 100644
--- a/core/server/api/v2/utils/serializers/output/utils/mapper.js
+++ b/core/server/api/v2/utils/serializers/output/utils/mapper.js
@@ -32,9 +32,9 @@ const mapPost = (model, frame) => {
     if (utils.isContentAPI(frame)) {
         date.forPost(jsonModel);
         members.forPost(jsonModel, frame);
-        extraAttrs.forPost(frame, model, jsonModel);
     }
 
+    extraAttrs.forPost(frame, model, jsonModel);
     clean.post(jsonModel, frame);
 
     if (frame.options && frame.options.withRelated) {
diff --git a/core/test/acceptance/old/admin/pages_spec.js b/core/test/acceptance/old/admin/pages_spec.js
index 3594110d22..604a7c9c77 100644
--- a/core/test/acceptance/old/admin/pages_spec.js
+++ b/core/test/acceptance/old/admin/pages_spec.js
@@ -72,7 +72,10 @@ describe('Pages API', function () {
             .expect(201)
             .then((res) => {
                 res.body.pages.length.should.eql(1);
-                localUtils.API.checkResponse(res.body.pages[0], 'page', null, ['primary_tag', 'primary_author']);
+
+                // @NOTE: we do not return "excerpt" if custom_excerpt or plaintext is empty
+                // @NOTE: we do not return primary_* if null
+                localUtils.API.checkResponse(res.body.pages[0], 'page', null, ['primary_tag', 'primary_author', 'excerpt']);
                 should.exist(res.headers['x-cache-invalidate']);
 
                 return models.Post.findOne({
diff --git a/core/test/acceptance/old/admin/utils.js b/core/test/acceptance/old/admin/utils.js
index de6202ec98..c26435b335 100644
--- a/core/test/acceptance/old/admin/utils.js
+++ b/core/test/acceptance/old/admin/utils.js
@@ -29,8 +29,10 @@ const expectedProperties = {
         .without('visibility')
         .without('locale')
         .without('page')
-        // always returns computed properties: url, comment_id, primary_tag, primary_author
-        .without('author_id').concat('url', 'primary_tag', 'primary_author')
+        // deprecated
+        .without('author_id')
+        // always returns computed properties
+        .concat('url', 'primary_tag', 'primary_author', 'excerpt')
     ,
 
     page: _(schema.posts)
@@ -40,8 +42,10 @@ const expectedProperties = {
         .without('visibility')
         .without('locale')
         .without('page')
-        // always returns computed properties: url, comment_id, primary_tag, primary_author
-        .without('author_id').concat('url', 'primary_tag', 'primary_author')
+        // deprecated
+        .without('author_id')
+        // always returns computed properties
+        .concat('url', 'primary_tag', 'primary_author', 'excerpt')
     ,
 
     user: _(schema.users)