diff --git a/addons/api/addon/adapters/application.js b/addons/api/addon/adapters/application.js
index a2f4f3097..d2c91e481 100644
--- a/addons/api/addon/adapters/application.js
+++ b/addons/api/addon/adapters/application.js
@@ -235,7 +235,7 @@ export default class ApplicationAdapter extends RESTAdapter.extend(
    * @return {object}
    */
   transformValidationErrors(payload) {
-    const fieldErrors = get(payload, 'details.fields') || [];
+    const fieldErrors = get(payload, 'details.request_fields') || [];
     // Normalize the primary error message into "base", which is an error
     // that applies to the whole model instance
     const baseError = {
@@ -247,7 +247,7 @@ export default class ApplicationAdapter extends RESTAdapter.extend(
     };
     // Normalize field-specific errors, if any.
     const errors = fieldErrors.map((error) => ({
-      detail: error.message,
+      detail: error.description,
       source: { pointer: `/data/attributes/${error.name}` },
     }));
     // Return a list of JSON API errors rooted under the `errors` key.
diff --git a/addons/api/tests/unit/adapters/application-test.js b/addons/api/tests/unit/adapters/application-test.js
index 9ec67f6f3..633dc7b73 100644
--- a/addons/api/tests/unit/adapters/application-test.js
+++ b/addons/api/tests/unit/adapters/application-test.js
@@ -158,7 +158,7 @@ module('Unit | Adapter | application', function (hooks) {
       code: 'invalid_argument',
       message: 'The request was invalid.',
       details: {
-        fields: [{ name: 'name', message: 'Name is wrong.' }],
+        request_fields: [{ name: 'name', description: 'Name is wrong.' }],
       },
     };
     const handledResponse = adapter.handleResponse(400, {}, payload);
diff --git a/ui/core/tests/acceptance/groups-test.js b/ui/core/tests/acceptance/groups-test.js
index 017d2e669..df2967970 100644
--- a/ui/core/tests/acceptance/groups-test.js
+++ b/ui/core/tests/acceptance/groups-test.js
@@ -84,10 +84,10 @@ module('Acceptance | groups', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
@@ -145,10 +145,10 @@ module('Acceptance | groups', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
diff --git a/ui/core/tests/acceptance/host-catalogs-test.js b/ui/core/tests/acceptance/host-catalogs-test.js
index f88332113..7b4f0d6b2 100644
--- a/ui/core/tests/acceptance/host-catalogs-test.js
+++ b/ui/core/tests/acceptance/host-catalogs-test.js
@@ -179,10 +179,10 @@ module('Acceptance | host catalogs', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
@@ -217,10 +217,10 @@ module('Acceptance | host catalogs', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
diff --git a/ui/core/tests/acceptance/projects-test.js b/ui/core/tests/acceptance/projects-test.js
index 4af813592..f29002157 100644
--- a/ui/core/tests/acceptance/projects-test.js
+++ b/ui/core/tests/acceptance/projects-test.js
@@ -89,10 +89,10 @@ module('Acceptance | projects', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
@@ -150,10 +150,10 @@ module('Acceptance | projects', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
diff --git a/ui/core/tests/acceptance/roles-test.js b/ui/core/tests/acceptance/roles-test.js
index e1b1b3538..edb2d59c3 100644
--- a/ui/core/tests/acceptance/roles-test.js
+++ b/ui/core/tests/acceptance/roles-test.js
@@ -84,10 +84,10 @@ module('Acceptance | roles', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
@@ -145,10 +145,10 @@ module('Acceptance | roles', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
diff --git a/ui/core/tests/acceptance/users-test.js b/ui/core/tests/acceptance/users-test.js
index 26e6b3c55..8ef6afc98 100644
--- a/ui/core/tests/acceptance/users-test.js
+++ b/ui/core/tests/acceptance/users-test.js
@@ -84,10 +84,10 @@ module('Acceptance | users', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },
@@ -145,10 +145,10 @@ module('Acceptance | users', function (hooks) {
           code: 'invalid_argument',
           message: 'The request was invalid.',
           details: {
-            fields: [
+            request_fields: [
               {
                 name: 'name',
-                message: 'Name is required.',
+                description: 'Name is required.',
               },
             ],
           },