diff --git a/packages/core/content-type-builder/admin/src/components/FormModal/contentType/createContentTypeSchema.js b/packages/core/content-type-builder/admin/src/components/FormModal/contentType/createContentTypeSchema.js
index c30a7b7ef6..b31c169cdc 100644
--- a/packages/core/content-type-builder/admin/src/components/FormModal/contentType/createContentTypeSchema.js
+++ b/packages/core/content-type-builder/admin/src/components/FormModal/contentType/createContentTypeSchema.js
@@ -62,6 +62,17 @@ const createContentTypeSchema = (
           return context.parent.singularName !== value;
         },
       })
+      .test({
+        name: 'nameNotAllowed',
+        message: getTrad('error.contentTypeName.reserved-name'),
+        test(value) {
+          if (!value) {
+            return false;
+          }
+
+          return !reservedNames.includes(toLower(trim(value)));
+        },
+      })
       .required(errorsTrads.required),
     singularName: yup
       .string()
@@ -87,6 +98,17 @@ const createContentTypeSchema = (
           return context.parent.pluralName !== value;
         },
       })
+      .test({
+        name: 'nameNotAllowed',
+        message: getTrad('error.contentTypeName.reserved-name'),
+        test(value) {
+          if (!value) {
+            return false;
+          }
+
+          return !reservedNames.includes(toLower(trim(value)));
+        },
+      })
       .required(errorsTrads.required),
     draftAndPublish: yup.boolean(),
     kind: yup.string().oneOf(['singleType', 'collectionType']),