diff --git a/core/modules/rest/src/Plugin/views/display/RestExport.php b/core/modules/rest/src/Plugin/views/display/RestExport.php
index 1eba5a9..b2b1700 100644
--- a/core/modules/rest/src/Plugin/views/display/RestExport.php
+++ b/core/modules/rest/src/Plugin/views/display/RestExport.php
@@ -115,6 +115,12 @@ public function initDisplay(ViewExecutable $view, array &$display, array &$optio
     if ($request_content_type != 'html') {
       $this->setContentType($request_content_type);
     }
+    // If the requested content type is 'html' and we only have 1 format option
+    // selected in the view display options, set that as the default content
+    // type.
+    elseif (isset($options['style']['options']['formats']) && count($options['style']['options']['formats']) == 1) {
+      $this->setContentType(reset($options['style']['options']['formats']));
+    }
 
     $this->setMimeType($this->view->getRequest()->getMimeType($this->contentType));
   }