.../tests/src/Functional/EntityResource/EntityResourceTestBase.php  | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
index 97a3941..ab763a8 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
@@ -768,8 +768,7 @@ public function testPost() {
 
     // DX: 400 when unparseable request body.
     $response = $this->request('POST', $url, $request_options);
-    // @todo this is apparently JSON-specific
-//    $this->assertResourceErrorResponse(400, 'Syntax error', $response);
+    $this->assertResourceErrorResponse(400, 'Syntax error', $response);
 
 
     $request_options[RequestOptions::BODY] = $parseable_invalid_request_body;
@@ -1001,8 +1000,7 @@ public function testPatch() {
 
     // DX: 400 when unparseable request body.
     $response = $this->request('PATCH', $url, $request_options);
-    // @todo this is apparently JSON-specific
-//    $this->assertResourceErrorResponse(400, 'Syntax error', $response);
+    $this->assertResourceErrorResponse(400, 'Syntax error', $response);