core/tests/Drupal/KernelTests/Core/Routing/ExceptionHandlingTest.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/tests/Drupal/KernelTests/Core/Routing/ExceptionHandlingTest.php b/core/tests/Drupal/KernelTests/Core/Routing/ExceptionHandlingTest.php
index 8564948..f7e6074 100644
--- a/core/tests/Drupal/KernelTests/Core/Routing/ExceptionHandlingTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Routing/ExceptionHandlingTest.php
@@ -155,7 +155,7 @@ public function testBacktraceEscaping() {
     $kernel = \Drupal::getContainer()->get('http_kernel');
     $response = $kernel->handle($request)->prepare($request);
     $this->assertEqual($response->getStatusCode(), Response::HTTP_INTERNAL_SERVER_ERROR);
-    $this->assertEqual($response->headers->get('Content-type'), 'text/html; charset=UTF-8');
+    $this->assertEqual($response->headers->get('Content-type'), 'text/plain; charset=UTF-8');
 
     // Test both that the backtrace is properly escaped, and that the unescaped
     // string is not output at all.
@@ -178,7 +178,7 @@ public function testExceptionEscaping() {
     $kernel = \Drupal::getContainer()->get('http_kernel');
     $response = $kernel->handle($request)->prepare($request);
     $this->assertEqual($response->getStatusCode(), Response::HTTP_INTERNAL_SERVER_ERROR);
-    $this->assertEqual($response->headers->get('Content-type'), 'text/html; charset=UTF-8');
+    $this->assertEqual($response->headers->get('Content-type'), 'text/plain; charset=UTF-8');
 
     // Test message is properly escaped, and that the unescaped string is not
     // output at all.