.../EntityResource/EntityResourceTestBase.php      | 27 ++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
index 53796c8..19271f0 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
@@ -298,6 +298,7 @@ protected function getExpectedCacheContexts() {
   public function testGet() {
     $this->initAuthentication();
     $has_canonical_url = $this->entity->hasLinkTemplate('canonical');
+    $canonical_url_is_admin_route = strpos($this->entity->getEntityType()->getLinkTemplate('canonical'), '/admin/') === 0;
 
     // The URL and Guzzle request options that will be used in this test. The
     // request options will be modified/expanded throughout this test:
@@ -386,6 +387,16 @@ public function testGet() {
     // 200 for well-formed HEAD request.
     $response = $this->request('HEAD', $url, $request_options);
     $this->assertResourceResponse(200, '', $response);
+    // Dynamic Page Cache does not work for admin routes.
+    // @see \Drupal\dynamic_page_cache\PageCache\ResponsePolicy\DenyAdminRoutes
+    if (!$canonical_url_is_admin_route) {
+      $this->assertTrue($response->hasHeader('X-Drupal-Dynamic-Cache'));
+      $this->assertSame(['MISS'], $response->getHeader('X-Drupal-Dynamic-Cache'));
+    }
+    else {
+      $this->assertFalse($response->hasHeader('X-Drupal-Dynamic-Cache'));
+    }
+    // Page Cache does not work for authenticated users.
     if (!$this->account) {
       $this->assertSame(['MISS'], $response->getHeader('X-Drupal-Cache'));
     }
@@ -395,13 +406,25 @@ public function testGet() {
     $head_headers = $response->getHeaders();
 
     // 200 for well-formed GET request. Page Cache hit because of HEAD request.
+    // Same for Dynamic Page Cache hit.
     $response = $this->request('GET', $url, $request_options);
     $this->assertResourceResponse(200, FALSE, $response);
-    if (!static::$auth) {
-      $this->assertSame(['HIT'], $response->getHeader('X-Drupal-Cache'));
+    // Dynamic Page Cache does not work for admin routes.
+    // @see \Drupal\dynamic_page_cache\PageCache\ResponsePolicy\DenyAdminRoutes
+    if (!$canonical_url_is_admin_route) {
+      $this->assertTrue($response->hasHeader('X-Drupal-Dynamic-Cache'));
+      if (!static::$auth) {
+        $this->assertSame(['HIT'], $response->getHeader('X-Drupal-Cache'));
+        $this->assertSame(['MISS'], $response->getHeader('X-Drupal-Dynamic-Cache'));
+      }
+      else {
+        $this->assertFalse($response->hasHeader('X-Drupal-Cache'));
+        $this->assertSame(['HIT'], $response->getHeader('X-Drupal-Dynamic-Cache'));
+      }
     }
     else {
       $this->assertFalse($response->hasHeader('X-Drupal-Cache'));
+      $this->assertFalse($response->hasHeader('X-Drupal-Dynamic-Cache'));
     }
     $cache_tags_header_value = $response->getHeader('X-Drupal-Cache-Tags')[0];
     $this->assertEquals($this->getExpectedCacheTags(), empty($cache_tags_header_value) ? [] : explode(' ', $cache_tags_header_value));