core/modules/page_cache/src/Tests/PageCacheTest.php | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/core/modules/page_cache/src/Tests/PageCacheTest.php b/core/modules/page_cache/src/Tests/PageCacheTest.php
index 72c89ff..0183b31 100644
--- a/core/modules/page_cache/src/Tests/PageCacheTest.php
+++ b/core/modules/page_cache/src/Tests/PageCacheTest.php
@@ -449,32 +449,32 @@ public function testCacheableResponseResponses() {
     $config->set('cache.page.max_age', 300);
     $config->save();
 
-    // Try to fill the cache.
+    // GET a URL, which would be marked as a cache miss if it were cacheable.
     $this->drupalGet('/system-test/respond-reponse');
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Drupal page cache header not found.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'must-revalidate, no-cache, post-check=0, pre-check=0, private', 'Cache-Control header was sent');
 
-    // Still not cached, uncacheable response.
+    // GET it again, verify it's still not cached.
     $this->drupalGet('/system-test/respond-reponse');
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Drupal page cache header not found.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'must-revalidate, no-cache, post-check=0, pre-check=0, private', 'Cache-Control header was sent');
 
-    // Try to fill the cache.
+    // GET a URL, which would be marked as a cache miss if it were cacheable.
     $this->drupalGet('/system-test/respond-public-response');
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Drupal page cache header not found.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'max-age=60, public', 'Cache-Control header was sent');
 
-    // Still not cached, uncacheable response.
+    // GET it again, verify it's still not cached.
     $this->drupalGet('/system-test/respond-public-response');
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Drupal page cache header not found.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'max-age=60, public', 'Cache-Control header was sent');
 
-    // Try to fill the cache.
+    // GET a URL, which should be marked as a cache miss.
     $this->drupalGet('/system-test/respond-cacheable-reponse');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'max-age=300, public', 'Cache-Control header was sent.');
 
-    // Should be cached now.
+    // GET it again, it should now be a cache hit.
     $this->drupalGet('/system-test/respond-cacheable-reponse');
     $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT', 'Page was cached.');
     $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'max-age=300, public', 'Cache-Control header was sent.');
@@ -484,7 +484,7 @@ public function testCacheableResponseResponses() {
     $this->container->get('module_installer')
       ->uninstall(['page_cache']);
 
-    // Try to fill the cache.
+    // GET a URL that was cached by Page Cache before, it should not be now.
     $this->drupalGet('/respond-cacheable-reponse');
     $this->assertFalse($this->drupalGetHeader('X-Drupal-Cache'), 'Drupal page cache header not found.');
   }