diff --git a/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php b/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
index 1dc8dc2c5f65..e11b98a10f65 100644
--- a/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
+++ b/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
@@ -309,13 +309,13 @@ public function makeDisposition($disposition, $filename, $filenameFallback = '')
      */
     protected function computeCacheControlValue()
     {
-        if (!$this->cacheControl && !$this->has('ETag') && !$this->has('Last-Modified') && !$this->has('Expires')) {
-            return 'no-cache, private';
-        }
-
         if (!$this->cacheControl) {
+            if ($this->has('Last-Modified') || $this->has('Expires')) {
+                return 'private, must-revalidate'; // allows for heuristic expiration (RFC 7234 Section 4.2.2) in the case of "Last-Modified"
+            }
+
             // conservative by default
-            return 'private, must-revalidate';
+            return 'no-cache, private';
         }
 
         $header = $this->getCacheControlHeader();
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
index d85f6e112fd1..4e3a6c82b551 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
@@ -51,9 +51,9 @@ public function testCacheControlHeader()
         $this->assertTrue($bag->hasCacheControlDirective('public'));
 
         $bag = new ResponseHeaderBag(['ETag' => 'abcde']);
-        $this->assertEquals('private, must-revalidate', $bag->get('Cache-Control'));
+        $this->assertEquals('no-cache, private', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('private'));
-        $this->assertTrue($bag->hasCacheControlDirective('must-revalidate'));
+        $this->assertTrue($bag->hasCacheControlDirective('no-cache'));
         $this->assertFalse($bag->hasCacheControlDirective('max-age'));
 
         $bag = new ResponseHeaderBag(['Expires' => 'Wed, 16 Feb 2011 14:17:43 GMT']);
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php b/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
index 3bdf0f519989..aee689e1cea3 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
@@ -110,8 +110,6 @@ public function update(Response $response)
         $response->headers->set('Age', $this->age);
 
         if ($this->isNotCacheableResponseEmbedded) {
-            $response->setExpires($response->getDate());
-
             if ($this->flagDirectives['no-store']) {
                 $response->headers->set('Cache-Control', 'no-cache, no-store, must-revalidate');
             } else {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
index 93d92eb11e7e..a4e30444a539 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
@@ -1242,7 +1242,6 @@ public function testEsiCacheForceValidation()
         $this->request('GET', '/', [], [], true);
         $this->assertEquals('Hello World! My name is Bobby.', $this->response->getContent());
         $this->assertNull($this->response->getTtl());
-        $this->assertTrue($this->response->mustRevalidate());
         $this->assertTrue($this->response->headers->hasCacheControlDirective('private'));
         $this->assertTrue($this->response->headers->hasCacheControlDirective('no-cache'));
     }
@@ -1273,7 +1272,6 @@ public function testEsiCacheForceValidationForHeadRequests()
         // This can neither be cached nor revalidated, so it should be private/no cache
         $this->assertEmpty($this->response->getContent());
         $this->assertNull($this->response->getTtl());
-        $this->assertTrue($this->response->mustRevalidate());
         $this->assertTrue($this->response->headers->hasCacheControlDirective('private'));
         $this->assertTrue($this->response->headers->hasCacheControlDirective('no-cache'));
     }