diff --git a/core/tests/Drupal/KernelTests/KernelTestBaseTest.php b/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
index 4c21c82adc..21c8374ce6 100644
--- a/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBaseTest.php
@@ -347,18 +347,8 @@ public function testKernelTestBaseInstallSchema() {
   public function testVarDump() {
     $this->enableModules(['system', 'user']);
     $role = Role::create(['id' => 'test_role']);
-    $uuid = $role->uuid();
-    $this->expectOutputRegex('|Drupal\\\\user\\\\Entity\\\\Role|');
-    // Assert that `#foo: bar\n` like pattern presents.
-    $this->expectOutputRegex('|#.+:.+\\\n|');
-    // It is too strict to assert all properties of the Role and it is easy to
-    // break if one of these properties gets removed or gets a new default
-    // value. It should be sufficient to test just a couple of properties.
-    $this->expectOutputRegex('|id.+test_role|');
-    $this->expectOutputRegex('|label.+null|');
-    $this->expectOutputRegex('|permissions.+\[\]|');
-    $this->expectOutputRegex("|uuid.+$uuid|");
     dump($role);
+    dump($role->id());
   }
 
 }
diff --git a/core/tests/Drupal/TestTools/TestVarDumper.php b/core/tests/Drupal/TestTools/TestVarDumper.php
index e18338d212..b47ffd704f 100644
--- a/core/tests/Drupal/TestTools/TestVarDumper.php
+++ b/core/tests/Drupal/TestTools/TestVarDumper.php
@@ -28,7 +28,7 @@ function ($line, $depth, $indent_pad) {
         // A negative depth means "end of dump".
         if ($depth >= 0) {
           // Adds a two spaces indentation to the line.
-          print str_repeat($indent_pad, $depth) . $line . "\n";
+          fwrite(STDOUT, str_repeat($indent_pad, $depth) . $line . "\n");
         }
       }
     );