diff --git a/core/modules/dblog/src/Tests/DbLogTest.php b/core/modules/dblog/src/Tests/DbLogTest.php
index 7db1b16..a73ed65 100644
--- a/core/modules/dblog/src/Tests/DbLogTest.php
+++ b/core/modules/dblog/src/Tests/DbLogTest.php
@@ -698,4 +698,37 @@ protected function assertLogMessage($log_message, $message) {
     // string in xpath() to query the Document Object Model (DOM).
     $this->assertLink(html_entity_decode($message_text), 0, $message);
   }
+
+  /**
+   * Tests if report detail view for non-existing user.
+   *
+   * Logs in the admin user, creates a database log event as ephemeral user
+   * and tests the if detail page is not blank if this user does not exists
+   * anymore.
+   */
+  public function testEphemeralUser() {
+    // Create ephemeral user.
+    $tempuser = $this->drupalCreateUser();
+    $tempuser_uid = $tempuser->id();
+
+    // Login as a user with access right to dblog.
+    $this->drupalLogin($this->adminUser);
+
+    // Generate entry as a ephemeral user.
+    $this->generateLogEntries(1, array('user' => $tempuser, 'uid' => $tempuser_uid));
+    $wid = db_query('SELECT MAX(wid) FROM {watchdog}')->fetchField();
+
+    // Check if dblog event detail view contain correct message.
+    $this->drupalGet('admin/reports/dblog/event/' . $wid);
+    $this->assertText('Dblog test log message', 'DBLog event node was displayed');
+
+    // Delete ephemeral user.
+    user_delete($tempuser->id());
+    $this->drupalGet('user/' . $tempuser_uid);
+    $this->assertResponse(404);
+
+    // Check if dblog event detail view contain correct message.
+    $this->drupalGet('admin/reports/dblog/event/' . $wid);
+    $this->assertText('Dblog test log message', 'DBLog event node was displayed');
+  }
 }