diff -u b/core/modules/system/src/Tests/Module/InstallUninstallTest.php b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
--- b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
+++ b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
@@ -231,7 +231,9 @@
     $this->drupalGet('admin/help/' . $module);
     $this->assertResponse(200, "Help for $module displayed successfully");
     $this->assertText($name . ' module', "'$name module' is on the help page for $module");
-    $this->assertLink('online documentation for the ' . $name . ' module', 0, "Correct online documentation link is in the help page for $module");
+    // @todo Uncomment the next line to assert the online documentation link.
+    // Issue: https://www.drupal.org/node/2493475
+    // $this->assertLink('online documentation for the ' . $name . ' module', 0, "Correct online documentation link is in the help page for $module");
   }
 
   /**
@@ -249,2 +251,3 @@
   }
+
 }