diff --git a/AppNet/AppDelegate.swift b/AppNet/AppDelegate.swift
index 552122ab..849e5071 100644
--- a/AppNet/AppDelegate.swift
+++ b/AppNet/AppDelegate.swift
@@ -15,11 +15,11 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     }
 
     func applicationDidEnterBackground(application: UIApplication) {
-        self.dataStack.persistWithCompletion(nil)
+        dataStack.persistWithCompletion(nil)
     }
 
     func applicationWillTerminate(application: UIApplication) {
-        self.dataStack.persistWithCompletion(nil)
+        dataStack.persistWithCompletion(nil)
     }
 }
 
diff --git a/AppNet/ViewController.swift b/AppNet/ViewController.swift
index 398ba342..1394158d 100644
--- a/AppNet/ViewController.swift
+++ b/AppNet/ViewController.swift
@@ -73,8 +73,8 @@ extension ViewController {
     }
 
     override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
-        let cell = self.tableView.dequeueReusableCellWithIdentifier(CellIdentifier)
-        let data = self.items[indexPath.row]
+        let cell = tableView.dequeueReusableCellWithIdentifier(CellIdentifier)
+        let data = items[indexPath.row]
         cell?.textLabel?.text = data.text
 
         // Workaround: The proper value of `numberOfLines` should be 0