diff --git a/Rx.playground/Pages/Filtering_and_Conditional_Operators.xcplaygroundpage/Contents.swift b/Rx.playground/Pages/Filtering_and_Conditional_Operators.xcplaygroundpage/Contents.swift
index 064b5028..c885603a 100644
--- a/Rx.playground/Pages/Filtering_and_Conditional_Operators.xcplaygroundpage/Contents.swift
+++ b/Rx.playground/Pages/Filtering_and_Conditional_Operators.xcplaygroundpage/Contents.swift
@@ -73,6 +73,16 @@ example("single") {
 example("single with conditions") {
     let disposeBag = DisposeBag()
     
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .single { $0 == "🐸" }
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    Observable.of("🐱", "🐰", "🐶", "🐱", "🐰", "🐶")
+        .single { $0 == "🐰" }
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
     Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
         .single { $0 == "🔵" }
         .subscribe { print($0) }