diff --git a/src/ameba/rule/performance/count.cr b/src/ameba/rule/performance/count.cr
index 5e7c2f24..373525e3 100644
--- a/src/ameba/rule/performance/count.cr
+++ b/src/ameba/rule/performance/count.cr
@@ -8,6 +8,7 @@ module Ameba::Rule::Performance
   # [1, 2, 3].select { |e| e > 2 }.size
   # [1, 2, 3].reject { |e| e < 2 }.size
   # [1, 2, 3].select(&.< 2).size
+  # [0, 1, 2].select(&.zero?).size
   # [0, 1, 2].reject(&.zero?).size
   # ```
   #
@@ -15,9 +16,10 @@ module Ameba::Rule::Performance
   #
   # ```
   # [1, 2, 3].count { |e| e > 2 }
-  # [1, 2, 3].count { |e| e < 2 }
+  # [1, 2, 3].count { |e| e > 2 }
   # [1, 2, 3].count(&.< 2)
   # [0, 1, 2].count(&.zero?)
+  # [0, 1, 2].count(&.!= 0)
   # ```
   #
   struct Count < Base