diff --git a/core/integer.rbs b/core/integer.rbs
index b59acd7..5e96f19 100644
--- a/core/integer.rbs
+++ b/core/integer.rbs
@@ -64,4 +64,10 @@ class Integer < Object
   #
   # alias to_s inspect
   # alias self.to_s self.inspect
+
+  def times: () { (Integer i) -> void } -> self
+
+  def upto: (Integer max) { (Integer i) -> void } -> self
+
+  def downto: (Integer min) { (Integer i) -> void } -> self
 end
diff --git a/test/integer.rb b/test/integer.rb
index c8089fa..23d1471 100644
--- a/test/integer.rb
+++ b/test/integer.rb
@@ -56,4 +56,10 @@
 123.clamp 0, 100
 123.clamp 0, 100.0
 
+123.times { |i| i }
+
+123.upto(456) { |i| i }
+
+456.downto(123) { |i| i }
+
 # rubocop:enable all