diff --git a/core/enumerable/compact_spec.rb b/core/enumerable/compact_spec.rb
new file mode 100644
index 0000000000..86e95dce08
--- /dev/null
+++ b/core/enumerable/compact_spec.rb
@@ -0,0 +1,11 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+ruby_version_is '3.1' do
+  describe "Enumerable#compact" do
+    it 'returns array without nil elements' do
+      arr = EnumerableSpecs::Numerous.new(nil, 1, 2, nil, true)
+      arr.compact.should == [1, 2, true]
+    end
+  end
+end
diff --git a/core/enumerator/lazy/lazy_spec.rb b/core/enumerator/lazy/lazy_spec.rb
index cde9b31066..683dfb81d7 100644
--- a/core/enumerator/lazy/lazy_spec.rb
+++ b/core/enumerator/lazy/lazy_spec.rb
@@ -16,6 +16,10 @@
     ]
     lazy_methods += [:chunk_while, :uniq]
 
+    ruby_version_is '3.1' do
+      lazy_methods += [:compact]
+    end
+
     Enumerator::Lazy.instance_methods(false).should include(*lazy_methods)
   end
 end
@@ -26,3 +30,13 @@
     lazy.lazy.should equal(lazy)
   end
 end
+
+ruby_version_is '3.1' do
+  describe "Enumerator::Lazy#compact" do
+    it 'returns array without nil elements' do
+      arr = [1, nil, 3, false, 5].to_enum.lazy.compact
+      arr.should be_an_instance_of(Enumerator::Lazy)
+      arr.force.should == [1, 3, false, 5]
+    end
+  end
+end