1 files changed, 22 insertions, 10 deletions
diff --git a/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb b/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb
index 3af0186f27..798a2e2cda 100644
--- a/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb
+++ b/spec/ruby/core/objectspace/weakkeymap/getkey_spec.rb
@@ -1,14 +1,26 @@
 require_relative '../../../spec_helper'
 
-ruby_version_is "3.3" do
-  describe "ObjectSpace::WeakKeyMap#getkey" do
-    it "returns the existing equal key" do
-      map = ObjectSpace::WeakKeyMap.new
-      key1, key2 = %w[a a].map(&:upcase)
-
-      map[key1] = true
-      map.getkey(key2).should equal(key1)
-      map.getkey("X").should == nil
-    end
+describe "ObjectSpace::WeakKeyMap#getkey" do
+  it "returns the existing equal key" do
+    map = ObjectSpace::WeakKeyMap.new
+    key1, key2 = %w[a a].map(&:upcase)
+
+    map[key1] = true
+    map.getkey(key2).should.equal?(key1)
+    map.getkey("X").should == nil
+
+    key1.should == "A" # keep the key alive until here to keep the map entry
+    key2.should == "A" # keep the key alive until here to keep the map entry
+  end
+
+  it "returns nil when a key cannot be garbage collected" do
+    map = ObjectSpace::WeakKeyMap.new
+
+    map.getkey(1).should == nil
+    map.getkey(1.0).should == nil
+    map.getkey(:a).should == nil
+    map.getkey(true).should == nil
+    map.getkey(false).should == nil
+    map.getkey(nil).should == nil
   end
 end