diff --git a/core/env/each_key_spec.rb b/core/env/each_key_spec.rb
index 77a3bb7d8..abaaf181f 100644
--- a/core/env/each_key_spec.rb
+++ b/core/env/each_key_spec.rb
@@ -34,7 +34,7 @@
 
   # https://bugs.ruby-lang.org/issues/20958
   platform_is :windows do
-    ruby_version_is ""..."4.1" do
+    ruby_version_is ""..."3.4.11" do
       it "returns keys in the locale encoding" do
         ENV.each_key do |key|
           key.encoding.should == Encoding.find('locale')
@@ -42,7 +42,7 @@
       end
     end
 
-    ruby_version_is "4.1" do
+    ruby_version_is "3.4.11" do
       it "returns the keys in UTF-8" do
         ENV.each_key do |key|
           key.encoding.should == Encoding::UTF_8
diff --git a/core/env/keys_spec.rb b/core/env/keys_spec.rb
index 0efe841cc..e2de0b739 100644
--- a/core/env/keys_spec.rb
+++ b/core/env/keys_spec.rb
@@ -16,7 +16,7 @@
 
   # https://bugs.ruby-lang.org/issues/20958
   platform_is :windows do
-    ruby_version_is ""..."4.1" do
+    ruby_version_is ""..."3.4.11" do
       it "returns the keys in the locale encoding" do
         ENV.keys.each do |key|
           key.encoding.should == Encoding.find('locale')
@@ -24,7 +24,7 @@
       end
     end
 
-    ruby_version_is "4.1" do
+    ruby_version_is "3.4.11" do
       it "returns the keys in UTF-8" do
         ENV.keys.each do |key|
           key.encoding.should == Encoding::UTF_8