diff --git a/core/string/reverse_spec.rb b/core/string/reverse_spec.rb
index ac38d9bead..b45ff2cf6f 100644
--- a/core/string/reverse_spec.rb
+++ b/core/string/reverse_spec.rb
@@ -18,7 +18,7 @@
     end
   end
 
-  ruby_version_is ''...'3.0.0' do
+  ruby_version_is ''...'3.0' do
     it "returns subclass instances when called on a subclass" do
       StringSpecs::MyString.new("stressed").reverse.should be_an_instance_of(StringSpecs::MyString)
       StringSpecs::MyString.new("m").reverse.should be_an_instance_of(StringSpecs::MyString)
diff --git a/core/string/scrub_spec.rb b/core/string/scrub_spec.rb
index df6d42e6e1..4da44a7992 100644
--- a/core/string/scrub_spec.rb
+++ b/core/string/scrub_spec.rb
@@ -34,7 +34,7 @@
     end
   end
 
-  ruby_version_is ''...'3.0.0' do
+  ruby_version_is ''...'3.0' do
     it "returns subclass instances when called on a subclass" do
       StringSpecs::MyString.new("foo").scrub.should be_an_instance_of(StringSpecs::MyString)
     end
diff --git a/core/string/shared/partition.rb b/core/string/shared/partition.rb
index 5785443d6f..7dc3d9cc0b 100644
--- a/core/string/shared/partition.rb
+++ b/core/string/shared/partition.rb
@@ -18,7 +18,7 @@
     end
   end
 
-  ruby_version_is ''...'3.0.0' do
+  ruby_version_is ''...'3.0' do
     it "returns subclass instances when called on a subclass" do
       StringSpecs::MyString.new("hello").send(@method, StringSpecs::MyString.new("l")).each do |item|
         item.should be_an_instance_of(StringSpecs::MyString)
diff --git a/core/string/shared/strip.rb b/core/string/shared/strip.rb
index caf6275fae..9c232b4694 100644
--- a/core/string/shared/strip.rb
+++ b/core/string/shared/strip.rb
@@ -10,7 +10,7 @@
     end
   end
 
-  ruby_version_is ''...'3.0.0' do
+  ruby_version_is ''...'3.0' do
     it "returns subclass instances when called on a subclass" do
       StringSpecs::MyString.new(" hello ").send(@method).should be_an_instance_of(StringSpecs::MyString)
       StringSpecs::MyString.new(" ").send(@method).should be_an_instance_of(StringSpecs::MyString)