diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2d3e58e..83e8056 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,7 @@ jobs:
     strategy:
       matrix:
         ruby:
+          - '3.4'
           - '3.3'
           - '3.2'
           - '3.1'
diff --git a/features/its.feature b/features/its.feature
index e650b1d..8811872 100644
--- a/features/its.feature
+++ b/features/its.feature
@@ -159,7 +159,7 @@ Feature: attribute of subject
     When I run rspec
     Then the example should fail
     And the output should contain "Failure/Error: its(:foo) { will_not raise_error }"
-    And the output should contain "expected no Exception, got #<NoMethodError: undefined method `foo'"
+    And the output should match /expected no Exception, got #<NoMethodError: undefined method [`']foo'/
 
   Scenario: examples will warn when using non block expectations
     Given a file named "example_spec.rb" with:
diff --git a/script/test_all b/script/test_all
index 0ba5be3..b33690b 100755
--- a/script/test_all
+++ b/script/test_all
@@ -25,6 +25,10 @@ if ruby -e "exit(defined?(RUBY_PLATFORM) && RUBY_PLATFORM == 'java')"; then
   # This is JRUBY which requires this one weird path trick...
   PATH="${PWD}/bin:$PATH" \
   bundle exec cucumber --strict
+elif ruby -e "exit(RUBY_VERSION.to_f >= 3.4)"; then
+  # This is a monkey patch to fix an issue with cucumber using outdated hash syntax, remove when cucumber is updated or ruby 3.4 released
+  sed -i '$i\class Hash; alias :__initialize :initialize; def initialize(*args, **_kw, &block) = __initialize(*args, &block); end' bin/cucumber
+  bin/cucumber --strict
 else
   bundle exec cucumber --strict
 fi;