diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ae48ec1..eececa9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        ruby-version: ['3.0', '3.1', '3.2']
+        ruby-version: ['3.0', '3.1', '3.2', '3.3', '3.4']
 
     runs-on: ${{ matrix.os }}
 
diff --git a/test/safe/explain_test.rb b/test/safe/explain_test.rb
index 907683c..b2b5f38 100644
--- a/test/safe/explain_test.rb
+++ b/test/safe/explain_test.rb
@@ -1,10 +1,12 @@
 # typed: strict
 
 require "test_helper"
+require "support/version_helper"
 
 class ExplainTest < Minitest::Test
   include Mocktail::DSL
   extend T::Sig
+  include VersionHelper
 
   class Thing
     extend T::Sig
@@ -41,7 +43,7 @@ def test_explain_stub_returned_nil
 
       The call site:
 
-        #{__FILE__}:25:in `test_explain_stub_returned_nil'
+        #{__FILE__}:27:in #{at_least_ruby_3_4? ? "'ExplainTest#" : "`"}test_explain_stub_returned_nil'
 
       No stubbings were configured on this method.
 
@@ -75,7 +77,7 @@ def test_explain_stub_returned_nil_with_stubbings
 
       The call site:
 
-        #{__FILE__}:56:in `test_explain_stub_returned_nil_with_stubbings'
+        #{__FILE__}:58:in #{at_least_ruby_3_4? ? "'ExplainTest#" : "`"}test_explain_stub_returned_nil_with_stubbings'
 
       Stubbings configured prior to this call but not satisfied by it:
 
diff --git a/test/support/version_helper.rb b/test/support/version_helper.rb
new file mode 100644
index 0000000..770b28d
--- /dev/null
+++ b/test/support/version_helper.rb
@@ -0,0 +1,11 @@
+# typed: false
+
+module VersionHelper
+  def ruby_version
+    Gem::Version.new(RUBY_VERSION)
+  end
+
+  def at_least_ruby_3_4?
+    ruby_version >= "3.4"
+  end
+end
diff --git a/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb b/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb
index e66e374..e6aa4db 100644
--- a/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb
+++ b/test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb
@@ -1,10 +1,12 @@
 # typed: strict
 
 require "test_helper"
+require "support/version_helper"
 
 module Mocktail
   class StringifiesCallTest < Minitest::Test
     extend T::Sig
+    include VersionHelper
 
     sig { params(name: String).void }
     def initialize(name)
@@ -33,21 +35,32 @@ def test_some_calls
       assert_equal "hi([], [1], [[2]], [[3, 4], [5, 6]])", invoke(args: [
         [], [1], [[2]], [[3, 4], [5, 6]]
       ])
-      assert_equal "hi({}, {:a=>1}, {:b=>2, :c=>3}, {:d=>[4, {:e=>5}]})", invoke(args: [
-        {}, {a: 1}, {b: 2, c: 3}, {d: [4, {e: 5}]}
-      ])
+
+      if at_least_ruby_3_4?
+        assert_equal "hi({}, {a: 1}, {b: 2, c: 3}, {d: [4, {e: 5}]})", invoke(args: [
+          {}, {a: 1}, {b: 2, c: 3}, {d: [4, {e: 5}]}
+        ])
+      else
+        assert_equal "hi({}, {:a=>1}, {:b=>2, :c=>3}, {:d=>[4, {:e=>5}]})", invoke(args: [
+          {}, {a: 1}, {b: 2, c: 3}, {d: [4, {e: 5}]}
+        ])
+      end
 
       # Kwargs
       assert_equal "hi(a: 1)", invoke(kwargs: {a: 1})
       assert_equal "hi(c: 2, b: 3)", invoke(kwargs: {c: 2, b: 3})
-      assert_equal "hi(d: {:e=>4}, f: [:g, {:h=>5}])", invoke(kwargs: {d: {e: 4}, f: [:g, {h: 5}]})
+      if at_least_ruby_3_4?
+        assert_equal "hi(d: {e: 4}, f: [:g, {h: 5}])", invoke(kwargs: {d: {e: 4}, f: [:g, {h: 5}]})
+      else
+        assert_equal "hi(d: {:e=>4}, f: [:g, {:h=>5}])", invoke(kwargs: {d: {e: 4}, f: [:g, {h: 5}]})
+      end
 
       # Blocks & Procs
-      assert_equal "hi { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:46 }", invoke {}
-      assert_equal "hi(&lambda[test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:47])", invoke(&lambda {})
+      assert_equal "hi { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:59 }", invoke {}
+      assert_equal "hi(&lambda[test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:60])", invoke(&lambda {})
 
       # Mix & Match
-      assert_equal "hi(:a, 1, b: 2) { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:50 }", invoke(args: [:a, 1], kwargs: {b: 2}) { |c| 3 }
+      assert_equal "hi(:a, 1, b: 2) { Proc at test/unit/verifies_call/raises_verification_error/stringifies_call_test.rb:63 }", invoke(args: [:a, 1], kwargs: {b: 2}) { |c| 3 }
     end
 
     private