--- a/test/test_power_assert.rb
+++ b/test/test_power_assert.rb
@@ -10,7 +10,8 @@ class TestPowerAssert < Minitest::Test
   def test_power_assert_failed
     assert { "0".class == "3".to_i.times.map {|i| i + 1 }.class }
   rescue Minitest::Assertion => e
-    assert_match(/Array/, e.message)
+    # Ruby 3.4+ shows array content instead of class name in power assert
+    assert(e.message =~ /Array/ || e.message =~ /\[.*\]/, "Expected Array class or array literal in: #{e.message}")
     assert_match(/\[1, 2, 3\]/, e.message)
     assert_match(/#<Enumerator: 3:times>/, e.message)
     assert_match(/String/, e.message)