diff --git a/test/ruby/test_vm_dump.rb b/test/ruby/test_vm_dump.rb
index 7c31821d52..86d89adb96 100644
--- a/test/ruby/test_vm_dump.rb
+++ b/test/ruby/test_vm_dump.rb
@@ -7,7 +7,7 @@ class TestVMDump < Test::Unit::TestCase
   def assert_darwin_vm_dump_works(args, timeout=nil)
     pend "macOS 15 beta is not working with this assertion" if /darwin/ =~ RUBY_PLATFORM && /15/ =~ `sw_vers -productVersion`
 
-    assert_in_out_err(args, "", [], /^\[IMPORTANT\]/, timeout: timeout || 1800)
+    assert_in_out_err(args, "", [], /^\[IMPORTANT\]/, timeout: timeout || 300)
   end
 
   def test_darwin_invalid_call