diff -Naur a/lib/rspec/core/ruby_project.rb b/lib/rspec/core/ruby_project.rb
--- a/lib/rspec/core/ruby_project.rb	2023-08-11 16:28:19.863503691 +0800
+++ b/lib/rspec/core/ruby_project.rb	2023-08-11 16:29:29.028511667 +0800
@@ -24,7 +24,7 @@
       end
 
       def find_first_parent_containing(dir)
-        ascend_until {|path| File.exists?(File.join(path, dir))}
+        ascend_until {|path| File.exist?(File.join(path, dir))}
       end
 
       def ascend_until