1 files changed, 4 insertions, 6 deletions
diff --git a/spec/ruby/library/matrix/det_spec.rb b/spec/ruby/library/matrix/det_spec.rb
index 7d3d547735..fc4b1c252a 100644
--- a/spec/ruby/library/matrix/det_spec.rb
+++ b/spec/ruby/library/matrix/det_spec.rb
@@ -1,10 +1,8 @@
 require_relative '../../spec_helper'
+require 'matrix'
 
-ruby_version_is ""..."3.1" do
-  require_relative 'shared/determinant'
-  require 'matrix'
-
-  describe "Matrix#det" do
-    it_behaves_like :determinant, :det
+describe "Matrix#det" do
+  it "is an alias of Matrix#determinant" do
+    Matrix.instance_method(:det).should == Matrix.instance_method(:determinant)
   end
 end