1 files changed, 11 insertions, 8 deletions
diff --git a/spec/ruby/library/matrix/row_size_spec.rb b/spec/ruby/library/matrix/row_size_spec.rb
index eb3aef2e2f..fca5a846ab 100644
--- a/spec/ruby/library/matrix/row_size_spec.rb
+++ b/spec/ruby/library/matrix/row_size_spec.rb
@@ -1,13 +1,16 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#row_size" do
-  it "returns the number rows" do
-    Matrix[ [1,2], [3, 4], [5, 6] ].row_size.should == 3
-  end
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  it "returns the number rows even for some empty matrices" do
-    Matrix[ [], [], [] ].row_size.should == 3
-  end
+  describe "Matrix#row_size" do
+    it "returns the number rows" do
+      Matrix[ [1,2], [3, 4], [5, 6] ].row_size.should == 3
+    end
 
+    it "returns the number rows even for some empty matrices" do
+      Matrix[ [], [], [] ].row_size.should == 3
+    end
+
+  end
 end