1 files changed, 22 insertions, 19 deletions
diff --git a/spec/ruby/library/matrix/orthogonal_spec.rb b/spec/ruby/library/matrix/orthogonal_spec.rb
index 26afe89ff0..eb06305040 100644
--- a/spec/ruby/library/matrix/orthogonal_spec.rb
+++ b/spec/ruby/library/matrix/orthogonal_spec.rb
@@ -1,26 +1,29 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.orthogonal?" do
-  it "returns false for non orthogonal matrices" do
-    Matrix[[0, 1], [1, 2]].should_not.orthogonal?
-    Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should_not.orthogonal?
-  end
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  it "returns true for orthogonal matrices" do
-    Matrix[[0, 1], [1, 0]].should.orthogonal?
-  end
+  describe "Matrix.orthogonal?" do
+    it "returns false for non orthogonal matrices" do
+      Matrix[[0, 1], [1, 2]].should_not.orthogonal?
+      Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should_not.orthogonal?
+    end
+
+    it "returns true for orthogonal matrices" do
+      Matrix[[0, 1], [1, 0]].should.orthogonal?
+    end
 
-  it "raises an error for rectangular matrices" do
-    [
-      Matrix[[0], [0]],
-      Matrix[[0, 0]],
-      Matrix.empty(0, 2),
-      Matrix.empty(2, 0),
-    ].each do |rectangular_matrix|
-      -> {
-        rectangular_matrix.orthogonal?
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+    it "raises an error for rectangular matrices" do
+      [
+        Matrix[[0], [0]],
+        Matrix[[0, 0]],
+        Matrix.empty(0, 2),
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.orthogonal?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end