1 files changed, 20 insertions, 17 deletions
diff --git a/spec/ruby/library/prime/prime_division_spec.rb b/spec/ruby/library/prime/prime_division_spec.rb
index 6293478f59..4c93d5936a 100644
--- a/spec/ruby/library/prime/prime_division_spec.rb
+++ b/spec/ruby/library/prime/prime_division_spec.rb
@@ -1,25 +1,28 @@
 require_relative '../../spec_helper'
-require 'prime'
 
-describe "Prime.prime_division" do
-  it "returns an array of a prime factor and a corresponding exponent" do
-    Prime.prime_division(2*3*5*7*11*13*17).should ==
-      [[2,1], [3,1], [5,1], [7,1], [11,1], [13,1], [17,1]]
-  end
+ruby_version_is ""..."3.1" do
+  require 'prime'
 
-  it "returns an empty array for 1" do
-    Prime.prime_division(1).should == []
-  end
+  describe "Prime.prime_division" do
+    it "returns an array of a prime factor and a corresponding exponent" do
+      Prime.prime_division(2*3*5*7*11*13*17).should ==
+        [[2,1], [3,1], [5,1], [7,1], [11,1], [13,1], [17,1]]
+    end
 
-  it "returns [[-1, 1]] for -1" do
-    Prime.prime_division(-1).should == [[-1, 1]]
-  end
+    it "returns an empty array for 1" do
+      Prime.prime_division(1).should == []
+    end
 
-  it "includes [[-1, 1]] in the divisors of a negative number" do
-    Prime.prime_division(-10).should include([-1, 1])
-  end
+    it "returns [[-1, 1]] for -1" do
+      Prime.prime_division(-1).should == [[-1, 1]]
+    end
+
+    it "includes [[-1, 1]] in the divisors of a negative number" do
+      Prime.prime_division(-10).should include([-1, 1])
+    end
 
-  it "raises ZeroDivisionError for 0" do
-    -> { Prime.prime_division(0) }.should raise_error(ZeroDivisionError)
+    it "raises ZeroDivisionError for 0" do
+      -> { Prime.prime_division(0) }.should raise_error(ZeroDivisionError)
+    end
   end
 end