1 files changed, 11 insertions, 8 deletions
diff --git a/spec/ruby/library/prime/integer/from_prime_division_spec.rb b/spec/ruby/library/prime/integer/from_prime_division_spec.rb
index e0e74fb336..5422bc651c 100644
--- a/spec/ruby/library/prime/integer/from_prime_division_spec.rb
+++ b/spec/ruby/library/prime/integer/from_prime_division_spec.rb
@@ -1,13 +1,16 @@
 require_relative '../../../spec_helper'
-require 'prime'
 
-describe "Integer.from_prime_division" do
-  it "returns the product of the given factorization" do
-    Integer.from_prime_division([[2,3], [3,3], [5,3], [7,3], [11,3], [13,3], [17,3]]).
-      should == 2**3 * 3**3 * 5**3 * 7**3 * 11**3 * 13**3 * 17**3
-  end
+ruby_version_is ""..."3.1" do
+  require 'prime'
+
+  describe "Integer.from_prime_division" do
+    it "returns the product of the given factorization" do
+      Integer.from_prime_division([[2,3], [3,3], [5,3], [7,3], [11,3], [13,3], [17,3]]).
+        should == 2**3 * 3**3 * 5**3 * 7**3 * 11**3 * 13**3 * 17**3
+    end
 
-  it "returns 1 for an empty factorization" do
-    Integer.from_prime_division([]).should == 1
+    it "returns 1 for an empty factorization" do
+      Integer.from_prime_division([]).should == 1
+    end
   end
 end