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-rw-r--r--spec/ruby/core/set/classify_spec.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/spec/ruby/core/set/classify_spec.rb b/spec/ruby/core/set/classify_spec.rb
index d86ea2722d..a225ab7cbb 100644
--- a/spec/ruby/core/set/classify_spec.rb
+++ b/spec/ruby/core/set/classify_spec.rb
@@ -13,7 +13,7 @@ describe "Set#classify" do
it "returns an Enumerator when passed no block" do
enum = @set.classify
- enum.should be_an_instance_of(Enumerator)
+ enum.should.instance_of?(Enumerator)
classified = enum.each { |x| x.length }
classified.should == { 3 => Set["one", "two"], 4 => Set["four"], 5 => Set["three"] }