1 files changed, 3 insertions, 3 deletions
diff --git a/spec/ruby/library/stringio/set_encoding_by_bom_spec.rb b/spec/ruby/library/stringio/set_encoding_by_bom_spec.rb
index 1030aad042..b4583a7ad7 100644
--- a/spec/ruby/library/stringio/set_encoding_by_bom_spec.rb
+++ b/spec/ruby/library/stringio/set_encoding_by_bom_spec.rb
@@ -6,7 +6,7 @@ describe "StringIO#set_encoding_by_bom" do
   it "returns nil if not readable" do
     io = StringIO.new("".b, "wb")
 
-    io.set_encoding_by_bom.should be_nil
+    io.set_encoding_by_bom.should == nil
     io.external_encoding.should == Encoding::ASCII_8BIT
   end
 
@@ -82,7 +82,7 @@ describe "StringIO#set_encoding_by_bom" do
 
   it "returns nil if io is empty" do
     io = StringIO.new("".b, "rb")
-    io.set_encoding_by_bom.should be_nil
+    io.set_encoding_by_bom.should == nil
     io.external_encoding.should == Encoding::ASCII_8BIT
   end
 
@@ -227,7 +227,7 @@ describe "StringIO#set_encoding_by_bom" do
   it "raises FrozenError when io is frozen" do
     io = StringIO.new()
     io.freeze
-    -> { io.set_encoding_by_bom }.should raise_error(FrozenError)
+    -> { io.set_encoding_by_bom }.should.raise(FrozenError)
   end
 
   it "does not raise FrozenError when initial string is frozen" do