1 files changed, 8 insertions, 7 deletions
diff --git a/spec/ruby/core/string/shared/succ.rb b/spec/ruby/core/string/shared/succ.rb
index 24a729ce26..8f1d327741 100644
--- a/spec/ruby/core/string/shared/succ.rb
+++ b/spec/ruby/core/string/shared/succ.rb
@@ -1,4 +1,4 @@
-# -*- encoding: binary -*-
+# encoding: binary
 describe :string_succ, shared: true do
   it "returns an empty string for empty strings" do
     "".send(@method).should == ""
@@ -60,9 +60,9 @@ describe :string_succ, shared: true do
   end
 
   it "returns String instances when called on a subclass" do
-    StringSpecs::MyString.new("").send(@method).should be_an_instance_of(String)
-    StringSpecs::MyString.new("a").send(@method).should be_an_instance_of(String)
-    StringSpecs::MyString.new("z").send(@method).should be_an_instance_of(String)
+    StringSpecs::MyString.new("").send(@method).should.instance_of?(String)
+    StringSpecs::MyString.new("a").send(@method).should.instance_of?(String)
+    StringSpecs::MyString.new("z").send(@method).should.instance_of?(String)
   end
 
   it "returns a String in the same encoding as self" do
@@ -73,14 +73,15 @@ end
 describe :string_succ_bang, shared: true do
   it "is equivalent to succ, but modifies self in place (still returns self)" do
     ["", "abcd", "THX1138"].each do |s|
+      s = +s
       r = s.dup.send(@method)
-      s.send(@method).should equal(s)
+      s.send(@method).should.equal?(s)
       s.should == r
     end
   end
 
   it "raises a FrozenError if self is frozen" do
-    -> { "".freeze.send(@method)     }.should raise_error(FrozenError)
-    -> { "abcd".freeze.send(@method) }.should raise_error(FrozenError)
+    -> { "".freeze.send(@method)     }.should.raise(FrozenError)
+    -> { "abcd".freeze.send(@method) }.should.raise(FrozenError)
   end
 end