1 files changed, 5 insertions, 5 deletions
diff --git a/spec/ruby/language/encoding_spec.rb b/spec/ruby/language/encoding_spec.rb
index fb36a9618e..e761a53cb6 100644
--- a/spec/ruby/language/encoding_spec.rb
+++ b/spec/ruby/language/encoding_spec.rb
@@ -13,15 +13,15 @@ describe "The __ENCODING__ pseudo-variable" do
   end
 
   it "is the evaluated strings's one inside an eval" do
-    eval("__ENCODING__".force_encoding("US-ASCII")).should == Encoding::US_ASCII
-    eval("__ENCODING__".force_encoding("BINARY")).should == Encoding::BINARY
+    eval("__ENCODING__".dup.force_encoding("US-ASCII")).should == Encoding::US_ASCII
+    eval("__ENCODING__".dup.force_encoding("BINARY")).should == Encoding::BINARY
   end
 
   it "is the encoding specified by a magic comment inside an eval" do
-    code = "# encoding: BINARY\n__ENCODING__".force_encoding("US-ASCII")
+    code = "# encoding: BINARY\n__ENCODING__".dup.force_encoding("US-ASCII")
     eval(code).should == Encoding::BINARY
 
-    code = "# encoding: us-ascii\n__ENCODING__".force_encoding("BINARY")
+    code = "# encoding: us-ascii\n__ENCODING__".dup.force_encoding("BINARY")
     eval(code).should == Encoding::US_ASCII
   end
 
@@ -31,6 +31,6 @@ describe "The __ENCODING__ pseudo-variable" do
   end
 
   it "raises a SyntaxError if assigned to" do
-    lambda { eval("__ENCODING__ = 1") }.should raise_error(SyntaxError)
+    -> { eval("__ENCODING__ = 1") }.should raise_error(SyntaxError)
   end
 end