3 files changed, 8 insertions, 4 deletions
diff --git a/spec/ruby/library/zlib/deflate/deflate_spec.rb b/spec/ruby/library/zlib/deflate/deflate_spec.rb
index 828880f8d8..e16e6ad0ef 100644
--- a/spec/ruby/library/zlib/deflate/deflate_spec.rb
+++ b/spec/ruby/library/zlib/deflate/deflate_spec.rb
@@ -23,7 +23,7 @@ describe "Zlib::Deflate.deflate" do
 
   it "deflates chunked data" do
     random_generator = Random.new(0)
-    deflated         = ''
+    deflated         = +''
 
     Zlib::Deflate.deflate(random_generator.bytes(20000)) do |chunk|
       deflated << chunk
@@ -58,6 +58,11 @@ describe "Zlib::Deflate#deflate" do
                       Array.new(31, 0) +
                       [24, 128, 0, 0, 1]).pack('C*')
   end
+
+  it "has a binary encoding" do
+    @deflator.deflate("").encoding.should == Encoding::BINARY
+    @deflator.finish.encoding.should == Encoding::BINARY
+  end
 end
 
 describe "Zlib::Deflate#deflate" do
@@ -65,7 +70,7 @@ describe "Zlib::Deflate#deflate" do
   before :each do
     @deflator         = Zlib::Deflate.new
     @random_generator = Random.new(0)
-    @original         = ''
+    @original         = +''
     @chunks           = []
   end
 
diff --git a/spec/ruby/library/zlib/deflate/new_spec.rb b/spec/ruby/library/zlib/deflate/new_spec.rb
deleted file mode 100644
index e15f14f95f..0000000000
--- a/spec/ruby/library/zlib/deflate/new_spec.rb
+++ /dev/null
@@ -1 +0,0 @@
-require_relative '../../../spec_helper'
diff --git a/spec/ruby/library/zlib/deflate/params_spec.rb b/spec/ruby/library/zlib/deflate/params_spec.rb
index 0b1cca8c8a..0242653528 100644
--- a/spec/ruby/library/zlib/deflate/params_spec.rb
+++ b/spec/ruby/library/zlib/deflate/params_spec.rb
@@ -3,7 +3,7 @@ require 'zlib'
 
 describe "Zlib::Deflate#params" do
   it "changes the deflate parameters" do
-    data = 'abcdefghijklm'
+    data = +'abcdefghijklm'
 
     d = Zlib::Deflate.new Zlib::NO_COMPRESSION, Zlib::MAX_WBITS,
     Zlib::DEF_MEM_LEVEL, Zlib::DEFAULT_STRATEGY