2 files changed, 5 insertions, 5 deletions
diff --git a/spec/ruby/shared/string/end_with.rb b/spec/ruby/shared/string/end_with.rb
index 0e4c1386e8..08f43c1bce 100644
--- a/spec/ruby/shared/string/end_with.rb
+++ b/spec/ruby/shared/string/end_with.rb
@@ -55,7 +55,7 @@ describe :end_with, shared: true do
   it "checks that we are starting to match at the head of a character" do
     "\xC3\xA9".send(@method).should_not.end_with?("\xA9")
     "\xe3\x81\x82".send(@method).should_not.end_with?("\x82")
-    "ab".force_encoding("UTF-16BE").send(@method).should_not.end_with?(
-        "b".force_encoding("UTF-16BE"))
+    "\xd8\x00\xdc\x00".dup.force_encoding("UTF-16BE").send(@method).should_not.end_with?(
+        "\xdc\x00".dup.force_encoding("UTF-16BE"))
   end
 end
diff --git a/spec/ruby/shared/string/times.rb b/spec/ruby/shared/string/times.rb
index be3b622f73..4814f894cf 100644
--- a/spec/ruby/shared/string/times.rb
+++ b/spec/ruby/shared/string/times.rb
@@ -39,18 +39,18 @@ describe :string_times, shared: true do
   end
 
   it "returns a String in the same encoding as self" do
-    str = "\xE3\x81\x82".force_encoding Encoding::UTF_8
+    str = "\xE3\x81\x82".dup.force_encoding Encoding::UTF_8
     result = @object.call(str, 2)
     result.encoding.should equal(Encoding::UTF_8)
   end
 
-  platform_is wordsize: 32 do
+  platform_is c_long_size: 32 do
     it "raises an ArgumentError if the length of the resulting string doesn't fit into a long" do
       -> { @object.call("abc", (2 ** 31) - 1) }.should raise_error(ArgumentError)
     end
   end
 
-  platform_is wordsize: 64 do
+  platform_is c_long_size: 64 do
     it "raises an ArgumentError if the length of the resulting string doesn't fit into a long" do
       -> { @object.call("abc", (2 ** 63) - 1) }.should raise_error(ArgumentError)
     end