Use FrozenError instead of frozen_error_class

1 files changed, 2 insertions, 2 deletions

diff --git a/spec/ruby/library/stringio/open_spec.rb b/spec/ruby/library/stringio/open_spec.rb
index adb784c890..acab6e9056 100644
--- a/spec/ruby/library/stringio/open_spec.rb
+++ b/spec/ruby/library/stringio/open_spec.rb
@@ -134,8 +134,8 @@ describe "StringIO.open when passed [Object, mode]" do
     io.closed_write?.should be_false
   end
 
-  it "raises a #{frozen_error_class} when passed a frozen String in truncate mode as StringIO backend" do
-    -> { StringIO.open("example".freeze, IO::TRUNC) }.should raise_error(frozen_error_class)
+  it "raises a FrozenError when passed a frozen String in truncate mode as StringIO backend" do
+    -> { StringIO.open("example".freeze, IO::TRUNC) }.should raise_error(FrozenError)
   end
 
   it "tries to convert the passed mode to a String using #to_str" do