1 files changed, 5 insertions, 5 deletions
diff --git a/spec/ruby/core/string/rstrip_spec.rb b/spec/ruby/core/string/rstrip_spec.rb
index 9482765e89..0a01ffad73 100644
--- a/spec/ruby/core/string/rstrip_spec.rb
+++ b/spec/ruby/core/string/rstrip_spec.rb
@@ -42,13 +42,13 @@ describe "String#rstrip!" do
     a.should == "hello"
   end
 
-  it "raises a #{frozen_error_class} on a frozen instance that is modified" do
-    -> { "  hello  ".freeze.rstrip! }.should raise_error(frozen_error_class)
+  it "raises a FrozenError on a frozen instance that is modified" do
+    -> { "  hello  ".freeze.rstrip! }.should raise_error(FrozenError)
   end
 
   # see [ruby-core:23666]
-  it "raises a #{frozen_error_class} on a frozen instance that would not be modified" do
-    -> { "hello".freeze.rstrip! }.should raise_error(frozen_error_class)
-    -> { "".freeze.rstrip!      }.should raise_error(frozen_error_class)
+  it "raises a FrozenError on a frozen instance that would not be modified" do
+    -> { "hello".freeze.rstrip! }.should raise_error(FrozenError)
+    -> { "".freeze.rstrip!      }.should raise_error(FrozenError)
   end
 end