diff --git a/spec/addressable/uri_spec.rb b/spec/addressable/uri_spec.rb
index 4e3aced9..b1f95417 100644
--- a/spec/addressable/uri_spec.rb
+++ b/spec/addressable/uri_spec.rb
@@ -1060,9 +1060,7 @@ def to_s
   end
 
   it "should not allow destructive operations" do
-    ruby_check = Gem::Version.new(RUBY_VERSION) < Gem::Version.new("2.5.0")
-    error = ruby_check ? RuntimeError : FrozenError
-    expect { @uri.normalize! }.to raise_error(error)
+    expect { @uri.normalize! }.to raise_error(RuntimeError)
   end
 end