diff --git a/test262o.conf b/test262o.conf
index 669dead..96f8667 100644
--- a/test262o.conf
+++ b/test262o.conf
@@ -406,5 +406,8 @@ test262o/test/suite/ch11/11.13/11.13.1/11.13.1-1-2.js
 test262o/test/suite/ch11/11.13/11.13.1/11.13.1-1-3.js
 test262o/test/suite/ch11/11.13/11.13.1/11.13.1-1-4.js
 
+# String.prototype.localeCompare special cases
+test262o/test/suite/ch15/15.5/15.5.4/15.5.4.9/15.5.4.9_CE.js
+
 [tests]
 # list test files or use config.testdir