diff --git a/test/framework/src/main/java/org/elasticsearch/entitlement/bootstrap/TestEntitlementsRule.java b/test/framework/src/main/java/org/elasticsearch/entitlement/bootstrap/TestEntitlementsRule.java
index 1c057de296e9b..d6db357102018 100644
--- a/test/framework/src/main/java/org/elasticsearch/entitlement/bootstrap/TestEntitlementsRule.java
+++ b/test/framework/src/main/java/org/elasticsearch/entitlement/bootstrap/TestEntitlementsRule.java
@@ -65,6 +65,7 @@ public void evaluate() throws Throwable {
                         try {
                             pathLookup.reset();
                             policyManager.setActive(false == withoutEntitlements);
+                            ESTestCase.ensureSupportedLocale(); // In case Locale.setDefault(Locale.ENGLISH) is needed
                             policyManager.setTriviallyAllowingTestCode(false == withEntitlementsOnTestCode);
                             if (entitledPackages != null) {
                                 assert entitledPackages.value().length > 0 : "No test packages specified in @EntitledTestPackages";