diff --git a/x-pack/qa/evil-tests/build.gradle b/x-pack/qa/evil-tests/build.gradle
index ad32645b3647c..553386bdfdf60 100644
--- a/x-pack/qa/evil-tests/build.gradle
+++ b/x-pack/qa/evil-tests/build.gradle
@@ -6,6 +6,9 @@ dependencies {
 }
 
 unitTest {
+    if (project.runtimeJavaVersion >= JavaVersion.VERSION_1_9) {
+        systemProperty 'java.locale.providers', 'COMPAT'
+    }
     systemProperty 'tests.security.manager', 'false'
     include '**/*Tests.class'
 }
diff --git a/x-pack/qa/evil-tests/src/test/java/org/elasticsearch/xpack/security/authc/kerberos/SimpleKdcLdapServerTests.java b/x-pack/qa/evil-tests/src/test/java/org/elasticsearch/xpack/security/authc/kerberos/SimpleKdcLdapServerTests.java
index 78ee814812c83..427425991b282 100644
--- a/x-pack/qa/evil-tests/src/test/java/org/elasticsearch/xpack/security/authc/kerberos/SimpleKdcLdapServerTests.java
+++ b/x-pack/qa/evil-tests/src/test/java/org/elasticsearch/xpack/security/authc/kerberos/SimpleKdcLdapServerTests.java
@@ -11,7 +11,6 @@
 import com.unboundid.ldap.sdk.SearchScope;
 
 import org.elasticsearch.action.support.PlainActionFuture;
-import org.elasticsearch.bootstrap.JavaVersion;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.settings.SecureString;
 import org.elasticsearch.env.Environment;
@@ -51,9 +50,6 @@ public void testPrincipalCreationAndSearchOnLdap() throws Exception {
     }
 
     public void testClientServiceMutualAuthentication() throws PrivilegedActionException, GSSException, LoginException, ParseException {
-        assumeFalse("Java 15-ea causes issues with this test, see https://github.com/elastic/elasticsearch/issues/57749",
-            JavaVersion.current().compareTo(JavaVersion.parse("15")) >= 0);
-
         final String serviceUserName = randomFrom(serviceUserNames);
         // Client login and init token preparation
         final String clientUserName = randomFrom(clientUserNames);