diff --git a/server/build.gradle b/server/build.gradle
index 0e154d2287b56..38e62d94c7430 100644
--- a/server/build.gradle
+++ b/server/build.gradle
@@ -149,6 +149,7 @@ if (BuildParams.isSnapshotBuild() == false) {
 
 tasks.named("test").configure {
     systemProperty 'es.insecure_network_trace_enabled', 'true'
+    maxParallelForks = 1
 }
 
 tasks.named("thirdPartyAudit").configure {
diff --git a/server/src/test/java/org/elasticsearch/common/logging/JULBridgeTests.java b/server/src/test/java/org/elasticsearch/common/logging/JULBridgeTests.java
index 950859f3b1193..5f86c6ba559ae 100644
--- a/server/src/test/java/org/elasticsearch/common/logging/JULBridgeTests.java
+++ b/server/src/test/java/org/elasticsearch/common/logging/JULBridgeTests.java
@@ -21,9 +21,9 @@
 import org.junit.BeforeClass;
 
 import java.util.logging.ConsoleHandler;
+import java.util.logging.Handler;
 
 import static org.hamcrest.CoreMatchers.equalTo;
-import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.arrayContaining;
 import static org.hamcrest.Matchers.instanceOf;
 
@@ -31,7 +31,7 @@ public class JULBridgeTests extends ESTestCase {
 
     private static final java.util.logging.Logger logger = java.util.logging.Logger.getLogger("");
     private static java.util.logging.Level savedLevel;
-    private static java.util.logging.Handler[] savedHandlers;
+    private static Handler[] savedHandlers;
 
     @BeforeClass
     public static void saveLoggerState() {
@@ -60,10 +60,12 @@ public static void restoreLoggerState() {
 
     private void assertLogged(Runnable loggingCode, LoggingExpectation... expectations) {
         Logger testLogger = LogManager.getLogger("");
-        Loggers.setLevel(testLogger, Level.ALL);
+        Level savedLevel = testLogger.getLevel();
         MockLogAppender mockAppender = new MockLogAppender();
-        mockAppender.start();
+
         try {
+            Loggers.setLevel(testLogger, Level.ALL);
+            mockAppender.start();
             Loggers.addAppender(testLogger, mockAppender);
             for (var expectation : expectations) {
                 mockAppender.addExpectation(expectation);
@@ -71,6 +73,7 @@ private void assertLogged(Runnable loggingCode, LoggingExpectation... expectatio
             loggingCode.run();
             mockAppender.assertAllExpectationsMatched();
         } finally {
+            Loggers.setLevel(testLogger, savedLevel);
             Loggers.removeAppender(testLogger, mockAppender);
             mockAppender.stop();
         }
diff --git a/server/src/test/java/org/elasticsearch/snapshots/SnapshotResiliencyTests.java b/server/src/test/java/org/elasticsearch/snapshots/SnapshotResiliencyTests.java
index a04273186dca7..1b5ff3f39be22 100644
--- a/server/src/test/java/org/elasticsearch/snapshots/SnapshotResiliencyTests.java
+++ b/server/src/test/java/org/elasticsearch/snapshots/SnapshotResiliencyTests.java
@@ -10,7 +10,6 @@
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.apache.lucene.tests.util.LuceneTestCase;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.action.ActionListener;
@@ -228,7 +227,6 @@
 import static org.hamcrest.Matchers.notNullValue;
 import static org.mockito.Mockito.mock;
 
-@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/100434")
 public class SnapshotResiliencyTests extends ESTestCase {
 
     private DeterministicTaskQueue deterministicTaskQueue;