diff --git a/src/java/org/apache/cassandra/utils/FBUtilities.java b/src/java/org/apache/cassandra/utils/FBUtilities.java
index 115cd4354c..9b39f2d637 100644
--- a/src/java/org/apache/cassandra/utils/FBUtilities.java
+++ b/src/java/org/apache/cassandra/utils/FBUtilities.java
@@ -72,6 +72,11 @@ import org.apache.cassandra.net.AsyncOneResponse;
 
 public class FBUtilities
 {
+    static
+    {
+        preventIllegalAccessWarnings();
+    }
+
     private static final Logger logger = LoggerFactory.getLogger(FBUtilities.class);
 
     private static final ObjectMapper jsonMapper = new ObjectMapper(new JsonFactory());
diff --git a/test/unit/org/apache/cassandra/io/util/BufferedDataOutputStreamTest.java b/test/unit/org/apache/cassandra/io/util/BufferedDataOutputStreamTest.java
index 7c1a0da181..c5c3b6066b 100644
--- a/test/unit/org/apache/cassandra/io/util/BufferedDataOutputStreamTest.java
+++ b/test/unit/org/apache/cassandra/io/util/BufferedDataOutputStreamTest.java
@@ -44,10 +44,15 @@ import com.google.common.primitives.UnsignedBytes;
 import com.google.common.primitives.UnsignedInteger;
 import com.google.common.primitives.UnsignedLong;
 
+import static org.apache.cassandra.utils.FBUtilities.preventIllegalAccessWarnings;
 import static org.junit.Assert.*;
 
 public class BufferedDataOutputStreamTest
 {
+    static
+    {
+        preventIllegalAccessWarnings();
+    }
 
     @Test(expected = BufferOverflowException.class)
     public void testDataOutputBufferFixedByes() throws Exception
diff --git a/test/unit/org/apache/cassandra/tools/ToolsTester.java b/test/unit/org/apache/cassandra/tools/ToolsTester.java
index 391c9b941b..0bb9bebe36 100644
--- a/test/unit/org/apache/cassandra/tools/ToolsTester.java
+++ b/test/unit/org/apache/cassandra/tools/ToolsTester.java
@@ -39,6 +39,7 @@ import org.junit.BeforeClass;
 
 import org.slf4j.LoggerFactory;
 
+import static org.apache.cassandra.utils.FBUtilities.preventIllegalAccessWarnings;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -49,6 +50,11 @@ import static org.junit.Assert.fail;
  */
 public abstract class ToolsTester
 {
+    static
+    {
+        preventIllegalAccessWarnings();
+    }
+
     private static List<ThreadInfo> initialThreads;
 
     static final String[] EXPECTED_THREADS_WITH_SCHEMA = {