diff --git a/testing/node-driver/src/main/java/net/corda/testing/driver/SharedMemoryIncremental.java b/testing/node-driver/src/main/java/net/corda/testing/driver/SharedMemoryIncremental.java
index fe0d957499..ae5a927186 100644
--- a/testing/node-driver/src/main/java/net/corda/testing/driver/SharedMemoryIncremental.java
+++ b/testing/node-driver/src/main/java/net/corda/testing/driver/SharedMemoryIncremental.java
@@ -17,7 +17,7 @@ import java.nio.channels.FileChannel;
  * import sun.misc.Unsafe;
  * import sun.nio.ch.DirectBuffer;
  */
-class SharedMemoryIncremental extends PortAllocation {
+public class SharedMemoryIncremental extends PortAllocation {
 
     static private final int DEFAULT_START_PORT = 10_000;
     static private final int FIRST_EPHEMERAL_PORT = 30_000;