diff --git a/node/build.gradle b/node/build.gradle
index a536c9f275..bcd228fae2 100644
--- a/node/build.gradle
+++ b/node/build.gradle
@@ -209,6 +209,9 @@ tasks.withType(JavaCompile) {
 task integrationTest(type: Test) {
     testClassesDirs = sourceSets.integrationTest.output.classesDirs
     classpath = sourceSets.integrationTest.runtimeClasspath
+
+    systemProperty 'testing.global.port.allocation.enabled', true
+    systemProperty 'testing.global.port.allocation.starting.port', 10000
 }
 
 jar {
diff --git a/testing/node-driver/src/main/kotlin/net/corda/testing/driver/Driver.kt b/testing/node-driver/src/main/kotlin/net/corda/testing/driver/Driver.kt
index 1b98472fec..4704416d0c 100644
--- a/testing/node-driver/src/main/kotlin/net/corda/testing/driver/Driver.kt
+++ b/testing/node-driver/src/main/kotlin/net/corda/testing/driver/Driver.kt
@@ -118,11 +118,24 @@ abstract class PortAllocation {
     /**
      * An implementation of [PortAllocation] which allocates ports sequentially
      */
-    open class Incremental(startingPort: Int) : PortAllocation() {
+    open class Incremental(private val startingPort: Int) : PortAllocation() {
+        private companion object {
+            private const val FIRST_EPHEMERAL_PORT = 49152
+        }
+
         /** The backing [AtomicInteger] used to keep track of the currently allocated port */
         val portCounter = AtomicInteger(startingPort)
 
-        override fun nextPort() = portCounter.andIncrement
+        override fun nextPort(): Int {
+            return portCounter.getAndUpdate { i ->
+                val next = i + 1
+                if (next >= FIRST_EPHEMERAL_PORT) {
+                    startingPort
+                } else {
+                    next
+                }
+            }
+        }
     }
 }
 
diff --git a/testing/node-driver/src/main/kotlin/net/corda/testing/driver/internal/GlobalTestPortAllocation.kt b/testing/node-driver/src/main/kotlin/net/corda/testing/driver/internal/GlobalTestPortAllocation.kt
index b6736bd5f0..f868bce7ef 100644
--- a/testing/node-driver/src/main/kotlin/net/corda/testing/driver/internal/GlobalTestPortAllocation.kt
+++ b/testing/node-driver/src/main/kotlin/net/corda/testing/driver/internal/GlobalTestPortAllocation.kt
@@ -12,8 +12,8 @@ fun incrementalPortAllocation(startingPortIfNoEnv: Int): PortAllocation {
 
 private object GlobalTestPortAllocation : PortAllocation.Incremental(startingPort = startingPort())
 
-private const val enablingEnvVar = "CORDA_TEST_GLOBAL_PORT_ALLOCATION_ENABLED"
-private const val startingPortEnvVariable = "CORDA_TEST_GLOBAL_PORT_ALLOCATION_STARTING_PORT"
+private const val enablingEnvVar = "TESTING_GLOBAL_PORT_ALLOCATION_ENABLED"
+private const val startingPortEnvVariable = "TESTING_GLOBAL_PORT_ALLOCATION_STARTING_PORT"
 private val enablingSystemProperty = enablingEnvVar.toLowerCase().replace("_", ".")
 private val startingPortSystemProperty = startingPortEnvVariable.toLowerCase().replace("_", ".")
 private const val startingPortDefaultValue = 5000