diff --git a/src/test/kotlin/core/messaging/InMemoryNetwork.kt b/src/test/kotlin/core/messaging/InMemoryNetwork.kt
index 80180384ec..090562ee04 100644
--- a/src/test/kotlin/core/messaging/InMemoryNetwork.kt
+++ b/src/test/kotlin/core/messaging/InMemoryNetwork.kt
@@ -11,8 +11,7 @@ package core.messaging
 import com.google.common.util.concurrent.Futures
 import com.google.common.util.concurrent.ListenableFuture
 import com.google.common.util.concurrent.MoreExecutors
-import core.Party
-import core.crypto.generateKeyPair
+import core.DummyTimestampingAuthority
 import core.crypto.sha256
 import core.node.TimestamperNodeService
 import core.utilities.loggerFor
@@ -126,10 +125,8 @@ public class InMemoryNetwork {
         check(timestampingAdvert == null)
         val (handle, builder) = createNode(manuallyPumped)
         val node = builder.start().get()
-        val key = generateKeyPair()
-        val identity = Party("Unit test timestamping authority", key.public)
-        TimestamperNodeService(node, identity, key)
-        timestampingAdvert = LegallyIdentifiableNode(handle, identity)
+        TimestamperNodeService(node, DummyTimestampingAuthority.identity, DummyTimestampingAuthority.key)
+        timestampingAdvert = LegallyIdentifiableNode(handle, DummyTimestampingAuthority.identity)
         return Pair(timestampingAdvert!!, node)
     }