diff --git a/core/src/main/kotlin/core/testing/TestUtils.kt b/core/src/main/kotlin/core/testing/TestUtils.kt
index 065501ea21..ea76bdc1f4 100644
--- a/core/src/main/kotlin/core/testing/TestUtils.kt
+++ b/core/src/main/kotlin/core/testing/TestUtils.kt
@@ -146,7 +146,7 @@ open class TransactionForTest : AbstractTransactionForTest() {
 
     protected fun runCommandsAndVerify(time: Instant) {
         val cmds = commandsToAuthenticatedObjects()
-        val tx = TransactionForVerification(inStates, outStates.map { it.state }, emptyList(), cmds, SecureHash.randomSHA256())
+        val tx = TransactionForVerification(inStates, outStates.map { it.state }, emptyList(), cmds, SecureHash.Companion.randomSHA256())
         tx.verify()
     }
 
diff --git a/node/src/test/kotlin/node/services/NotaryServiceTests.kt b/node/src/test/kotlin/node/services/NotaryServiceTests.kt
index 88a1052192..68a84f1cb3 100644
--- a/node/src/test/kotlin/node/services/NotaryServiceTests.kt
+++ b/node/src/test/kotlin/node/services/NotaryServiceTests.kt
@@ -37,7 +37,7 @@ class NotaryServiceTests {
         tx.setTime(Instant.now(), DUMMY_NOTARY, 30.seconds)
         var wtx = tx.toWireTransaction()
 
-        val protocol = NotaryProtocol(wtx, NotaryProtocol.tracker())
+        val protocol = NotaryProtocol(wtx, NotaryProtocol.Companion.tracker())
         val future = clientNode.smm.add(NotaryProtocol.TOPIC, protocol)
         net.runNetwork()
 
@@ -49,7 +49,7 @@ class NotaryServiceTests {
         val inputState = issueState(clientNode)
         val wtx = TransactionBuilder().withItems(inputState).toWireTransaction()
 
-        val protocol = NotaryProtocol(wtx, NotaryProtocol.tracker())
+        val protocol = NotaryProtocol(wtx, NotaryProtocol.Companion.tracker())
         val future = clientNode.smm.add(NotaryProtocol.TOPIC, protocol)
         net.runNetwork()
 
@@ -63,7 +63,7 @@ class NotaryServiceTests {
         tx.setTime(Instant.now().plusSeconds(3600), DUMMY_NOTARY, 30.seconds)
         var wtx = tx.toWireTransaction()
 
-        val protocol = NotaryProtocol(wtx, NotaryProtocol.tracker())
+        val protocol = NotaryProtocol(wtx, NotaryProtocol.Companion.tracker())
         val future = clientNode.smm.add(NotaryProtocol.TOPIC, protocol)
         net.runNetwork()