diff --git a/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/SimpleAppSystemInitializer.java b/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/SimpleAppSystemInitializer.java
index 12a187cb5..ad186d706 100644
--- a/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/SimpleAppSystemInitializer.java
+++ b/naked-objects/integtests/src/test/java/domainapp/integtests/bootstrap/SimpleAppSystemInitializer.java
@@ -25,6 +25,7 @@ package domainapp.integtests.bootstrap;
 
 import org.apache.isis.core.commons.config.IsisConfiguration;
 import org.apache.isis.core.integtestsupport.IsisSystemForTest;
+import org.apache.isis.objectstore.jdo.datanucleus.DataNucleusPersistenceMechanismInstaller;
 import org.apache.isis.objectstore.jdo.datanucleus.IsisConfigurationForJdoIntegTests;
 
 /**
@@ -50,6 +51,7 @@ public final class SimpleAppSystemInitializer {
 
     public SimpleAppSystemBuilder() {
       with(testConfiguration());
+      with(new DataNucleusPersistenceMechanismInstaller());
 
       // services annotated with @DomainService
       withServicesIn("domainapp");
diff --git a/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/SimpleObjectsIntegTest.java b/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/SimpleObjectsIntegTest.java
index 11d108277..2699c5aad 100644
--- a/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/SimpleObjectsIntegTest.java
+++ b/naked-objects/integtests/src/test/java/domainapp/integtests/tests/modules/simple/SimpleObjectsIntegTest.java
@@ -124,9 +124,7 @@ public class SimpleObjectsIntegTest extends SimpleAppIntegTest {
       @SuppressWarnings("UnstableApiUsage")
       protected boolean matchesSafely(Throwable item) {
         final var causalChain = Throwables.getCausalChain(item);
-        return causalChain.stream()
-            .map(Throwable::getClass)
-            .allMatch(cls::isAssignableFrom);
+        return causalChain.stream().map(Throwable::getClass).anyMatch(cls::isAssignableFrom);
       }
 
       @Override