diff --git a/model/src/main/java/com/salesforce/apollo/model/ProcessDomain.java b/model/src/main/java/com/salesforce/apollo/model/ProcessDomain.java
index 3dee46cf6..2916c89b6 100644
--- a/model/src/main/java/com/salesforce/apollo/model/ProcessDomain.java
+++ b/model/src/main/java/com/salesforce/apollo/model/ProcessDomain.java
@@ -57,7 +57,7 @@ public ProcessDomain(Digest group, ControlledIdentifierMember member, ProcessDom
                           .setpByz(parameters.dhtPbyz)
                           .setId(group)
                           .build();
-        final var dhtUrl = String.format("jdbc:h2:mem:%s-%s;DB_CLOSE_DELAY=-1", member.getId(), "");
+        final var dhtUrl = String.format("jdbc:h2:mem:%s-%s;DB_CLOSE_DELAY=-1", member.getId(), UUID.randomUUID());
         JdbcConnectionPool connectionPool = JdbcConnectionPool.create(dhtUrl, "", "");
         connectionPool.setMaxConnections(10);
         dht = new KerlDHT(parameters.dhtOpsFrequency, base, member, connectionPool, params.digestAlgorithm(),
diff --git a/model/src/test/java/com/salesforce/apollo/model/ContainmentDomainTest.java b/model/src/test/java/com/salesforce/apollo/model/ContainmentDomainTest.java
index 5dd74b968..a33746955 100644
--- a/model/src/test/java/com/salesforce/apollo/model/ContainmentDomainTest.java
+++ b/model/src/test/java/com/salesforce/apollo/model/ContainmentDomainTest.java
@@ -85,8 +85,9 @@ public void before() throws Exception {
             final var member = new ControlledIdentifierMember(id);
             var localRouter = new LocalServer(prefix, member).router(ServerConnectionCache.newBuilder().setTarget(30));
             routers.add(localRouter);
-            var pdParams = new ProcessDomain.ProcessDomainParameters("jdbc:h2:mem:", Duration.ofMinutes(1),
-                                                                     checkpointDirBase, Duration.ofMillis(10), 0.00125,
+            var dbUrl = String.format("jdbc:h2:mem:%s-%s;DB_CLOSE_DELAY=-1", member.getId(), UUID.randomUUID());
+            var pdParams = new ProcessDomain.ProcessDomainParameters(dbUrl, Duration.ofMinutes(1), checkpointDirBase,
+                                                                     Duration.ofMillis(10), 0.00125,
                                                                      Duration.ofMinutes(1), 3, 10, 0.1);
             var domain = new ProcessContainerDomain(group, member, pdParams, params, RuntimeParameters.newBuilder()
                                                                                                       .setFoundation(
@@ -106,7 +107,7 @@ public void before() throws Exception {
 
     @Test
     public void smoke() throws Exception {
-        domains.forEach(Domain::start);
+        domains.forEach(e -> Thread.ofVirtual().start(e::start));
         final var activated = Utils.waitForCondition(60_000, 1_000, () -> domains.stream().allMatch(Domain::active));
         assertTrue(activated, "Domains did not fully activate: " + (domains.stream()
                                                                            .filter(c -> !c.active())
diff --git a/model/src/test/java/com/salesforce/apollo/model/DomainTest.java b/model/src/test/java/com/salesforce/apollo/model/DomainTest.java
index 34b14fbdc..25a714c97 100644
--- a/model/src/test/java/com/salesforce/apollo/model/DomainTest.java
+++ b/model/src/test/java/com/salesforce/apollo/model/DomainTest.java
@@ -215,8 +215,9 @@ public void before() throws Exception {
             final var member = new ControlledIdentifierMember(id);
             var localRouter = new LocalServer(prefix, member).router(ServerConnectionCache.newBuilder().setTarget(30));
             routers.add(localRouter);
-            var pdParams = new ProcessDomain.ProcessDomainParameters("jdbc:h2:mem:", Duration.ofMinutes(1),
-                                                                     checkpointDirBase, Duration.ofMillis(10), 0.00125,
+            var dbUrl = String.format("jdbc:h2:mem:%s-%s;DB_CLOSE_DELAY=-1", member.getId(), UUID.randomUUID());
+            var pdParams = new ProcessDomain.ProcessDomainParameters(dbUrl, Duration.ofMinutes(1), checkpointDirBase,
+                                                                     Duration.ofMillis(10), 0.00125,
                                                                      Duration.ofMinutes(1), 3, 10, 0.1);
             var domain = new ProcessDomain(group, member, pdParams, params, RuntimeParameters.newBuilder()
                                                                                              .setFoundation(sealed)
diff --git a/model/src/test/java/com/salesforce/apollo/model/FireFliesTest.java b/model/src/test/java/com/salesforce/apollo/model/FireFliesTest.java
index caa51b54c..597d99113 100644
--- a/model/src/test/java/com/salesforce/apollo/model/FireFliesTest.java
+++ b/model/src/test/java/com/salesforce/apollo/model/FireFliesTest.java
@@ -87,8 +87,9 @@ public void before() throws Exception {
             var context = new ContextImpl<>(DigestAlgorithm.DEFAULT.getLast(), CARDINALITY, 0.2, 3);
             final var member = new ControlledIdentifierMember(id);
             var localRouter = new LocalServer(prefix, member).router(ServerConnectionCache.newBuilder().setTarget(30));
-            var pdParams = new ProcessDomain.ProcessDomainParameters("jdbc:h2:mem:", Duration.ofSeconds(5),
-                                                                     checkpointDirBase, Duration.ofMillis(10), 0.00125,
+            var dbUrl = String.format("jdbc:h2:mem:%s-%s;DB_CLOSE_DELAY=-1", member.getId(), UUID.randomUUID());
+            var pdParams = new ProcessDomain.ProcessDomainParameters(dbUrl, Duration.ofSeconds(5), checkpointDirBase,
+                                                                     Duration.ofMillis(10), 0.00125,
                                                                      Duration.ofSeconds(5), 3, 10, 0.1);
             var node = new ProcessDomain(group, member, pdParams, params, RuntimeParameters.newBuilder()
                                                                                            .setFoundation(sealed)
@@ -139,12 +140,13 @@ public void viewChange(Context<Participant> context, Digest viewId, List<EventCo
         assertTrue(started.get().await(10, TimeUnit.SECONDS), "Cannot start up kernel");
 
         started.set(new CountDownLatch(CARDINALITY - 1));
-        domains.subList(1, domains.size()).parallelStream().forEach(d -> {
-            d.getFoundation()
-             .start(() -> started.get().countDown(), gossipDuration, seeds,
-                    Executors.newScheduledThreadPool(1, Thread.ofVirtual().factory()));
-        });
-        assertTrue(started.get().await(10, TimeUnit.SECONDS), "could not start views");
+        domains.subList(1, domains.size())
+               .forEach(d -> Thread.ofVirtual()
+                                   .start(() -> d.getFoundation()
+                                                 .start(() -> started.get().countDown(), gossipDuration, seeds,
+                                                        Executors.newScheduledThreadPool(1, Thread.ofVirtual()
+                                                                                                  .factory()))));
+        assertTrue(started.get().await(30, TimeUnit.SECONDS), "could not start views");
 
         assertTrue(countdown.await(30, TimeUnit.SECONDS), "Could not join all members in all views");