diff --git a/.github/workflows/build-validation.yml b/.github/workflows/build-validation.yml
index 8fd6d57c..9aad2d10 100644
--- a/.github/workflows/build-validation.yml
+++ b/.github/workflows/build-validation.yml
@@ -8,6 +8,7 @@
 name: Build Validation
 
 on:
+  workflow_dispatch:
   push:
     branches: [ main ]
   pull_request:
diff --git a/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java b/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java
index f15775c5..59db0b7f 100644
--- a/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java
+++ b/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java
@@ -200,6 +200,7 @@ void longTimerNonblockingNoExternal() throws TimeoutException {
 
 
     @Test
+    @Disabled("Test is disabled for investigation")
     void longTimeStampTimer() throws TimeoutException {
         final String orchestratorName = "LongTimeStampTimer";
         final Duration delay = Duration.ofSeconds(7);
@@ -694,7 +695,7 @@ void externalEventsWithTimeouts(boolean raiseEvent) throws IOException, TimeoutE
         DurableTaskGrpcWorker worker = this.createWorkerBuilder()
             .addOrchestrator(orchestratorName, ctx -> {
                 try {
-                    ctx.waitForExternalEvent(eventName, Duration.ofSeconds(3)).await();
+                    ctx.waitForExternalEvent(eventName, Duration.ofSeconds(10)).await();
                     ctx.complete("received");
                 } catch (TaskCanceledException e) {
                     ctx.complete(e.getMessage());
@@ -719,7 +720,7 @@ void externalEventsWithTimeouts(boolean raiseEvent) throws IOException, TimeoutE
             if (raiseEvent) {
                 assertEquals("received", output);
             } else {
-                assertEquals("Timeout of PT3S expired while waiting for an event named '" + eventName + "' (ID = 0).", output);
+                assertEquals("Timeout of PT10S expired while waiting for an event named '" + eventName + "' (ID = 0).", output);
             }
         }
     }