diff --git a/src/dawn/native/Device.cpp b/src/dawn/native/Device.cpp
index a83d1853bb..2093a0a208 100644
--- a/src/dawn/native/Device.cpp
+++ b/src/dawn/native/Device.cpp
@@ -734,6 +734,9 @@ bool DeviceBase::IsDeviceIdle() {
     if (mAsyncTaskManager->HasPendingTasks()) {
         return false;
     }
+    if (!mCallbackTaskManager->IsEmpty()) {
+        return false;
+    }
 
     ExecutionSerial maxSerial = std::max(mLastSubmittedSerial, mFutureSerial);
     if (mCompletedSerial == maxSerial) {