diff --git a/src/Microsoft.VisualStudio.Threading/JoinableTaskDependencyGraph.cs b/src/Microsoft.VisualStudio.Threading/JoinableTaskDependencyGraph.cs
index 324467fd5..ab599852e 100644
--- a/src/Microsoft.VisualStudio.Threading/JoinableTaskDependencyGraph.cs
+++ b/src/Microsoft.VisualStudio.Threading/JoinableTaskDependencyGraph.cs
@@ -211,9 +211,9 @@ internal static HashSet<JoinableTask> GetDependentTasksFromCandidates(IEnumerabl
             while (queue.Count > 0)
             {
                 IJoinableTaskDependent startDepenentNode = queue.Dequeue();
-                if (candidates.Contains(startDepenentNode))
+                if (startDepenentNode is JoinableTask startTask && candidates.Contains(startTask))
                 {
-                    results.Add((JoinableTask)startDepenentNode);
+                    results.Add(startTask);
                 }
 
                 lock (startDepenentNode.JoinableTaskContext.SyncContextLock)