diff --git a/src/xunit.execution/Sdk/Frameworks/Runners/XunitTestAssemblyRunner.cs b/src/xunit.execution/Sdk/Frameworks/Runners/XunitTestAssemblyRunner.cs
index 3ff8f1000..25dcb8421 100644
--- a/src/xunit.execution/Sdk/Frameworks/Runners/XunitTestAssemblyRunner.cs
+++ b/src/xunit.execution/Sdk/Frameworks/Runners/XunitTestAssemblyRunner.cs
@@ -265,14 +265,13 @@ protected override async Task<RunSummary> RunTestCollectionsAsync(IMessageBus me
         }
 
         /// <inheritdoc/>
-        protected override Task<RunSummary> RunTestCollectionAsync(IMessageBus messageBus, ITestCollection testCollection, IEnumerable<IXunitTestCase> testCases, CancellationTokenSource cancellationTokenSource)
+        protected override async Task<RunSummary> RunTestCollectionAsync(IMessageBus messageBus, ITestCollection testCollection, IEnumerable<IXunitTestCase> testCases, CancellationTokenSource cancellationTokenSource)
         {
-
             parallelSemaphore?.Wait();
 
             try
             {
-                return new XunitTestCollectionRunner(testCollection, testCases, DiagnosticMessageSink, messageBus, TestCaseOrderer, new ExceptionAggregator(Aggregator), cancellationTokenSource).RunAsync();
+                return await new XunitTestCollectionRunner(testCollection, testCases, DiagnosticMessageSink, messageBus, TestCaseOrderer, new ExceptionAggregator(Aggregator), cancellationTokenSource).RunAsync();
             }
             finally
             {