diff --git a/src/yunit/TestAdapter.cs b/src/yunit/TestAdapter.cs
index a145057..06f3b8b 100644
--- a/src/yunit/TestAdapter.cs
+++ b/src/yunit/TestAdapter.cs
@@ -242,6 +242,7 @@ private async Task RunTest(ITestExecutionRecorder log, TestCase test, bool inOnl
             finally
             {
                 result.EndTime = DateTime.UtcNow;
+                result.Duration = result.EndTime - result.StartTime;
 
                 lock (s_lock)
                 {