diff --git a/test/docfx.Snapshot.Tests/SamplesTest.cs b/test/docfx.Snapshot.Tests/SamplesTest.cs
index 199067ea6b3..924de0f9f1d 100644
--- a/test/docfx.Snapshot.Tests/SamplesTest.cs
+++ b/test/docfx.Snapshot.Tests/SamplesTest.cs
@@ -112,6 +112,7 @@ await s_viewports.ForEachInParallelAsync(async viewport =>
                 await page.WaitForFunctionAsync("window.docfx.ready");
                 await page.WaitForFunctionAsync("window.docfx.searchReady");
                 await page.EvaluateAsync($"() => document.documentElement.setAttribute('data-bs-theme', '{theme}')");
+                await Task.Delay(200);
 
                 if (url.Contains("?term=cat"))
                 {