diff --git a/tests/Umbraco.Tests.UnitTests/Umbraco.PublishedCache.NuCache/SnapDictionaryTests.cs b/tests/Umbraco.Tests.UnitTests/Umbraco.PublishedCache.NuCache/SnapDictionaryTests.cs
index c25b2fde1e..fdb29f88e6 100644
--- a/tests/Umbraco.Tests.UnitTests/Umbraco.PublishedCache.NuCache/SnapDictionaryTests.cs
+++ b/tests/Umbraco.Tests.UnitTests/Umbraco.PublishedCache.NuCache/SnapDictionaryTests.cs
@@ -323,6 +323,7 @@ namespace Umbraco.Cms.Tests.UnitTests.Umbraco.PublishedCache.NuCache
         }
 
         [Test]
+        [Retry(5)] // TODO make this test non-flaky.
         public async Task EventuallyCollectNulls()
         {
             var d = new SnapDictionary<int, string>();