diff --git a/Dfe.Data.Common.Infrastructure.CognitiveSearch/Tests/CompositionRootTests.cs b/Dfe.Data.Common.Infrastructure.CognitiveSearch/Tests/CompositionRootTests.cs
index c005d53..74e81bc 100644
--- a/Dfe.Data.Common.Infrastructure.CognitiveSearch/Tests/CompositionRootTests.cs
+++ b/Dfe.Data.Common.Infrastructure.CognitiveSearch/Tests/CompositionRootTests.cs
@@ -58,7 +58,7 @@ await searchByKeywordService
                         searchKeyword: "Test",
                         searchIndex: "Index",
                         searchOptions: new Azure.Search.Documents.SearchOptions()
-                    );
+                    )!;
 
             response.Should().NotBeNull();
         }