diff --git a/test/Microsoft.Sbom.Api.Tests/Config/ConfigurationBuilderTestsBase.cs b/test/Microsoft.Sbom.Api.Tests/Config/ConfigurationBuilderTestsBase.cs
index 73c48d5c..13640dad 100644
--- a/test/Microsoft.Sbom.Api.Tests/Config/ConfigurationBuilderTestsBase.cs
+++ b/test/Microsoft.Sbom.Api.Tests/Config/ConfigurationBuilderTestsBase.cs
@@ -62,6 +62,6 @@ object Ctor(Type type)
         mapper = mapperConfiguration.CreateMapper();
     }
 
-    protected const string JSONConfigWithManifestPath = "{ \"ManifestDirPath\": \"manifestDirPath\"}";
-    protected const string JSONConfigGoodWithManifestInfo = "{ \"ManifestInfo\": [{ \"Name\":\"manifest\", \"Version\":\"1\"}]}";
+    protected const string JSONConfigWithManifestPath = $"{{ \"ManifestDirPath\": \"manifestDirPath\"}}";
+    protected const string JSONConfigGoodWithManifestInfo = $"{{ \"ManifestInfo\": [{{ \"Name\":\"manifest\", \"Version\":\"1\"}}]}}";
 }