diff --git a/Test/Unit/TransformationTest.cs b/Test/Unit/TransformationTest.cs
index ef53a144..3bf5fb0a 100644
--- a/Test/Unit/TransformationTest.cs
+++ b/Test/Unit/TransformationTest.cs
@@ -33,7 +33,11 @@ public TransformationTest(ITestOutputHelper output)
             var services = new ServiceCollection();
             services.AddTestLogging(output);
             log = services.BuildServiceProvider().GetRequiredService<ILogger<NodeTransformation>>();
-            ConfigurationUtils.AddTypeConverter(new FieldFilterConverter());
+            try
+            {
+                ConfigurationUtils.AddTypeConverter(new FieldFilterConverter());
+            }
+            catch { }
         }
         [Fact]
         public void TestNameFilter()
diff --git a/Test/Utils/BaseExtractorTestFixture.cs b/Test/Utils/BaseExtractorTestFixture.cs
index df1cd253..fe3adc48 100644
--- a/Test/Utils/BaseExtractorTestFixture.cs
+++ b/Test/Utils/BaseExtractorTestFixture.cs
@@ -44,7 +44,11 @@ protected BaseExtractorTestFixture(PredefinedSetup[] setups = null)
             // Set higher min thread count, this is required due to running both server and client in the same process.
             // The server uses the threadPool in a weird way that can cause starvation if this is set too low.
             ThreadPool.SetMinThreads(20, 20);
-            ConfigurationUtils.AddTypeConverter(new FieldFilterConverter());
+            try
+            {
+                ConfigurationUtils.AddTypeConverter(new FieldFilterConverter());
+            }
+            catch { }
             Services = new ServiceCollection();
             Config = Services.AddConfig<FullConfig>("config.test.yml", 1);
             Config.Source.EndpointUrl = $"opc.tcp://localhost:{Port}";