fix test execution

tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Progressive.cs

@@ -40,10 +40,13 @@ namespace SixLabors.ImageSharp.Tests.Formats.Jpg
             }
 
             string providerDump = BasicSerializer.Serialize(provider);
+
+            // RunTest(providerDump, enforceDiscontiguousBuffers ? "Disco" : string.Empty);
             RemoteExecutor.Invoke(
                 RunTest,
                 providerDump,
-                enforceDiscontiguousBuffers ? "Disco" : string.Empty);
+                enforceDiscontiguousBuffers ? "Disco" : string.Empty)
+                .Dispose();
         }
     }
 }