[Solved] [1.13.2] How to prevent client side classes being loaded on server?

I am getting this error when trying to run the test server:

java.lang.RuntimeException: Attempted to load class net/minecraft/client/renderer/entity/Render for invalid dist DEDICATED_SERVER

It is because of:

private void registerRenders(ModelRegistryEvent e)
{
   RenderingRegistry.registerEntityRenderingHandler(EntityTest.class, (RenderManager manager) -> new RenderTestEntity(manager));
}

I thought using this might prevent that from happening but it does not:

DistExecutor.runWhenOn(Dist.CLIENT, () -> () -> {
   MinecraftForge.EVENT_BUS.addListener(this::registerRenders);
});

What can I do to prevent the server from trying to load client side classes?

Edited May 31, 20196 yr by harison513