diff --git a/setup.cfg b/setup.cfg
index 33aa6561556..57ae1e295f7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,6 +17,7 @@ import-order-style = smarkets
 application-import-names = galaxy,galaxy_test,tool_shed
 
 [mypy]
+show_error_codes = True
 ignore_missing_imports = True
 check_untyped_defs = True
 exclude = lib/galaxy/tools/bundled|test/functional