diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e131077..59bc03c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,48 +1,48 @@
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
   rev: v2.4.0
   hooks:
   - id: trailing-whitespace
   - id: check-json
   - id: check-yaml
 
 - repo: https://gitlab.com/pycqa/flake8
   rev: 3.8.3
   hooks:
   - id: flake8
 
 - repo: https://github.com/codespell-project/codespell
   rev: v1.16.0
   hooks:
   - id: codespell
 
 - repo: local
   hooks:
   - id: mypy
     name: mypy
     entry: mypy
-    args: [swh, '--exclude', '^swh/loader/cvs/(rcsparse|cvs2gitdump)/']
+    args: [swh, '--show-traceback']
     pass_filenames: false
     language: system
     types: [python]
 
 # unfortunately, we are far from being able to enable this...
 # - repo: https://github.com/PyCQA/pydocstyle.git
 #   rev: 4.0.0
 #   hooks:
 #   - id: pydocstyle
 #     name: pydocstyle
 #     description: pydocstyle is a static analysis tool for checking compliance with Python docstring conventions.
 #     entry: pydocstyle --convention=google
 #     language: python
 #     types: [python]
 
 - repo: https://github.com/PyCQA/isort
   rev: 5.5.2
   hooks:
   - id: isort
 
 - repo: https://github.com/python/black
   rev: 19.10b0
   hooks:
   - id: black
diff --git a/mypy.ini b/mypy.ini
index afecb2c..ec31441 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1,24 +1,25 @@
 [mypy]
 namespace_packages = True
 warn_unused_ignores = True
+exclude = ^swh/loader/cvs/(rcsparse|cvs2gitdump)/
 
 
 # 3rd party libraries without stubs (yet)
 
 [mypy-pkg_resources.*]
 ignore_missing_imports = True
 
 [mypy-celery.*]
 ignore_missing_imports = True
 
 [mypy-iso8601.*]
 ignore_missing_imports = True
 
 [mypy-pytest.*]
 ignore_missing_imports = True
 
 [mypy-swh.loader.*]
 ignore_missing_imports = True
 
 [mypy-urllib3.util.*]
 ignore_missing_imports = True