diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e803ac91..0a333947 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -22,7 +22,10 @@ repos:
     rev: v0.931
     hooks:
       - id: mypy
-        additional_dependencies: ["pytest", "types-requests", "types-tabulate"]
+        args: [--config, ./mypy.ini]
+        additional_dependencies:
+          ["numpy", "pytest", "requests", "types-requests", "types-tabulate"]
+        stages: [manual]
 
   # Autoformat: YAML, JSON, Markdown, etc.
   - repo: https://github.com/pre-commit/mirrors-prettier
diff --git a/mypy.ini b/mypy.ini
index 8a5f7812..607647ee 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1,8 +1,22 @@
+# MMypy is an optional static type checker for Python that aims to combine
+# the benefits of dynamic (or "duck") typing and static typing.
+# 
+# Documentation: http://www.mypy-lang.org
+# Project: https://github.com/python/mypy
+# Config reference: https://mypy.readthedocs.io/en/stable/config_file.html
+#
+# We use mypy as part of pre-commit checks
+
 [mypy]
 python_version = 3.9
-follow_imports = normal
-strict = False
+follow_imports = error
+strict = True
 no_incremental = True
+# This allows us to use pytest decorators, which are not typed yet
+disallow_untyped_decorators = False
+
+# These sections allow us to ignore mypy errors for packages
+# which are not (hopefully yet) statically typed
 
 [mypy-Cython.*]
 ignore_missing_imports = True
@@ -30,3 +44,6 @@ ignore_missing_imports = True
 
 [mypy-tensorflow.*]
 ignore_missing_imports = True
+
+[mypy-urllib3.*]
+ignore_missing_imports = True
diff --git a/tests/base-notebook/test_packages.py b/tests/base-notebook/test_packages.py
index 7109b6ae..1c085320 100644
--- a/tests/base-notebook/test_packages.py
+++ b/tests/base-notebook/test_packages.py
@@ -111,7 +111,9 @@ def r_package_predicate(package: str) -> bool:
     return not excluded_package_predicate(package) and package.startswith("r-")
 
 
-def _check_import_package(package_helper: CondaPackageHelper, command: list[str]):
+def _check_import_package(
+    package_helper: CondaPackageHelper, command: list[str]
+) -> None:
     """Generic function executing a command"""
     LOGGER.debug(f"Trying to import a package with [{command}] ...")
     exec_result = package_helper.running_container.exec_run(command)
@@ -120,12 +122,14 @@ def _check_import_package(package_helper: CondaPackageHelper, command: list[str]
     ), f"Import package failed, output: {exec_result.output}"
 
 
-def check_import_python_package(package_helper: CondaPackageHelper, package: str):
+def check_import_python_package(
+    package_helper: CondaPackageHelper, package: str
+) -> None:
     """Try to import a Python package from the command line"""
     _check_import_package(package_helper, ["python", "-c", f"import {package}"])
 
 
-def check_import_r_package(package_helper: CondaPackageHelper, package: str):
+def check_import_r_package(package_helper: CondaPackageHelper, package: str) -> None:
     """Try to import a R package from the command line"""
     _check_import_package(package_helper, ["R", "--slave", "-e", f"library({package})"])
 
diff --git a/tests/conftest.py b/tests/conftest.py
index adbada58..18d7435f 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -11,7 +11,7 @@ from docker.models.containers import Container
 import pytest  # type: ignore
 import requests
 
-from requests.packages.urllib3.util.retry import Retry
+from urllib3.util.retry import Retry
 from requests.adapters import HTTPAdapter
 
 
@@ -23,7 +23,7 @@ def find_free_port() -> str:
     with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
         s.bind(("", 0))
         s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        return s.getsockname()[1]
+        return s.getsockname()[1]  # type: ignore
 
 
 @pytest.fixture(scope="session")
diff --git a/tests/images_hierarchy.py b/tests/images_hierarchy.py
index 093883e2..744f9c2f 100644
--- a/tests/images_hierarchy.py
+++ b/tests/images_hierarchy.py
@@ -23,7 +23,7 @@ def get_test_dirs(
     short_image_name: Optional[str],
 ) -> list[Path]:
     if short_image_name is None:
-        return []  # type: ignore
+        return []
 
     test_dirs = get_test_dirs(ALL_IMAGES[short_image_name])
     if (current_image_tests_dir := THIS_DIR / short_image_name).exists():