diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index b3a1d2aba..e13aa2fd0 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,20 +9,20 @@ repos:
     hooks:
       - id: mypy
         name: mypy openml
-        files: openml/*
+        files: openml/.*
       - id: mypy
         name: mypy tests
-        files: tests/*
+        files: tests/.*
   - repo: https://gitlab.com/pycqa/flake8
     rev: 3.8.3
     hooks:
       - id: flake8
         name: flake8 openml
-        files: openml/*
+        files: openml/.*
         additional_dependencies:
           - flake8-print==3.1.4
       - id: flake8
         name: flake8 tests
-        files: tests/*
+        files: tests/.*
         additional_dependencies:
           - flake8-print==3.1.4
diff --git a/doc/progress.rst b/doc/progress.rst
index 401550a4d..c31976301 100644
--- a/doc/progress.rst
+++ b/doc/progress.rst
@@ -8,10 +8,12 @@ Changelog
 
 0.13.0
 ~~~~~~
+ * FIX#1030: ``pre-commit`` hooks now no longer should issue a warning.
  * FIX#1110: Make arguments to ``create_study`` and ``create_suite`` that are defined as optional by the OpenML XSD actually optional.
  * MAIN#1088: Do CI for Windows on Github Actions instead of Appveyor.
 
 
+
 0.12.2
 ~~~~~~
 
diff --git a/openml/study/functions.py b/openml/study/functions.py
index 144c089b3..26cb9bd55 100644
--- a/openml/study/functions.py
+++ b/openml/study/functions.py
@@ -135,7 +135,7 @@ def get_nested_ids_from_result_dict(key: str, subkey: str) -> Optional[List]:
         )  # type: BaseStudy
 
     elif main_entity_type in ["tasks", "task"]:
-
+        tasks = cast("List[int]", tasks)
         study = OpenMLBenchmarkSuite(
             suite_id=study_id,
             alias=alias,