diff --git a/.gitignore b/.gitignore
index cd9572c91..a666f452a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,10 +12,6 @@ __pycache__/
 venv/
 .venv/
 
-#
-.mutmut-cache
-mutmut-results.*
-
 # Code coverage artifacts
 .coverage*
 coverage.xml
diff --git a/Makefile b/Makefile
index 2807d2cda..b1159705a 100644
--- a/Makefile
+++ b/Makefile
@@ -23,13 +23,6 @@ test:
 testtype:
 	pytest tests --cov --cov-report term-missing -vv --cov-report html --durations=3 --timeout=30 --typeguard-packages=pypdf
 
-mutation-test:
-	mutmut run
-
-mutation-results:
-	mutmut junitxml --suspicious-policy=ignore --untested-policy=ignore > mutmut-results.xml
-	junit2html mutmut-results.xml mutmut-results.html
-
 benchmark:
 	pytest tests/bench.py
 
diff --git a/mutmut-test.sh b/mutmut-test.sh
deleted file mode 100755
index 9a8bb1d73..000000000
--- a/mutmut-test.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/bash -e
-pytest -x
-mypy pypdf --show-error-codes --disallow-untyped-defs --disallow-incomplete-defs --ignore-missing-imports
diff --git a/mutmut_config.py b/mutmut_config.py
deleted file mode 100644
index ae08b2338..000000000
--- a/mutmut_config.py
+++ /dev/null
@@ -1,25 +0,0 @@
-"""
-Configuration for mutmut.
-
-See https://mutmut.readthedocs.io/en/latest/
-"""
-
-from mutmut import Context
-
-
-def pre_mutation(context: Context) -> None:
-    """
-    Filter what to mutate.
-
-    Args:
-        context: A mutmut Context object
-
-    """
-    line = context.current_source_line.strip()
-    if (
-        "_codecs" in context.filename
-        or "pragma: no cover" in line
-        or "deprecate" in line
-        or line.startswith("logger")
-    ):
-        context.skip = True
diff --git a/pyproject.toml b/pyproject.toml
index e85630d7d..33cc4e1bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,16 +53,11 @@ image = ["Pillow>=8.0.0"]
 dev = ["black", "flit", "pip-tools", "pre-commit<2.18.0", "pytest-cov", "pytest-socket", "pytest-timeout", "pytest-xdist", "wheel"]
 docs = ["myst_parser", "sphinx", "sphinx_rtd_theme"]
 
-[tool.mutmut]
-backup = false
-runner = "./mutmut-test.sh"
-tests_dir = "tests/"
-
 [tool.check-wheel-contents]
 package = "./pypdf"
 
 [tool.flit.sdist]
-exclude = [".github/*", "docs/*", "sample-files/.github/*", "sample-files/.gitignore", "sample-files/.pre-commit-config.yaml",  "requirements/*", ".flake8", ".gitignore", ".gitmodules", ".pylintrc", "tox.ini", "make_release.py", "mutmut-test.sh", ".pre-commit-config.yaml", ".gitblame-ignore-revs", "Makefile", "mutmut_config.py"]
+exclude = [".github/*", "docs/*", "sample-files/.github/*", "sample-files/.gitignore", "sample-files/.pre-commit-config.yaml",  "requirements/*", ".flake8", ".gitignore", ".gitmodules", ".pylintrc", "tox.ini", "make_release.py", ".pre-commit-config.yaml", ".gitblame-ignore-revs", "Makefile"]
 include = ["resources/", "tests/"]
 
 [tool.pytest.ini_options]
diff --git a/setup.cfg b/setup.cfg
index 84859aa19..65a463b63 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,8 +1,3 @@
-[mutmut]
-backup = False
-runner = ./mutmut-test.sh
-tests_dir = tests/
-
 [tool:check-wheel-contents]
 package = ./pypdf