diff --git a/.github/ISSUE_TEMPLATE/enhancement.md b/.github/ISSUE_TEMPLATE/enhancement.md
index 0f1975d..2d094f4 100644
--- a/.github/ISSUE_TEMPLATE/enhancement.md
+++ b/.github/ISSUE_TEMPLATE/enhancement.md
@@ -8,7 +8,7 @@ ______________________________________________________________________
 #### Is your feature request related to a problem?
 
 Provide a description of what the problem is, e.g. "I wish I could use pytask-r to do
-\[...\]".
+[...]".
 
 #### Describe the solution you'd like
 
diff --git a/src/pytask_r/serialization.py b/src/pytask_r/serialization.py
index 908725d..b444eea 100644
--- a/src/pytask_r/serialization.py
+++ b/src/pytask_r/serialization.py
@@ -11,7 +11,7 @@
 from pytask import PTask
 from pytask import PTaskWithPath
 
-__all__ = ["create_path_to_serialized", "serialize_keyword_arguments", "SERIALIZERS"]
+__all__ = ["SERIALIZERS", "create_path_to_serialized", "serialize_keyword_arguments"]
 
 _HIDDEN_FOLDER = ".pytask/pytask-r"
 
diff --git a/tests/conftest.py b/tests/conftest.py
index c8d16f2..8420099 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -92,6 +92,6 @@ def invoke(self, *args, **kwargs):
             return super().invoke(*args, **kwargs)
 
 
-@pytest.fixture()
+@pytest.fixture
 def runner():
     return CustomCliRunner()
diff --git a/tests/test_collect.py b/tests/test_collect.py
index 9d79377..5110f56 100644
--- a/tests/test_collect.py
+++ b/tests/test_collect.py
@@ -4,12 +4,13 @@
 
 import pytest
 from pytask import Mark
+
 from pytask_r.collect import _parse_r_mark
 from pytask_r.collect import r
 from pytask_r.serialization import SERIALIZERS
 
 
-@pytest.mark.unit()
+@pytest.mark.unit
 @pytest.mark.parametrize(
     ("args", "kwargs", "expectation", "expected"),
     [
@@ -43,7 +44,7 @@ def test_r(args, kwargs, expectation, expected):
         assert result == expected
 
 
-@pytest.mark.unit()
+@pytest.mark.unit
 @pytest.mark.parametrize(
     (
         "mark",
diff --git a/tests/test_config.py b/tests/test_config.py
index e4c224d..3afc1dc 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -4,7 +4,7 @@
 from pytask import build
 
 
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 def test_marker_is_configured(tmp_path):
     session = build(paths=tmp_path)
     assert "r" in session.config["markers"]
diff --git a/tests/test_execute.py b/tests/test_execute.py
index f2ad26c..b6cf786 100644
--- a/tests/test_execute.py
+++ b/tests/test_execute.py
@@ -9,13 +9,13 @@
 from pytask import Task
 from pytask import build
 from pytask import cli
-from pytask_r.execute import pytask_execute_task_setup
 
+from pytask_r.execute import pytask_execute_task_setup
 from tests.conftest import needs_rscript
 from tests.conftest import parametrize_parse_code_serializer_suffix
 
 
-@pytest.mark.unit()
+@pytest.mark.unit
 def test_pytask_execute_task_setup(monkeypatch):
     """Make sure that the task setup raises errors."""
     # Act like r is installed since we do not test this.
@@ -33,7 +33,7 @@ def test_pytask_execute_task_setup(monkeypatch):
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 @pytest.mark.parametrize("depends_on", ["'in_1.txt'", "['in_1.txt', 'in_2.txt']"])
 def test_run_r_script(  # noqa: PLR0913
@@ -70,7 +70,7 @@ def task_run_r_script(produces = Path("out.txt")): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_run_r_script_w_task_decorator(
     runner, tmp_path, parse_config_code, serializer, suffix
@@ -100,7 +100,7 @@ def run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_raise_error_if_rscript_is_not_found(
     tmp_path, monkeypatch, parse_config_code, serializer, suffix
@@ -132,7 +132,7 @@ def task_run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_run_r_script_w_saving_workspace(
     runner, tmp_path, parse_config_code, serializer, suffix
@@ -167,7 +167,7 @@ def task_run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_run_r_script_w_wrong_cmd_option(
     runner, tmp_path, parse_config_code, serializer, suffix
@@ -202,7 +202,7 @@ def task_run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 def test_run_r_script_w_custom_serializer(runner, tmp_path):
     task_source = """
     import pytask
@@ -232,7 +232,7 @@ def task_run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 def test_run_r_script_fails_w_multiple_markers(runner, tmp_path):
     task_source = """
     import pytask
@@ -252,7 +252,7 @@ def task_run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 def test_run_r_script_with_capital_extension(runner, tmp_path):
     task_source = """
     import pytask
@@ -280,7 +280,7 @@ def task_run_r_script(): ...
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_run_r_script_w_nested_inputs(
     runner, tmp_path, parse_config_code, serializer, suffix
diff --git a/tests/test_normal_execution_w_plugin.py b/tests/test_normal_execution_w_plugin.py
index d14f598..dd5a773 100644
--- a/tests/test_normal_execution_w_plugin.py
+++ b/tests/test_normal_execution_w_plugin.py
@@ -9,7 +9,7 @@
 from pytask import cli
 
 
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @pytest.mark.parametrize(
     "dependencies",
     [(), ("in.txt",), ("in_1.txt", "in_2.txt")],
diff --git a/tests/test_parallel.py b/tests/test_parallel.py
index a6754a4..1a2f612 100644
--- a/tests/test_parallel.py
+++ b/tests/test_parallel.py
@@ -25,7 +25,7 @@
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_parallel_parametrization_over_source_files_w_loop(
     runner, tmp_path, parse_config_code, serializer, suffix
@@ -69,7 +69,7 @@ def task_execute_r_script():
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_parallel_parametrization_over_source_file_w_loop(
     runner, tmp_path, parse_config_code, serializer, suffix
@@ -106,7 +106,7 @@ def execute_r_script():
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 @pytest.mark.xfail(reason="@task does not support partialed functions.")
 def test_parallel_parametrization_over_source_file_w_loop_and_lambda(
diff --git a/tests/test_parametrize.py b/tests/test_parametrize.py
index 6e9cb94..8f15217 100644
--- a/tests/test_parametrize.py
+++ b/tests/test_parametrize.py
@@ -11,7 +11,7 @@
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_parametrized_execution_of_r_script_w_loop(
     runner, tmp_path, parse_config_code, serializer, suffix
@@ -53,7 +53,7 @@ def task_run_r_script():
 
 
 @needs_rscript
-@pytest.mark.end_to_end()
+@pytest.mark.end_to_end
 @parametrize_parse_code_serializer_suffix
 def test_parametrize_r_options_and_product_paths_w_loop(
     runner, tmp_path, parse_config_code, serializer, suffix