diff --git a/Makefile b/Makefile
index 98d397b3..45cf68d4 100644
--- a/Makefile
+++ b/Makefile
@@ -6,33 +6,33 @@ export MOCK_SLURM := /tmp/mock_slurm_$$RANDOM
 export EVALUATION_SYSTEM_PLUGINS := $(EVALUATION_SYSTEM_PLUGINS):$(PWD)/src/evaluation_system/tests/mocks,dummy:$(PWD)/src/evaluation_system/tests/mocks,dummyfolder:/tmp/animator,animator
 export EVALUATION_SYSTEM_CONFIG_FILE := $(PWD)/compose/local-eval-system.conf
 export EVALUATION_SYSTEM_DRS_CONFIG_FILE := $(PWD)/compose/drs_config.toml
-PYTHON := $(shell which python)
+PYTHON3 := $(shell which python3)
 all: install test_coverage
 
 .PHONY: docs
 install:
-	python -m pip install .[test]
+	python3 -m pip install .[test]
 
 test:
-	python -m pytest -vv --nbval --current-env $(PWD)/src/evaluation_system/tests
+	python3 -m pytest -vv --nbval --current-env $(PWD)/src/evaluation_system/tests
 
 test_coverage:
-	python -m pytest -vv \
+	python3 -m pytest -vv \
 		--nbval --current-env --cov=$(PWD)/src --cov-report=html:coverage_report \
 	    --junitxml report.xml --current-env --cov-report xml \
 		$(PWD)/src/evaluation_system/tests
-	python -m coverage report
+	python3 -m coverage report
 
 prepdocs:
 	rm -rf /tmp/animator
-	python -m pip install -e .[docs]
+	python3 -m pip install -e .[docs]
 	git clone --recursive https://gitlab.dkrz.de/freva/plugins4freva/animator.git /tmp/animator
 	mkdir -p /tmp/animator/plugin_env/bin
-	ln -s $(PYTHON) /tmp/animator/plugin_env/bin/python
-	python -m ipykernel install --user --name freva \
+	ln -s $(PYTHON3) /tmp/animator/plugin_env/bin/python
+	python3 -m ipykernel install --user --name freva \
 		--env EVALUATION_SYSTEM_CONFIG_FILE $(EVALUATION_SYSTEM_CONFIG_FILE) \
 		--env EVALUATION_SYSTEM_PLUGINS $(EVALUATION_SYSTEM_PLUGINS)
-	python -m bash_kernel.install
+	python3 -m bash_kernel.install
 	make dummy-data
 	compose/animator_plugin_run.sh
 
@@ -42,8 +42,8 @@ docs:
 
 dummy-data:
 	compose/dummy_plugin_runs.sh
-	python compose/dummy_user_data.py
-	python compose/solr/ingest_dummy_data.py
+	python3 compose/dummy_user_data.py
+	python3 compose/solr/ingest_dummy_data.py
 
 lint:
 	mypy --install-types --non-interactive
diff --git a/src/evaluation_system/misc/__init__.py b/src/evaluation_system/misc/__init__.py
index baaaa184..1588029a 100644
--- a/src/evaluation_system/misc/__init__.py
+++ b/src/evaluation_system/misc/__init__.py
@@ -43,7 +43,7 @@ def set_level(self, level: Union[int, str]) -> None:
 logger.addHandler(logger_stream_handle)
 
 
-class _ConfigWrapper(str):
+class _ConfigWrapper:
     """Convenience class that helps to dynamically set the location of the
     evaluation system config file."""
 
@@ -55,8 +55,8 @@ def __init__(
     ):
         self.default_file = default_file
 
-    def __str__(self) -> str:
-        return os.environ.get(self._env, self.default_file)
-
     def __repr__(self) -> str:
         return self.__str__()
+
+    def __fspath__(self) -> str:
+        return os.environ.get(self._env, self.default_file)
diff --git a/src/evaluation_system/tests/plugin_command_test.py b/src/evaluation_system/tests/plugin_command_test.py
index 7f40723f..fe0fbb7e 100644
--- a/src/evaluation_system/tests/plugin_command_test.py
+++ b/src/evaluation_system/tests/plugin_command_test.py
@@ -132,18 +132,18 @@ def test_plugin_status(dummy_env, caplog) -> None:
 
     import freva
 
-    # res = freva.run_plugin("dummyplugin", the_number=2, other=-5, batchmode=True)
-    # # with pytest.raises(ValueError):
-    # # res.wait()
-    # # assert res.status == "running"
-    # res.kill()
-    # time.sleep(0.5)
-    # assert res.status == "broken"
-    # res.kill()
-    res = freva.run_plugin("dummyplugin", the_number=2, other=-1, batchmode=False)
+    res = freva.run_plugin("dummyplugin", the_number=2, other=-5, batchmode=True)
+    with pytest.raises(ValueError):
+        res.wait(2)
+    assert res.status == "running"
+    res.kill()
+    time.sleep(0.5)
+    assert res.status == "broken"
+    res.kill()
+    res = freva.run_plugin("dummyplugin", the_number=2, other=-1, batchmode=True)
     res.wait()
     assert res.status == "finished"
-    # assert isinstance(res.batch_id, int)
+    assert isinstance(res.batch_id, int)
 
 
 def test_plugin_output(dummy_history) -> None: