diff --git a/edalize/templates/vunit/run.py.j2 b/edalize/templates/vunit/run.py.j2
index bd43e4f7b..2ccaf4bfd 100644
--- a/edalize/templates/vunit/run.py.j2
+++ b/edalize/templates/vunit/run.py.j2
@@ -1,17 +1,21 @@
 # Auto generated by Edalize
 
+
 def load_module_from_file(name, python_file):
     import importlib.util
+
     spec = importlib.util.spec_from_file_location(name, python_file)
     module = importlib.util.module_from_spec(spec)
     spec.loader.exec_module(module)
     return module
 
-def load_runner_hooks(python_file = r'{{ vunit_runner_path }}'):
+
+def load_runner_hooks(python_file=r"{{ vunit_runner_path }}"):
     if len(python_file) > 0:
-        return load_module_from_file('vunit_runner_hooks', python_file)
+        return load_module_from_file("vunit_runner_hooks", python_file)
     else:
-        return __import__('edalize.vunit_hooks', fromlist=['vunit_hooks'])
+        return __import__("edalize.vunit_hooks", fromlist=["vunit_hooks"])
+
 
 runner = load_runner_hooks().VUnitRunner()