diff --git a/Makefile b/Makefile
deleted file mode 100644
index f0151315..00000000
--- a/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-.PHONY: epc_data_test_attributes
-
-epc_data_test_attributes:
-	pytest --cov-report term-missing --cov=epc_data/attributes
diff --git a/epc_data/attributes/WindowAttributes.py b/epc_data/attributes/WindowAttributes.py
index 19c71e77..88cc4538 100644
--- a/epc_data/attributes/WindowAttributes.py
+++ b/epc_data/attributes/WindowAttributes.py
@@ -1,4 +1,5 @@
 from typing import Dict, List, Union
+from epc_data.attributes.attribute_utils import clean_description
 
 
 class WindowAttributes:
@@ -7,7 +8,7 @@ class WindowAttributes:
     GLAZING_TYPES = ["double", "triple", "secondary", "multiple", "high performance"]
 
     def __init__(self, description: str):
-        self.description: str = self._clean_description(description.lower())
+        self.description: str = clean_description(description.lower())
 
         if not description or not any(
             rt in self.description for rt in
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 00000000..ed445f55
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,3 @@
+[pytest]
+addopts = --cov-report term-missing --cov=epc_data/attributes --cov=epc_data/app.py
+testpaths = epc_data/tests