diff --git a/unittests/test_parser.py b/unittests/test_parser.py
index 26fd4aa62952eb595de693a409485972fa6a78fa..a14cb1ab516e87eb64bc78deadc0481c8501a058 100644
--- a/unittests/test_parser.py
+++ b/unittests/test_parser.py
@@ -16,6 +16,8 @@ def to_file(string):
     return f.name
 
 # TODO: check purpose of this function... add documentation
+
+
 def parse_str(string):
     parse_model_from_yaml(to_file(string))
 
@@ -68,7 +70,8 @@ RT2:
         a:
 """
 
-        self.assertRaises(TwiceDefinedException, lambda: parse_model_from_yaml(to_file(string)))
+        self.assertRaises(TwiceDefinedException,
+                          lambda: parse_model_from_yaml(to_file(string)))
 
     def test_typical_case(self):
         string = """
@@ -103,7 +106,8 @@ RT5:
 - RT1:
 - RT2:
 """
-        self.assertRaises(ValueError, lambda: parse_model_from_yaml(to_file(string)))
+        self.assertRaises(
+            ValueError, lambda: parse_model_from_yaml(to_file(string)))
 
     def test_unknown_kwarg(self):
         string = """
@@ -111,7 +115,8 @@ RT1:
   datetime:
     p1:
 """
-        self.assertRaises(ValueError, lambda: parse_model_from_yaml(to_file(string)))
+        self.assertRaises(
+            ValueError, lambda: parse_model_from_yaml(to_file(string)))
 
     def test_definition_in_inheritance(self):
         string = """
@@ -121,7 +126,8 @@ RT2:
   - RT1:
     description: "tach"
 """
-        self.assertRaises(ValueError, lambda: parse_model_from_yaml(to_file(string)))
+        self.assertRaises(
+            ValueError, lambda: parse_model_from_yaml(to_file(string)))
 
     def test_inheritance(self):
         string = """
@@ -332,7 +338,6 @@ A:
             assert("line {}".format(line) in yde.exception.args[0])
 
 
-
 def test_define_role():
     model = """
 A:
@@ -387,7 +392,6 @@ b:
     assert entities["A"].get_property("b").value == 42
     assert entities["b"].value is None
 
-    
     model = """
 b:
   datatype: INTEGER