diff --git a/data/dictionary.xml b/data/dictionary.xml
index 2978abf..46012f2 100644
--- a/data/dictionary.xml
+++ b/data/dictionary.xml
@@ -32,6 +32,8 @@
       <w>rasterize</w>
       <w>rasterized</w>
       <w>röntgen</w>
+      <w>subattributes</w>
+      <w>subelement</w>
       <w>subparser</w>
       <w>svgwrite</w>
       <w>taginfo</w>
diff --git a/data/githooks/commit-msg b/data/githooks/commit-msg
index 8065e28..94f55b5 100755
--- a/data/githooks/commit-msg
+++ b/data/githooks/commit-msg
@@ -12,12 +12,6 @@ SHORT_MESSAGE_MAX_LENGTH: int = 50
 MESSAGE_MAX_LENGTH: int = 72
 
 
-def error(message: str):
-    """Print error message and return exit code 1."""
-    print(f"Error: {message}")
-    sys.exit(1)
-
-
 def check_file(file_name: str) -> Optional[str]:
     """
     Exit program with exit code 1 if commit message does not conform the rules.
diff --git a/map_machine/mapper.py b/map_machine/mapper.py
index 991d1c4..6b54638 100644
--- a/map_machine/mapper.py
+++ b/map_machine/mapper.py
@@ -146,14 +146,14 @@ class Map:
 
             previous_height = height
 
-    def draw_roads(self, roads: Iterator[Road]) -> None:
+    def draw_simple_roads(self, roads: Iterator[Road]) -> None:
         """Draw road as simple SVG path."""
         nodes: dict[OSMNode, set[RoadPart]] = {}
 
         for road in roads:
-            for index in range(len(road.outers[0]) - 1):
-                node_1: OSMNode = road.outers[0][index]
-                node_2: OSMNode = road.outers[0][index + 1]
+            for index in range(len(road.nodes) - 1):
+                node_1: OSMNode = road.nodes[index]
+                node_2: OSMNode = road.nodes[index + 1]
                 point_1: np.ndarray = self.flinger.fling(node_1.coordinates)
                 point_2: np.ndarray = self.flinger.fling(node_2.coordinates)
                 scale: float = self.flinger.get_scale(node_1.coordinates)
diff --git a/map_machine/road.py b/map_machine/road.py
index 7bbc2a8..fcc6fa9 100644
--- a/map_machine/road.py
+++ b/map_machine/road.py
@@ -464,6 +464,7 @@ class Road(Tagged):
         return style
 
     def get_filter(self, svg: Drawing, is_border: bool) -> Optional[Filter]:
+        """Get blurring filter."""
         if not USE_BLUR:
             return None
 
diff --git a/tests/test_requirements.py b/tests/test_requirements.py
index 8e1c5df..a2527fa 100644
--- a/tests/test_requirements.py
+++ b/tests/test_requirements.py
@@ -1,3 +1,6 @@
+"""
+Check whether `requirements.txt` contains all requirements from `setup.py`.
+"""
 from map_machine import REQUIREMENTS
 from pathlib import Path
 
diff --git a/tests/test_vector.py b/tests/test_vector.py
index 54548da..0b6a316 100644
--- a/tests/test_vector.py
+++ b/tests/test_vector.py
@@ -25,4 +25,6 @@ def test_compute_angle() -> None:
 
 def test_turn_by_compute_angle() -> None:
     """Test turing one angle by another."""
-    assert np.allclose(turn_by_angle((1, 0), np.pi / 2), np.array((0, 1)))
+    assert np.allclose(
+        turn_by_angle(np.array((1, 0)), np.pi / 2), np.array((0, 1))
+    )