diff --git a/Makefile b/Makefile
index 2711313..9a8783b 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ help: ## Print help for each target
 		| sort | awk 'BEGIN {FS=":.* ## "}; {printf "%-25s %s\n", $$1, $$2};'
 
 clean: ## Cleanup
+	@rm -rf ./.env
 	@rm -f  ./*.pyc
 	@rm -rf ./__pycache__
 	@rm -f  $(SRC_CORE)/*.pyc
diff --git a/gpxtrackposter/calendar_drawer.py b/gpxtrackposter/calendar_drawer.py
index fe549df..a8a521d 100644
--- a/gpxtrackposter/calendar_drawer.py
+++ b/gpxtrackposter/calendar_drawer.py
@@ -1,4 +1,5 @@
 """Draw a calendar poster."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/circular_drawer.py b/gpxtrackposter/circular_drawer.py
index 46b394a..a61848b 100644
--- a/gpxtrackposter/circular_drawer.py
+++ b/gpxtrackposter/circular_drawer.py
@@ -1,4 +1,5 @@
 """Draw a circular Poster."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/exceptions.py b/gpxtrackposter/exceptions.py
index 7b2cad3..cb8fd53 100644
--- a/gpxtrackposter/exceptions.py
+++ b/gpxtrackposter/exceptions.py
@@ -1,4 +1,5 @@
 """Exceptions"""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/github_drawer.py b/gpxtrackposter/github_drawer.py
index 0f2916f..4cfc5ee 100644
--- a/gpxtrackposter/github_drawer.py
+++ b/gpxtrackposter/github_drawer.py
@@ -1,4 +1,5 @@
 """Draw a GitHub style poster."""
+
 # Copyright 2020-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/grid_drawer.py b/gpxtrackposter/grid_drawer.py
index f9e9ad2..6843dd9 100644
--- a/gpxtrackposter/grid_drawer.py
+++ b/gpxtrackposter/grid_drawer.py
@@ -1,4 +1,5 @@
 """Draw a grid poster."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/heatmap_drawer.py b/gpxtrackposter/heatmap_drawer.py
index 59ce156..fae3050 100644
--- a/gpxtrackposter/heatmap_drawer.py
+++ b/gpxtrackposter/heatmap_drawer.py
@@ -1,4 +1,5 @@
 """Draw a heatmap poster."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
@@ -7,11 +8,17 @@
 import argparse
 import logging
 import math
+import os
+import sys
+import uuid
+from operator import itemgetter
 from typing import Dict, List, Optional, Tuple
 
 import s2sphere  # type: ignore
+import staticmaps  # type: ignore
 import svgwrite  # type: ignore
 from geopy.distance import distance  # type: ignore
+from PIL import Image  # type: ignore
 
 from gpxtrackposter import utils
 from gpxtrackposter.exceptions import ParameterError, PosterError
@@ -38,6 +45,7 @@ class HeatmapDrawer(TracksDrawer):
         create_args: Create arguments for heatmap.
         fetch_args: Get arguments passed.
         draw: Draw the heatmap based on the Poster's tracks.
+        draw_background: Draw the heatmaps background image if requested.
     """
 
     def __init__(self, the_poster: Poster):
@@ -49,6 +57,11 @@ def __init__(self, the_poster: Poster):
         self._heatmap_line_width_lower: List[Tuple[float, float]] = [(0.10, 5.0), (0.20, 2.0), (1.0, 0.30)]
         self._heatmap_line_width_upper: List[Tuple[float, float]] = [(0.02, 0.5), (0.05, 0.2), (1.0, 0.05)]
         self._heatmap_line_width: Optional[List[Tuple[float, float]]] = None
+        self._heatmap_renderer: str = "pillow"
+        self._tile_provider: Optional[staticmaps.TileProvider] = None
+        self._tile_context: staticmaps.Context = staticmaps.Context()
+        self._bg_max_size: int = 1200
+        self._transformer: Optional[staticmaps.Transformer] = None
 
     def create_args(self, args_parser: argparse.ArgumentParser) -> None:
         """Add arguments to the parser
@@ -80,6 +93,36 @@ def create_args(self, args_parser: argparse.ArgumentParser) -> None:
             help="Define three transparency and width tuples for the heatmap lines or set it to "
             "`automatic` for automatic calculation (default: 0.1,5.0, 0.2,2.0, 1.0,0.3).",
         )
+        tile_provider = staticmaps.default_tile_providers.keys()
+        group.add_argument(
+            "--heatmap-tile-provider",
+            dest="heatmap_tile_provider",
+            metavar="TILE_PROVIDER",
+            type=str,
+            choices=tile_provider,
+            help="Optionally, choose a tile provider from the list for a background map image: "
+            f"{', '.join(tile_provider)}. (Default: None)",
+        )
+        group.add_argument(
+            "--heatmap-tile-max-size",
+            dest="heatmap_tile_max_size",
+            metavar="PIXEL",
+            type=int,
+            default=1200,
+            help="Set the maximum background image size (which is afterwards scaled to the poster size). "
+            "This setting defines how much details will be shown on the map. "
+            "Be sure to choose a reasonable value! (default: 1200 px)",
+        )
+        bg_renderer = ["pillow", "cairo"]
+        group.add_argument(
+            "--heatmap-tile-renderer",
+            dest="heatmap_renderer",
+            metavar="RENDERER",
+            choices=bg_renderer,
+            default=self._heatmap_renderer,
+            help=f"Choose a renderer for generating the background image, one of {', '.join(bg_renderer)}. "
+            f"(default: {self._heatmap_renderer})",
+        )
 
     def fetch_args(self, args: argparse.Namespace) -> None:
         """Get arguments that were passed, and also perform basic validation on them.
@@ -93,6 +136,23 @@ def fetch_args(self, args: argparse.Namespace) -> None:
         self._center = self.validate_heatmap_center(args.heatmap_center)
         self._radius = self.validate_heatmap_radius(args.heatmap_radius)
         self._heatmap_line_width = self.validate_heatmap_line_width(args.heatmap_line_width)
+        self._center = self.validate_heatmap_center(args.heatmap_center)
+        self._radius = self.validate_heatmap_radius(args.heatmap_radius)
+        self._heatmap_line_width = self.validate_heatmap_line_width(args.heatmap_line_width)
+
+        if args.heatmap_tile_provider:
+            self._tile_provider = args.heatmap_tile_provider
+        if args.heatmap_tile_max_size:
+            self._bg_max_size = args.heatmap_tile_max_size
+            if args.heatmap_tile_max_size > 4800:
+                msg = (
+                    f"A size of < {args.heatmap_tile_max_size} > pixels for the background image is very high.\n"
+                    "Fetching large tiles takes time and consumes much disk space.\n"
+                    "Consider choosing a smaller size!"
+                )
+                log.warning(msg)
+        # set background image renderer
+        self._heatmap_renderer = args.heatmap_renderer
 
     def get_line_transparencies_and_widths(self, bbox: s2sphere.sphere.LatLngRect) -> List[Tuple[float, float]]:
         """Get a list of tuples of line widths and transparencies
@@ -174,6 +234,7 @@ def draw(self, dr: svgwrite.Drawing, g: svgwrite.container.Group, size: XY, offs
         if len(self.poster.tracks) == 0:
             raise PosterError("No tracks to draw.")
         bbox = self._determine_bbox()
+        size, offset = self._get_tracks_size_offset(bbox, size, offset)
         line_transparencies_and_widths = self.get_line_transparencies_and_widths(bbox)
         year_groups: Dict[int, svgwrite.container.Group] = {}
         for tr in self.poster.tracks:
@@ -281,3 +342,115 @@ def validate_heatmap_line_width(
                     raise ParameterError(f"Not three valid TRANSPARENCY,WIDTH pairs: {heatmap_line_width}") from e
             return self._heatmap_line_width
         return None
+
+    def draw_background(self, dr: svgwrite.Drawing, g: svgwrite.container.Group, size: XY, offset: XY) -> None:
+        """Draw background with background static map if requested
+
+        Args:
+            dr: svg drawing
+            g: svg group
+            size: Size
+            offset: Offset
+        """
+        super().draw_background(dr, g, size, offset)
+        if not self._tile_provider:
+            return
+
+        # retrieve static map
+        bbox = self._determine_bbox()
+        self._tile_context.set_tile_provider(staticmaps.default_tile_providers[self._tile_provider])
+        self._tile_context.set_center(bbox.get_center())
+        # remove padding from poster size to retrieve background image size
+        size = size - XY(
+            self.poster.padding["l"] + self.poster.padding["r"], self.poster.padding["t"] + self.poster.padding["b"]
+        )
+        offset = offset + XY(self.poster.padding["l"], self.poster.padding["t"])
+        bg_size = size.scale_to_max_value(self._bg_max_size).round()
+
+        # get maximum track line width, scale and add to background image boundary
+        scale = max([bg_size.x / size.x, bg_size.y / size.y])
+        self._heatmap_line_width = self.get_line_transparencies_and_widths(bbox)
+        half_stroke = round(scale * (max(self._heatmap_line_width, key=itemgetter(1))[1] / 2))
+        bbox_corner_list = [bbox.get_vertex(0), bbox.get_vertex(1), bbox.get_vertex(2), bbox.get_vertex(3)]
+        bounds = staticmaps.Bounds(bbox_corner_list, half_stroke)
+        self._tile_context.add_object(bounds)
+        # tighten the background map to bounds
+        self._tile_context.set_tighten_to_bounds(True)
+
+        # set transformer with center and zoom
+        center, zoom = self._tile_context.determine_center_zoom(bg_size.x, bg_size.y)
+        self._transformer = staticmaps.Transformer(
+            bg_size.x,
+            bg_size.y,
+            zoom,
+            center,
+            staticmaps.default_tile_providers[self._tile_provider].tile_size(),
+        )
+
+        # TODOX: remove testing code
+        from staticmaps.color import BLACK, RED  # type: ignore
+
+        self._tile_context.add_object(staticmaps.Line([bbox.lo(), bbox.hi()], RED, 1))
+        self._tile_context.add_object(
+            staticmaps.Line(
+                [
+                    s2sphere.LatLng.from_angles(bbox.lat_lo(), bbox.lng_lo()),
+                    s2sphere.LatLng.from_angles(bbox.lat_lo(), bbox.lng_hi()),
+                    s2sphere.LatLng.from_angles(bbox.lat_hi(), bbox.lng_hi()),
+                    s2sphere.LatLng.from_angles(bbox.lat_hi(), bbox.lng_lo()),
+                    s2sphere.LatLng.from_angles(bbox.lat_lo(), bbox.lng_lo()),
+                ],
+                BLACK,
+                1,
+            )
+        )
+
+        try:
+            # generate a unique filename
+            tmp_file = f"{uuid.uuid4()}.png"
+
+            # render background image based on command line argument
+            if self._heatmap_renderer == "cairo":
+                try:
+                    __import__("cairo")
+                except ImportError:
+                    msg = (
+                        "The cairo module cannot be imported. "
+                        "Please consider choosing 'pillow' as background image renderer instead!"
+                    )
+                    sys.exit(msg)
+                image = self._tile_context.render_cairo(bg_size.x, bg_size.y)
+                image.write_to_png(tmp_file)
+            else:
+                image = self._tile_context.render_pillow(bg_size.x, bg_size.y)
+                image.save(tmp_file)
+            with open(tmp_file, "rb") as f:
+                img_inl = staticmaps.SvgRenderer.create_inline_image(f.read())
+                dr.add(dr.image(img_inl, insert=(offset.x, offset.y), size=(size.x, size.y)))
+            os.remove(tmp_file)
+        except (Image.DecompressionBombError, FileNotFoundError):
+            print("Something went wrong generating the background image!")
+
+    def _get_tracks_size_offset(self, bbox: s2sphere.LatLngRect, size: XY, offset: XY) -> Tuple[XY, XY]:
+        if not self._tile_provider:
+            return size, offset
+
+        # background image size
+        bg_size = size.scale_to_max_value(self._bg_max_size)
+        tracks_scale = size / bg_size
+
+        transformer = self._transformer
+        assert transformer is not None
+        tracks_width = math.fabs(transformer.ll2pixel(bbox.hi())[0] - transformer.ll2pixel(bbox.lo())[0])
+        tracks_height = math.fabs(transformer.ll2pixel(bbox.hi())[1] - transformer.ll2pixel(bbox.lo())[1])
+        # add maximum track line width
+        assert self._heatmap_line_width
+        max_stroke = max(self._heatmap_line_width, key=itemgetter(1))[1]
+        half_stroke = max_stroke / 2
+        tracks_size = XY(tracks_width, tracks_height) + max_stroke
+        tracks_size_scaled = tracks_scale * tracks_size
+        tracks_offset = offset + tracks_scale * (
+            XY(math.fabs(transformer.ll2pixel(bbox.lo())[0]), math.fabs(transformer.ll2pixel(bbox.hi())[1]))
+            - half_stroke
+        )
+        return tracks_size_scaled, tracks_offset
diff --git a/gpxtrackposter/localization.py b/gpxtrackposter/localization.py
index ce8125d..098fafe 100644
--- a/gpxtrackposter/localization.py
+++ b/gpxtrackposter/localization.py
@@ -1,4 +1,5 @@
 """Localization helpers."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/poster.py b/gpxtrackposter/poster.py
index 9f6fcdf..5063f2b 100644
--- a/gpxtrackposter/poster.py
+++ b/gpxtrackposter/poster.py
@@ -1,4 +1,5 @@
 """Create a poster from track data."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
@@ -76,6 +77,7 @@ def __init__(self) -> None:
         self.special_distance: Dict[str, float] = {"special_distance1": 10, "special_distance2": 20}
         self.width: int = 200
         self.height: int = 300
+        self.padding: Dict[str, int] = {"l": 10, "t": 30, "r": 10, "b": 30}
         self.years: YearRange = YearRange()
         self.tracks_drawer: Optional["TracksDrawer"] = None
         self._trans: Optional[Callable[[str], str]] = None
@@ -220,9 +222,14 @@ def draw(self, drawer: "TracksDrawer", output: str) -> None:
         d = svgwrite.Drawing(output, (f"{self.width}mm", f"{self.height}mm"))
         d.viewbox(width=self.width, height=self.height)
         d.add(d.rect((0, 0), (self.width, self.height), fill=self.colors["background"]))
+        self._draw_background(d, XY(self.width, self.height), XY(0.0, 0.0))
         self._draw_header(d)
         self._draw_footer(d)
-        self._draw_tracks(d, XY(self.width - 20, self.height - 30 - 30), XY(10, 30))
+        self._draw_tracks(
+            d,
+            XY(self.width - self.padding["l"] - self.padding["r"], self.height - self.padding["t"] - self.padding["b"]),
+            XY(self.padding["l"], self.padding["t"]),
+        )
         d.save()
 
     def m2u(self, m: pint.Quantity) -> float:
@@ -267,6 +274,14 @@ def _draw_tracks(self, d: svgwrite.Drawing, size: XY, offset: XY) -> None:
 
         self.tracks_drawer.draw(d, g, size, offset)
 
+    def _draw_background(self, d: svgwrite.Drawing, size: XY, offset: XY) -> None:
+        assert self.tracks_drawer
+
+        g = d.g(id="background")
+        d.add(g)
+
+        self.tracks_drawer.draw_background(d, g, size, offset)
+
     def _draw_header(self, d: svgwrite.Drawing) -> None:
         g = d.g(id="header")
         d.add(g)
diff --git a/gpxtrackposter/quantity_range.py b/gpxtrackposter/quantity_range.py
index 5b6fe4f..762c053 100644
--- a/gpxtrackposter/quantity_range.py
+++ b/gpxtrackposter/quantity_range.py
@@ -1,4 +1,5 @@
 """Represent a range of pint quantities"""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/timezone_adjuster.py b/gpxtrackposter/timezone_adjuster.py
index e75101b..00057c1 100644
--- a/gpxtrackposter/timezone_adjuster.py
+++ b/gpxtrackposter/timezone_adjuster.py
@@ -1,4 +1,5 @@
 """TimezoneAdjuster"""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/track.py b/gpxtrackposter/track.py
index de08780..fa13a33 100644
--- a/gpxtrackposter/track.py
+++ b/gpxtrackposter/track.py
@@ -1,4 +1,5 @@
 """Create and maintain info about a given activity track (corresponding to one GPX file)."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/tracks_drawer.py b/gpxtrackposter/tracks_drawer.py
index 145e9f8..160a1bf 100644
--- a/gpxtrackposter/tracks_drawer.py
+++ b/gpxtrackposter/tracks_drawer.py
@@ -1,4 +1,5 @@
 """Contains the base class TracksDrawer, which other Drawers inherit from."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
@@ -36,6 +37,17 @@ def fetch_args(self, args: argparse.Namespace) -> None:
 
         """
 
+    def draw_background(self, dr: svgwrite.Drawing, g: svgwrite.container.Group, size: XY, offset: XY) -> None:
+        """Draw background for all poster types - rectangle with 'background' color
+
+        Args:
+            dr: svg drawing
+            g: svg group
+            size: Size
+            offset: Offset
+        """
+        g.add(dr.rect((offset.x, offset.y), (size.x, size.y), fill=self.poster.colors["background"]))
+
     def draw(self, dr: svgwrite.Drawing, g: svgwrite.container.Group, size: XY, offset: XY) -> None:
         """Draw the circular Poster using distances broken down by time.
 
diff --git a/gpxtrackposter/units.py b/gpxtrackposter/units.py
index e8628c7..b184aaa 100644
--- a/gpxtrackposter/units.py
+++ b/gpxtrackposter/units.py
@@ -1,4 +1,5 @@
 """Units"""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/utils.py b/gpxtrackposter/utils.py
index e6269e8..713ab10 100644
--- a/gpxtrackposter/utils.py
+++ b/gpxtrackposter/utils.py
@@ -1,4 +1,5 @@
 """Assorted utility methods for use in creating posters."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/value_range.py b/gpxtrackposter/value_range.py
index f82df7a..79352c7 100644
--- a/gpxtrackposter/value_range.py
+++ b/gpxtrackposter/value_range.py
@@ -1,4 +1,5 @@
 """Represent a range of numerical values"""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/xy.py b/gpxtrackposter/xy.py
index bb09670..af00100 100644
--- a/gpxtrackposter/xy.py
+++ b/gpxtrackposter/xy.py
@@ -1,4 +1,5 @@
 """Represent x,y values with properly overloaded operations."""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/gpxtrackposter/year_range.py b/gpxtrackposter/year_range.py
index 1637825..e283012 100644
--- a/gpxtrackposter/year_range.py
+++ b/gpxtrackposter/year_range.py
@@ -1,4 +1,5 @@
 """Represent a range of years, with ability to update based on a track"""
+
 # Copyright 2016-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
@@ -123,5 +124,4 @@ def iter(self) -> Generator[int, None, None]:
             return
 
         assert self.to_year is not None
-        for year in range(self.from_year, self.to_year + 1):
-            yield year
+        yield from range(self.from_year, self.to_year + 1)
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 559b37b..afb2307 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -32,3 +32,4 @@ Pygments
 python-dateutil
 types-python-dateutil
 types-pytz
+types-setuptools
diff --git a/setup.py b/setup.py
index 55bd102..246d8c2 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,11 @@ def _read_reqs(relpath: str) -> list:
     """Read requirements"""
     fullpath = os.path.join(os.path.dirname(__file__), relpath)
     with open(fullpath, encoding="utf-8") as f:
-        return [s.strip() for s in f.readlines() if (s.strip() and not s.startswith("#") and not s.startswith("--"))]
+        return [
+            s.strip()
+            for s in f.readlines()
+            if (s.strip() and not s.startswith("#") and not s.startswith("--") and not s.startswith("git+https"))
+        ]
 
 
 setuptools.setup(
diff --git a/tests/conftest.py b/tests/conftest.py
index 6629c6c..1e9210f 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,7 @@
 """
 ConfTest
 """
+
 # Copyright 2022-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_calendar_drawer.py b/tests/test_calendar_drawer.py
index 0a24bdd..c2ca5ab 100644
--- a/tests/test_calendar_drawer.py
+++ b/tests/test_calendar_drawer.py
@@ -1,6 +1,7 @@
 """
 Several tests for CalendarDrawer
 """
+
 # Copyright 2022-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_circular_drawer.py b/tests/test_circular_drawer.py
index 91d15be..fd453c4 100644
--- a/tests/test_circular_drawer.py
+++ b/tests/test_circular_drawer.py
@@ -1,6 +1,7 @@
 """
 Several tests for CircularDrawer
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_cli.py b/tests/test_cli.py
index d5be56b..fa90fd6 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,6 +1,7 @@
 """
 Several tests for entry point cli.py
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_github_drawer.py b/tests/test_github_drawer.py
index db66837..306ce45 100644
--- a/tests/test_github_drawer.py
+++ b/tests/test_github_drawer.py
@@ -1,6 +1,7 @@
 """
 Several tests for GithubDrawer
 """
+
 # Copyright 2022-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_grid_drawer.py b/tests/test_grid_drawer.py
index fab9bd4..879b628 100644
--- a/tests/test_grid_drawer.py
+++ b/tests/test_grid_drawer.py
@@ -1,6 +1,7 @@
 """
 Several tests for GridDrawer
 """
+
 # Copyright 2022-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_heatmap_drawer.py b/tests/test_heatmap_drawer.py
index 416440d..0e2bb65 100644
--- a/tests/test_heatmap_drawer.py
+++ b/tests/test_heatmap_drawer.py
@@ -1,6 +1,7 @@
 """
 Several tests for HeatmapDrawer
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_localization.py b/tests/test_localization.py
index 9504247..5afb502 100644
--- a/tests/test_localization.py
+++ b/tests/test_localization.py
@@ -1,6 +1,7 @@
 """
 Several tests for Localization
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_quantity_range.py b/tests/test_quantity_range.py
index d2a1296..c539ca7 100644
--- a/tests/test_quantity_range.py
+++ b/tests/test_quantity_range.py
@@ -1,6 +1,7 @@
 """
 Several tests for QuantityRange
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_timezone_adjuster.py b/tests/test_timezone_adjuster.py
index 7f1e1ec..06c606a 100644
--- a/tests/test_timezone_adjuster.py
+++ b/tests/test_timezone_adjuster.py
@@ -1,6 +1,7 @@
 """
 Several tests for TimezoneAdjuster
 """
+
 # Copyright 2020-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_track.py b/tests/test_track.py
index 393b35f..917d522 100644
--- a/tests/test_track.py
+++ b/tests/test_track.py
@@ -1,6 +1,7 @@
 """
 Several tests for Track
 """
+
 # Copyright 2022-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_track_loader.py b/tests/test_track_loader.py
index 9cc277f..fe99076 100644
--- a/tests/test_track_loader.py
+++ b/tests/test_track_loader.py
@@ -1,6 +1,7 @@
 """
 Several tests for TrackLoader
 """
+
 # Copyright 2020-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_utils.py b/tests/test_utils.py
index b8b89f6..1c6b857 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,6 +1,7 @@
 """
 Several tests for utils
 """
+
 # Copyright 2018-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_value_range.py b/tests/test_value_range.py
index 35074f2..5a43fcc 100644
--- a/tests/test_value_range.py
+++ b/tests/test_value_range.py
@@ -1,6 +1,7 @@
 """
 Several tests for ValueRange
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_xy.py b/tests/test_xy.py
index 0b99b5d..2e7d3b5 100644
--- a/tests/test_xy.py
+++ b/tests/test_xy.py
@@ -1,6 +1,7 @@
 """
 Several tests for XY
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style
diff --git a/tests/test_year_range.py b/tests/test_year_range.py
index 17c604d..0744e48 100644
--- a/tests/test_year_range.py
+++ b/tests/test_year_range.py
@@ -1,6 +1,7 @@
 """
 Several tests for YearRange
 """
+
 # Copyright 2021-2023 Florian Pigorsch & Contributors. All rights reserved.
 #
 # Use of this source code is governed by a MIT-style