diff --git a/tests/copy-button/conf.py b/tests/copy-button/conf.py
index a159f3b..b609c9d 100644
--- a/tests/copy-button/conf.py
+++ b/tests/copy-button/conf.py
@@ -1,11 +1,11 @@
 from sphinx.application import Sphinx
 
-project = 'copy-button'
-copyright = '2024, Adrian Vollmer'
-author = 'Adrian Vollmer'
-version = '0.0.1'
+project = "copy-button"
+copyright = "2024, Adrian Vollmer"
+author = "Adrian Vollmer"
+version = "0.0.1"
 
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 extensions = [
     "sphinx_copybutton",
diff --git a/tests/demo001/conf.py b/tests/demo001/conf.py
index 54a2553..6945ecf 100644
--- a/tests/demo001/conf.py
+++ b/tests/demo001/conf.py
@@ -1,4 +1,5 @@
 from sphinx.application import Sphinx
+
 # Configuration file for the Sphinx documentation builder.
 #
 # For the full list of built-in configuration values, see the documentation:
@@ -7,16 +8,16 @@ from sphinx.application import Sphinx
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
-project = 'demo001'
-copyright = '2022, Adrian Vollmer'
-author = 'Adrian Vollmer'
-version = '0.0.1'
+project = "demo001"
+copyright = "2022, Adrian Vollmer"
+author = "Adrian Vollmer"
+version = "0.0.1"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-templates_path = ['_templates']
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+templates_path = ["_templates"]
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
diff --git a/tests/demo002/conf.py b/tests/demo002/conf.py
index 534ec53..3215f8c 100644
--- a/tests/demo002/conf.py
+++ b/tests/demo002/conf.py
@@ -6,22 +6,21 @@
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
-project = 'demo002'
-copyright = '2023, Adrian Vollmer'
-author = 'Adrian Vollmer'
+project = "demo002"
+copyright = "2023, Adrian Vollmer"
+author = "Adrian Vollmer"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
 extensions = []
 
-templates_path = ['_templates']
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
-
+templates_path = ["_templates"]
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
-html_theme = 'alabaster'
-html_static_path = ['_static']
+html_theme = "alabaster"
+html_static_path = ["_static"]
diff --git a/tests/mermaid/conf.py b/tests/mermaid/conf.py
index e0aa7b6..00ef70d 100644
--- a/tests/mermaid/conf.py
+++ b/tests/mermaid/conf.py
@@ -1,12 +1,10 @@
 from sphinx.application import Sphinx
 
-project = 'mermaid'
-copyright = '2024, Adrian Vollmer'
-author = 'Adrian Vollmer'
-version = '0.0.1'
+project = "mermaid"
+copyright = "2024, Adrian Vollmer"
+author = "Adrian Vollmer"
+version = "0.0.1"
 
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
-extensions = [
-    'sphinxcontrib.mermaid'
-]
+extensions = ["sphinxcontrib.mermaid"]
diff --git a/tests/multi-page/conf.py b/tests/multi-page/conf.py
index 0b32a6b..fe8e610 100644
--- a/tests/multi-page/conf.py
+++ b/tests/multi-page/conf.py
@@ -1,8 +1,8 @@
 from sphinx.application import Sphinx
 
-project = 'multi-page'
-copyright = '2024, Adrian Vollmer'
-author = 'Adrian Vollmer'
-version = '0.0.1'
+project = "multi-page"
+copyright = "2024, Adrian Vollmer"
+author = "Adrian Vollmer"
+version = "0.0.1"
 
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
diff --git a/tests/test_zundler.py b/tests/test_zundler.py
index c4b1e6a..b7120a7 100644
--- a/tests/test_zundler.py
+++ b/tests/test_zundler.py
@@ -63,7 +63,9 @@ def test_multi_page(selenium):
 
     selenium.switch_to.frame("main")
 
-    second_link = selenium.find_element(By.XPATH, "//a[text() = 'Second' and @class = 'reference internal']")
+    second_link = selenium.find_element(
+        By.XPATH, "//a[text() = 'Second' and @class = 'reference internal']"
+    )
 
     second_link.click()