diff --git a/scripts/generate_config_md.py b/scripts/generate_config_md.py
index 06213b09..0ea95077 100755
--- a/scripts/generate_config_md.py
+++ b/scripts/generate_config_md.py
@@ -6,6 +6,7 @@ import json
 import os
 import re
 import sys
+import tempfile
 import textwrap
 from pathlib import Path
 from typing import Any, Optional, Type, TypeVar, Union, get_args
@@ -524,4 +525,9 @@ def main():
         ConfigEOS._force_documentation_mode = False
 
 if __name__ == "__main__":
-    main()
+    # EOS creates a config file if it finds none. Let it do so in a temporary
+    # directory, not in the working directory (e.g. the repository root).
+    with tempfile.TemporaryDirectory(prefix="eos-docs-") as eos_dir:
+        os.environ["EOS_DIR"] = eos_dir
+        os.environ["EOS_CONFIG_DIR"] = eos_dir
+        main()
diff --git a/scripts/generate_openapi.py b/scripts/generate_openapi.py
index 00c6641a..50e79bc0 100755
--- a/scripts/generate_openapi.py
+++ b/scripts/generate_openapi.py
@@ -18,6 +18,7 @@ import argparse
 import json
 import os
 import sys
+import tempfile
 from pathlib import Path
 
 # Add the src directory to sys.path so import akkudoktoreos works in all cases
@@ -101,4 +102,9 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    # EOS creates a config file if it finds none. Let it do so in a temporary
+    # directory, not in the working directory (e.g. the repository root).
+    with tempfile.TemporaryDirectory(prefix="eos-docs-") as eos_dir:
+        os.environ["EOS_DIR"] = eos_dir
+        os.environ["EOS_CONFIG_DIR"] = eos_dir
+        main()
diff --git a/scripts/generate_openapi_md.py b/scripts/generate_openapi_md.py
index 61127d98..59e44812 100755
--- a/scripts/generate_openapi_md.py
+++ b/scripts/generate_openapi_md.py
@@ -5,6 +5,7 @@ import argparse
 import json
 import os
 import sys
+import tempfile
 from typing import TYPE_CHECKING
 
 import git
@@ -318,4 +319,9 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    # EOS creates a config file if it finds none. Let it do so in a temporary
+    # directory, not in the working directory (e.g. the repository root).
+    with tempfile.TemporaryDirectory(prefix="eos-docs-") as eos_dir:
+        os.environ["EOS_DIR"] = eos_dir
+        os.environ["EOS_CONFIG_DIR"] = eos_dir
+        main()
diff --git a/tests/conftest.py b/tests/conftest.py
index 897e812e..beee8cc7 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -211,7 +211,8 @@ def cfg_non_existent(request):
     # Before test
     from platformdirs import user_config_dir
 
-    user_dir = user_config_dir(ConfigEOS.APP_NAME)
+    # The same directory as ConfigEOS uses (app author matters on Windows).
+    user_dir = user_config_dir(ConfigEOS.APP_NAME, ConfigEOS.APP_AUTHOR)
     user_config_file = Path(user_dir).joinpath(ConfigEOS.CONFIG_FILE_NAME)
     cwd_config_file = Path.cwd().joinpath(ConfigEOS.CONFIG_FILE_NAME)
     assert not user_config_file.exists(), (
diff --git a/tests/test_docsphinx.py b/tests/test_docsphinx.py
index 01509ab6..589e2b26 100644
--- a/tests/test_docsphinx.py
+++ b/tests/test_docsphinx.py
@@ -138,6 +138,9 @@ class TestSphinxDocumentation:
         env = os.environ.copy()
         env["EOS_DIR"] = eos_dir
         env["EOS_CONFIG_DIR"] = eos_dir
+        # An empty config file, so EOS does not fall back to (and migrate) the
+        # user's own config file in the user config directory.
+        Path(eos_dir, "EOS.config.json").write_text("{}", encoding="utf-8")
 
         try:
             process = subprocess.run(
@@ -146,7 +149,10 @@ class TestSphinxDocumentation:
                 env=env,
                 stdout=subprocess.PIPE,
                 stderr=subprocess.PIPE,
-                text=True,
+                # Sphinx writes UTF-8; the platform default (e.g. cp1252 on
+                # Windows) cannot decode it.
+                encoding="utf-8",
+                errors="replace",
                 cwd=DIR_PROJECT_ROOT,          # use the existing constant
             )
             output = process.stdout + "\n" + process.stderr