diff --git a/pyproject.toml b/pyproject.toml
index 76645abbefe..08479b7b6fc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -287,9 +287,7 @@ module = [
     "tests.test_util.test_util_matching",
     "tests.test_util.test_util_uri",
     # tests/test_writers
-    "tests.test_writers.test_api_translator",
     "tests.test_writers.test_docutilsconf",
-    "tests.test_writers.test_writer_latex",
 ]
 disallow_untyped_defs = false
 
diff --git a/tests/test_writers/test_api_translator.py b/tests/test_writers/test_api_translator.py
index cd34aba058a..802ef47530a 100644
--- a/tests/test_writers/test_api_translator.py
+++ b/tests/test_writers/test_api_translator.py
@@ -3,12 +3,19 @@
 from __future__ import annotations
 
 import sys
+from typing import TYPE_CHECKING
 
 import pytest
 
+if TYPE_CHECKING:
+    from collections.abc import Iterator
+    from pathlib import Path
+
+    from sphinx.testing.util import SphinxTestApp
+
 
 @pytest.fixture(scope='module', autouse=True)
-def _setup_module(rootdir):
+def _setup_module(rootdir: Path) -> Iterator[None]:
     saved_path = sys.path.copy()
     sys.path.insert(0, str(rootdir / 'test-api-set-translator'))
     yield
@@ -16,7 +23,7 @@ def _setup_module(rootdir):
 
 
 @pytest.mark.sphinx('html', testroot='root')
-def test_html_translator(app):
+def test_html_translator(app: SphinxTestApp) -> None:
     # no set_translator()
     translator_class = app.builder.get_translator_class()
     assert translator_class
@@ -24,7 +31,7 @@ def test_html_translator(app):
 
 
 @pytest.mark.sphinx('html', testroot='api-set-translator')
-def test_html_with_set_translator_for_html_(app):
+def test_html_with_set_translator_for_html_(app: SphinxTestApp) -> None:
     # use set_translator()
     translator_class = app.builder.get_translator_class()
     assert translator_class
@@ -32,63 +39,63 @@ def test_html_with_set_translator_for_html_(app):
 
 
 @pytest.mark.sphinx('singlehtml', testroot='api-set-translator')
-def test_singlehtml_set_translator_for_singlehtml(app):
+def test_singlehtml_set_translator_for_singlehtml(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfSingleHTMLTranslator'
 
 
 @pytest.mark.sphinx('pickle', testroot='api-set-translator')
-def test_pickle_set_translator_for_pickle(app):
+def test_pickle_set_translator_for_pickle(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfPickleTranslator'
 
 
 @pytest.mark.sphinx('json', testroot='api-set-translator')
-def test_json_set_translator_for_json(app):
+def test_json_set_translator_for_json(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfJsonTranslator'
 
 
 @pytest.mark.sphinx('latex', testroot='api-set-translator')
-def test_html_with_set_translator_for_latex(app):
+def test_html_with_set_translator_for_latex(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfLaTeXTranslator'
 
 
 @pytest.mark.sphinx('man', testroot='api-set-translator')
-def test_html_with_set_translator_for_man(app):
+def test_html_with_set_translator_for_man(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfManualPageTranslator'
 
 
 @pytest.mark.sphinx('texinfo', testroot='api-set-translator')
-def test_html_with_set_translator_for_texinfo(app):
+def test_html_with_set_translator_for_texinfo(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfTexinfoTranslator'
 
 
 @pytest.mark.sphinx('text', testroot='api-set-translator')
-def test_html_with_set_translator_for_text(app):
+def test_html_with_set_translator_for_text(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfTextTranslator'
 
 
 @pytest.mark.sphinx('xml', testroot='api-set-translator')
-def test_html_with_set_translator_for_xml(app):
+def test_html_with_set_translator_for_xml(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfXMLTranslator'
 
 
 @pytest.mark.sphinx('pseudoxml', testroot='api-set-translator')
-def test_html_with_set_translator_for_pseudoxml(app):
+def test_html_with_set_translator_for_pseudoxml(app: SphinxTestApp) -> None:
     translator_class = app.builder.get_translator_class()
     assert translator_class
     assert translator_class.__name__ == 'ConfPseudoXMLTranslator'
diff --git a/tests/test_writers/test_writer_latex.py b/tests/test_writers/test_writer_latex.py
index 55130c44d52..bf41e18a5d5 100644
--- a/tests/test_writers/test_writer_latex.py
+++ b/tests/test_writers/test_writer_latex.py
@@ -7,7 +7,7 @@
 from sphinx.writers.latex import rstdim_to_latexdim
 
 
-def test_rstdim_to_latexdim():
+def test_rstdim_to_latexdim() -> None:
     # Length units docutils supported
     # https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#length-units
     assert rstdim_to_latexdim('160em') == '160em'