diff --git a/ipykernel/kernelspec.py b/ipykernel/kernelspec.py
index 6404c2a1..414b1d95 100644
--- a/ipykernel/kernelspec.py
+++ b/ipykernel/kernelspec.py
@@ -165,7 +165,7 @@ def install(
     )
     # cleanup afterward
     shutil.rmtree(path)
-    return dest  # type:ignore[no-any-return]
+    return dest
 
 
 # Entrypoint
diff --git a/pyproject.toml b/pyproject.toml
index 8f9ac894..56480362 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -112,7 +112,7 @@ matrix.qt.features = [
 
 [tool.hatch.envs.typing]
 features = ["test"]
-dependencies = ["mypy>=1.6.0", "traitlets>=5.11.2", "ipython>=8.16.1"]
+dependencies = ["mypy>=1.6.0", "traitlets>=5.12.0", "ipython>=8.16.1", "jupyter_client>=8.5"]
 [tool.hatch.envs.typing.scripts]
 test = "mypy --install-types --non-interactive {args}"