diff --git a/pyproject.toml b/pyproject.toml
index 3cc1b31a3..eeff608b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ doc = [
 dev-doc = ["towncrier>=24.8.0"] # release notes tool
 test = [
     "loompy>=3.0.5",
-    "pytest>=8.2",
+    "pytest>=8.2,<8.3.4",
     "pytest-cov>=2.10",
     "zarr<3.0.0a0",
     "matplotlib",
diff --git a/src/anndata/_io/specs/registry.py b/src/anndata/_io/specs/registry.py
index ca13f8e59..798b812d4 100644
--- a/src/anndata/_io/specs/registry.py
+++ b/src/anndata/_io/specs/registry.py
@@ -130,7 +130,6 @@ def get_write(
 
         if dest_type is h5py.File:
             dest_type = h5py.Group
-
         if (dest_type, src_type, modifiers) not in self.write:
             raise IORegistryError._from_write_parts(dest_type, src_type, modifiers)
         internal = self.write[(dest_type, src_type, modifiers)]