diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index b77fcb47b..8f8d2950b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -43,13 +43,13 @@ repos:
       exclude: "asdf/(extern||_jsonschema)/.*"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: 'v0.0.287'
+  rev: 'v0.0.288'
   hooks:
     - id: ruff
       args: ["--fix"]
 
 - repo: https://github.com/psf/black
-  rev: 23.7.0
+  rev: 23.9.1
   hooks:
     - id: black
 
diff --git a/asdf/_tests/test_generic_io.py b/asdf/_tests/test_generic_io.py
index 24860913a..31030ed73 100644
--- a/asdf/_tests/test_generic_io.py
+++ b/asdf/_tests/test_generic_io.py
@@ -401,7 +401,7 @@ def test_invalid_obj(tmp_path):
 
 
 def test_nonseekable_file(tmp_path):
-    base = io.IOBase
+    base = io.FileIO
 
     class FileWrapper(base):
         def tell(self):
diff --git a/asdf/conftest.py b/asdf/conftest.py
index e327cc1d5..97ef87ce4 100644
--- a/asdf/conftest.py
+++ b/asdf/conftest.py
@@ -1,4 +1,32 @@
+import os
+
+import pytest
+
 # We ignore these files because these modules create deprecation warnings on
 # import. When warnings are turned into errors this will completely prevent
 # test collection
 collect_ignore = ["asdftypes.py", "fits_embed.py", "resolver.py", "type_index.py", "types.py", "tests/helpers.py"]
+
+
+@pytest.fixture(scope="session", autouse=True)
+def _temp_cwd(tmpdir_factory):
+    """
+    This fixture creates a temporary current working directory
+    for the test session, so that docstring tests that write files
+    don't clutter up the real cwd.
+    """
+    original_cwd = os.getcwd()
+    try:
+        os.chdir(tmpdir_factory.mktemp("cwd"))
+        yield
+    finally:
+        os.chdir(original_cwd)
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--jsonschema",
+        action="store_true",
+        default=False,
+        help="Run jsonschema test suite tests",
+    )
diff --git a/conftest.py b/conftest.py
deleted file mode 100644
index 342acd162..000000000
--- a/conftest.py
+++ /dev/null
@@ -1,27 +0,0 @@
-import os
-
-import pytest
-
-
-@pytest.fixture(scope="session", autouse=True)
-def _temp_cwd(tmpdir_factory):
-    """
-    This fixture creates a temporary current working directory
-    for the test session, so that docstring tests that write files
-    don't clutter up the real cwd.
-    """
-    original_cwd = os.getcwd()
-    try:
-        os.chdir(tmpdir_factory.mktemp("cwd"))
-        yield
-    finally:
-        os.chdir(original_cwd)
-
-
-def pytest_addoption(parser):
-    parser.addoption(
-        "--jsonschema",
-        action="store_true",
-        default=False,
-        help="Run jsonschema test suite tests",
-    )