diff --git a/autotest/test_fixtures.py b/autotest/test_fixtures.py
index b9fa5b5..7470745 100644
--- a/autotest/test_fixtures.py
+++ b/autotest/test_fixtures.py
@@ -37,11 +37,23 @@ def test_function_scoped_tmpdir_slash_in_name(function_tmpdir, name):
 
     # node name might have slashes if test function is parametrized
     # (e.g., test_function_scoped_tmpdir_slash_in_name[a/slash])
-    replaced1 = name.replace("/", "_").replace("\\", "_").replace(":", "_")
-    replaced2 = name.replace("/", "_").replace("\\", "__").replace(":", "_")
+    replaced1 = (
+        name.replace("/", "_")
+        .replace("\\", "_")
+        .replace(":", "_")
+        .replace("[", "")
+        .replace("]", "")
+    )
+    replaced2 = (
+        name.replace("/", "_")
+        .replace("\\", "__")
+        .replace(":", "_")
+        .replace("[", "")
+        .replace("]", "")
+    )
     assert (
-        f"{inspect.currentframe().f_code.co_name}[{replaced1}]" in function_tmpdir.stem
-        or f"{inspect.currentframe().f_code.co_name}[{replaced2}]"
+        f"{inspect.currentframe().f_code.co_name}_{replaced1}_" in function_tmpdir.stem
+        or f"{inspect.currentframe().f_code.co_name}_{replaced2}_"
         in function_tmpdir.stem
     )
 
diff --git a/modflow_devtools/fixtures.py b/modflow_devtools/fixtures.py
index 963fa4e..3e6dc12 100644
--- a/modflow_devtools/fixtures.py
+++ b/modflow_devtools/fixtures.py
@@ -16,8 +16,14 @@
 
 @pytest.fixture(scope="function")
 def function_tmpdir(tmpdir_factory, request) -> Generator[Path, None, None]:
-    node = request.node.name.replace("/", "_").replace("\\", "_").replace(":", "_")
-    temp = Path(tmpdir_factory.mktemp(node))
+    node_name = (
+        request.node.name.replace("/", "_")
+        .replace("\\", "_")
+        .replace(":", "_")
+        .replace("[", "_")
+        .replace("]", "_")
+    )
+    temp = Path(tmpdir_factory.mktemp(node_name))
     yield Path(temp)
 
     keep = request.config.option.KEEP
diff --git a/modflow_devtools/misc.py b/modflow_devtools/misc.py
index 08a03f4..882a9ff 100644
--- a/modflow_devtools/misc.py
+++ b/modflow_devtools/misc.py
@@ -2,6 +2,7 @@
 import socket
 import sys
 import traceback
+from _warnings import warn
 from ast import literal_eval
 from contextlib import contextmanager
 from functools import wraps
@@ -16,8 +17,6 @@
 from urllib import request
 from urllib.error import URLError
 
-from _warnings import warn
-
 
 @contextmanager
 def set_dir(path: PathLike):