diff --git a/test/test_configuration.py b/test/test_configuration.py
index a4573c6..7afe8c8 100644
--- a/test/test_configuration.py
+++ b/test/test_configuration.py
@@ -7,7 +7,6 @@ import pytest
 
 from topen import TConf, build_config
 
-
 class TestTConf:
     def test_paths_are_expanded(self):
         cfg = TConf.from_dict(
@@ -63,17 +62,6 @@ class TestBuildConfigPrecedence:
         cfg = build_config()
         assert cfg.notes_ext == "from-env"
 
-    def test_circular_env_vars(self, isolate_env, monkeypatch, fake_id):
-        """Test environment variables with circular references."""
-        for k, v in {
-            "TOPEN_NOTES_DIR": "$TOPEN_NOTES_DIR/subdir",
-            "EDITOR": "${EDITOR}_backup",
-        }.items():
-            monkeypatch.setenv(k, v)
-        cfg = build_config()
-        assert cfg.notes_dir == Path("$TOPEN_NOTES_DIR/subdir/subdir")
-        assert cfg.notes_editor == "nano"
-
     def test_cli_overrides_env(self, fake_rc, monkeypatch, isolate_env):
         fake_rc.write_text("notes.ext=from-rc\n")
         monkeypatch.setenv("TOPEN_NOTES_EXT", "from-env")
diff --git a/test/test_problems_edge_cases.py b/test/test_problems_edge_cases.py
deleted file mode 100644
index 1d787af..0000000
--- a/test/test_problems_edge_cases.py
+++ /dev/null
@@ -1,64 +0,0 @@
-import configparser
-import os
-import tempfile
-from pathlib import Path
-from unittest.mock import patch
-
-import pytest
-
-from topen import _ensure_parent_dir, get_notes_file, get_task, parse_env, parse_rc
-
-
-class TestFSEdgeCases:
-    """Test edge cases for TaskWarrior integration and file system operations."""
-
-    def test_nonexistent_task_id(self, tmp_path):
-        """Test raised error for non-existent task IDs."""
-        with patch("tasklib.TaskWarrior") as mock_tw:
-            mock_tw.return_value.tasks.get.side_effect = [
-                Exception("Task not found"),
-            ]
-
-            with pytest.raises(
-                Exception,
-                match="Task matching query does not exist. Lookup parameters were {'uuid': '999999'}",
-            ):
-                get_task("999999", tmp_path)
-
-    def test_read_only_notes_directory(self, tmp_path):
-        """Test raised error when notes directory is read-only."""
-        notes_dir = tmp_path / "read_only_notes"
-        notes_dir.mkdir()
-
-        # Make directory read-only
-        os.chmod(notes_dir, 0o444)
-
-        fpath = notes_dir / "subdir_cant_be_written" / "uuid.md"
-        with pytest.raises(PermissionError):
-            _ensure_parent_dir(fpath)
-
-    def test_symlink_notes_directory(self, tmp_path):
-        """Test behavior with symlinked notes directory,
-        reading the linked dir instead of the real dir. """
-        real_dir = tmp_path / "real_notes"
-        real_dir.mkdir()
-        link_dir = tmp_path / "linked_notes"
-        link_dir.symlink_to(real_dir)
-
-        fpath = get_notes_file("test-uuid", link_dir, "md")
-        assert fpath.parent == link_dir
-
-    def test_empty_taskrc_file(self, tmp_path):
-        """Test functional handling of empty taskrc file."""
-        fake_rc: Path = tmp_path / "empty.taskrc"
-        fake_rc.touch()
-        assert parse_rc(fake_rc) == {}
-
-    def test_taskrc_with_invalid_syntax(self, tmp_path):
-        """Test functional handling of taskrc with invalid syntax."""
-        invalid_rc: Path = tmp_path / "invalid.taskrc"
-        invalid_rc.write_text(
-            "invalid line == [MMMM] with too many = = equals sign\ndata.location = valid_value\n"
-        )
-
-        assert parse_rc(invalid_rc)
diff --git a/topen.py b/topen.py
index ae56f93..b5374e1 100755
--- a/topen.py
+++ b/topen.py
@@ -51,24 +51,19 @@ def main(cfg: "TConf | None" = None, io: "_IO | None" = None) -> int:
         io = _IO(quiet=cfg.notes_quiet)
 
     if not cfg.task_id:
-        io.err("Please provide task ID as argument.\n")
+        _ = io.err("Please provide task ID as argument.\n")
         return 1
 
     try:
         task = get_task(id=cfg.task_id, data_location=cfg.task_data)
         uuid = cast(str, task["uuid"])
     except Task.DoesNotExist:
-        io.err(f"Could not find task for ID: {cfg.task_id}.\n")
+        _ = io.err(f"Could not find task for ID: {cfg.task_id}.\n")
         return 1
 
     fpath = get_notes_file(uuid, notes_dir=cfg.notes_dir, notes_ext=cfg.notes_ext)
 
-    try:
-        _ensure_parent_dir(fpath)
-    except PermissionError:
-        io.err(f"Could not write required directories for path: {fpath}.\n")
-        return 1
-
+    _ensure_parent_dir(fpath)
     io.out(f"Editing note: {fpath}")
     open_editor(fpath, editor=cfg.notes_editor, io=io)