diff --git a/pyproject.toml b/pyproject.toml
index 77000dc..667e765 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,11 +72,6 @@ select = [
   "F",      # Pyflakes
   "W",      # pycodestyle
 ]
-ignore = [
-  "B007",
-  "B028",
-  "B904",
-]
 target-version = "py38"
 
 [tool.ruff.per-file-ignores]
diff --git a/wn/__main__.py b/wn/__main__.py
index 4bd3c23..c9b1441 100644
--- a/wn/__main__.py
+++ b/wn/__main__.py
@@ -61,7 +61,7 @@ def _validate(args):
                     with open(args.output_file, 'w') as outfile:
                         json.dump(report, outfile, indent=2)
                 else:
-                    for code, check in report.items():
+                    for _code, check in report.items():
                         if not check['items']:
                             continue
                         print(f'  {check["message"]}')
diff --git a/wn/_core.py b/wn/_core.py
index 2fa911d..fd24dd7 100644
--- a/wn/_core.py
+++ b/wn/_core.py
@@ -1133,7 +1133,8 @@ def __init__(
                     if missing:
                         warnings.warn(
                             f'lexicon dependencies not available: {missing}',
-                            wn.WnWarning
+                            wn.WnWarning,
+                            stacklevel=2,
                         )
                 expand = ' '.join(
                     f'{id}:{ver}' for id, ver, _id in deps if _id is not None
@@ -1160,7 +1161,7 @@ def word(self, id: str) -> Word:
         try:
             return Word(*next(iterable), self)
         except StopIteration:
-            raise wn.Error(f'no such lexical entry: {id}')
+            raise wn.Error(f'no such lexical entry: {id}') from None
 
     def words(
         self,
@@ -1183,7 +1184,7 @@ def synset(self, id: str) -> Synset:
         try:
             return Synset(*next(iterable), self)
         except StopIteration:
-            raise wn.Error(f'no such synset: {id}')
+            raise wn.Error(f'no such synset: {id}') from None
 
     def synsets(
         self,
@@ -1210,7 +1211,7 @@ def sense(self, id: str) -> Sense:
         try:
             return Sense(*next(iterable), self)
         except StopIteration:
-            raise wn.Error(f'no such sense: {id}')
+            raise wn.Error(f'no such sense: {id}') from None
 
     def senses(
         self,
@@ -1233,7 +1234,7 @@ def ili(self, id: str) -> ILI:
         try:
             return ILI(*next(iterable))
         except StopIteration:
-            raise wn.Error(f'no such ILI: {id}')
+            raise wn.Error(f'no such ILI: {id}') from None
 
     def ilis(self, status: Optional[str] = None) -> List[ILI]:
         """Return the list of ILIs in this wordnet.