diff --git a/nornir/core/configuration.py b/nornir/core/configuration.py
index 9705345e..543d2bc1 100644
--- a/nornir/core/configuration.py
+++ b/nornir/core/configuration.py
@@ -211,7 +211,7 @@ def dict(self) -> Dict[str, Any]:
 
 
 class CoreConfig:
-    __slots__ = "raise_on_error"
+    __slots__ = ("raise_on_error",)
 
     class Parameters:
         raise_on_error = Parameter(default=False, envvar="NORNIR_CORE_RAISE_ON_ERROR")
diff --git a/pyproject.toml b/pyproject.toml
index 6669cdb6..a0d34149 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -161,7 +161,6 @@ ignore = [
     "PERF203", # `try`-`except` within a loop incurs performance overhead
     "PGH004",  # Use specific rule codes when using `noqa`
     "PIE800",  # Unnecessary spread `**`
-    "PLC0205", # Class `__slots__` should be a non-string iterable
     "PLC2801", # Unnecessary dunder call to `__getattribute__`. Access attribute directly or use getattr built-in function
     "PLR6201", # Use a `set` literal when testing for membership
     "PLR6301", # Method `run` could be a function, class method, or static method