diff --git a/src/pystencils/backend/kernelcreation/freeze.py b/src/pystencils/backend/kernelcreation/freeze.py
index 5bb7f8b088a04e9c9d484896946be7029ab24d0f..c8d84c1b47d0ecd9eecfa7aa0bad14b79459828e 100644
--- a/src/pystencils/backend/kernelcreation/freeze.py
+++ b/src/pystencils/backend/kernelcreation/freeze.py
@@ -227,7 +227,6 @@ class FreezeExpressions:
         self._ctx.add_symbol_reduction_info(new_lhs_symb, reduction_info)
         self._ctx.replace_symbol(orig_lhs_symb, orig_lhs_symb_as_ptr)
 
-
         return PsAssignment(new_lhs, new_rhs)
 
     def map_Symbol(self, spsym: sp.Symbol) -> PsSymbolExpr:
diff --git a/src/pystencils/codegen/parameters.py b/src/pystencils/codegen/parameters.py
index e6a513cc7cec928373b11e3ea46e703c27aa2443..d8411266ee514d4270a7a9d1c2fb24383f005329 100644
--- a/src/pystencils/codegen/parameters.py
+++ b/src/pystencils/codegen/parameters.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from warnings import warn
-from typing import Sequence, Iterable, Optional
+from typing import Sequence, Iterable
 
 from .properties import (
     PsSymbolProperty,
diff --git a/src/pystencils/compound_op_mapping.py b/src/pystencils/compound_op_mapping.py
index eb10b3381d7cc00da6f2a198532ab54519f028b9..1eadfa6f059d454c750d29b110fb2f21283fbcb3 100644
--- a/src/pystencils/compound_op_mapping.py
+++ b/src/pystencils/compound_op_mapping.py
@@ -1,4 +1,3 @@
-from enum import Enum
 from operator import truediv, mul, sub, add
 
 from .backend.ast.expressions import PsExpression, PsCall