diff --git a/src/peakrdl_regblock/exporter.py b/src/peakrdl_regblock/exporter.py
index 195503e..40f1395 100644
--- a/src/peakrdl_regblock/exporter.py
+++ b/src/peakrdl_regblock/exporter.py
@@ -135,7 +135,7 @@ class RegblockExporter:
 
         if generate_hwif_report:
             path = os.path.join(output_dir, f"{module_name}_hwif.rpt")
-            hwif_report_file = open(path, "w")
+            hwif_report_file = open(path, "w", encoding='utf-8') # pylint: disable=consider-using-with
         else:
             hwif_report_file = None
 
diff --git a/src/peakrdl_regblock/hwif/__init__.py b/src/peakrdl_regblock/hwif/__init__.py
index 809644e..40fe146 100644
--- a/src/peakrdl_regblock/hwif/__init__.py
+++ b/src/peakrdl_regblock/hwif/__init__.py
@@ -1,6 +1,6 @@
-from typing import TYPE_CHECKING, Union, List, Set, Dict
+from typing import TYPE_CHECKING, Union, Set, Dict, Optional, TextIO
 
-from systemrdl.node import AddrmapNode, Node, SignalNode, FieldNode, AddressableNode, RegNode
+from systemrdl.node import AddrmapNode, SignalNode, FieldNode, RegNode
 from systemrdl.rdltypes import PropertyReference
 
 from ..utils import get_indexed_path
@@ -23,7 +23,7 @@ class Hwif:
     def __init__(
         self, exp: 'RegblockExporter', package_name: str,
         in_hier_signal_paths: Set[str], out_of_hier_signals: Dict[str, SignalNode],
-        reuse_typedefs: bool, hwif_report_file: int
+        reuse_typedefs: bool, hwif_report_file: Optional[TextIO]
     ):
         self.exp = exp
         self.package_name = package_name
diff --git a/src/peakrdl_regblock/hwif/generators.py b/src/peakrdl_regblock/hwif/generators.py
index a3c05f8..42ed7b3 100644
--- a/src/peakrdl_regblock/hwif/generators.py
+++ b/src/peakrdl_regblock/hwif/generators.py
@@ -17,7 +17,7 @@ class HWIFStructGenerator(RDLFlatStructGenerator):
 
         self.hwif_report_stack = [hwif_name]
 
-    def push_struct(self, type_name: str, inst_name: str, array_dimensions: Optional[List[int]] = None) -> None:
+    def push_struct(self, type_name: str, inst_name: str, array_dimensions: Optional[List[int]] = None) -> None: # type: ignore
         super().push_struct(type_name, inst_name, array_dimensions)
 
         if array_dimensions:
@@ -31,7 +31,7 @@ class HWIFStructGenerator(RDLFlatStructGenerator):
         super().pop_struct()
         self.hwif_report_stack.pop()
 
-    def add_member(self, name: str, width: int = 1) -> None:
+    def add_member(self, name: str, width: int = 1) -> None: # type: ignore # pylint: disable=arguments-differ
         super().add_member(name, width)
 
         if width > 1:
diff --git a/tests/requirements.txt b/tests/requirements.txt
index 357f5bc..b69ec8c 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,4 +1,6 @@
-pytest
+# hold back: https://github.com/kevlened/pytest-parallel/issues/118
+pytest<7.2
+
 parameterized
 pytest-parallel
 jinja2-simple-tags