diff --git a/src/bonsai/bonsai/bim/module/bcf/operator.py b/src/bonsai/bonsai/bim/module/bcf/operator.py
index b8daa24e00..a63e94e6af 100644
--- a/src/bonsai/bonsai/bim/module/bcf/operator.py
+++ b/src/bonsai/bonsai/bim/module/bcf/operator.py
@@ -1283,6 +1283,7 @@ class ActivateBcfViewpoint(bpy.types.Operator):
         cam_aspect: float,
         context: bpy.types.Context,
     ) -> None:
+        assert isinstance(obj.data, bpy.types.Camera)
         if viewpoint.visualization_info.orthogonal_camera:
             camera = viewpoint.visualization_info.orthogonal_camera
             obj.data.type = "ORTHO"
diff --git a/src/bonsai/bonsai/bim/module/light/operator.py b/src/bonsai/bonsai/bim/module/light/operator.py
index 0c7e632bf3..2275f7bc55 100644
--- a/src/bonsai/bonsai/bim/module/light/operator.py
+++ b/src/bonsai/bonsai/bim/module/light/operator.py
@@ -392,6 +392,7 @@ ground_glow source ground
         scene.add_surface(scene_path)
         scene.add_source(sky_file_path)
         print("Setting up view...")
+        assert isinstance(camera.data, bpy.types.Camera)
         if camera.data.type == "PERSP":
             # Perspective camera
             camera_fov = camera.data.angle
@@ -547,9 +548,11 @@ class ViewFromSun(bpy.types.Operator):
     def execute(self, context):
         if not (camera := bpy.data.objects.get("SunPathCamera")):
             camera = bpy.data.objects.new("SunPathCamera", bpy.data.cameras.new("SunPathCamera"))
+            assert isinstance(camera.data, bpy.types.Camera)
+            assert context.scene
             camera.data.type = "ORTHO"
             camera.data.ortho_scale = 100  # The default of 6m is too small
-            bpy.context.scene.collection.objects.link(camera)
+            context.scene.collection.objects.link(camera)
         tool.Blender.activate_camera(camera)
         props = context.scene.BIMSolarProperties
         props.hour = props.hour  # Just to refresh camera position
diff --git a/src/bonsai/bonsai/bim/module/structural/decorator.py b/src/bonsai/bonsai/bim/module/structural/decorator.py
index be31aa0706..43b665db0f 100644
--- a/src/bonsai/bonsai/bim/module/structural/decorator.py
+++ b/src/bonsai/bonsai/bim/module/structural/decorator.py
@@ -130,6 +130,7 @@ class LoadsDecorator:
 
         coord = Vector(coord)
         rv3d = context.region_data
+        assert rv3d and context.region
         perspective = rv3d.view_perspective
         view_matrix = rv3d.view_matrix
         point_view_space = view_matrix @ coord
diff --git a/src/bonsai/bonsai/tool/raycast.py b/src/bonsai/bonsai/tool/raycast.py
index 7750c042ae..2ed6b0db88 100644
--- a/src/bonsai/bonsai/tool/raycast.py
+++ b/src/bonsai/bonsai/tool/raycast.py
@@ -66,6 +66,7 @@ class Raycast(bonsai.core.tool.Raycast):
         cls, context: bpy.types.Context, obj: bpy.types.Object
     ) -> Union[tuple[bpy.types.Object, list[float]], None]:
         rv3d = context.region_data
+        assert rv3d
         view_location = rv3d.view_matrix.inverted().translation
         obj_matrix = obj.matrix_world.copy()
         bbox = [obj_matrix @ Vector(v) for v in obj.bound_box]
@@ -138,6 +139,7 @@ class Raycast(bonsai.core.tool.Raycast):
     ):
         region = context.region
         rv3d = context.region_data
+        assert rv3d and region
         original_perspective = rv3d.view_perspective
 
         # TODO The raycast was working for orthographic view, but not when you are inside a camera view. This solution feels hacky,
diff --git a/src/bonsai/bonsai/tool/sequence.py b/src/bonsai/bonsai/tool/sequence.py
index f2ec7b31ba..f85d5af909 100644
--- a/src/bonsai/bonsai/tool/sequence.py
+++ b/src/bonsai/bonsai/tool/sequence.py
@@ -1666,9 +1666,11 @@ class Sequence(bonsai.core.tool.Sequence):
         return predefined_type, object_type
 
     @classmethod
-    def add_animation_camera(cls):
+    def add_animation_camera(cls) -> None:
         bpy.ops.object.camera_add()
         camera = bpy.context.active_object
+        assert camera and isinstance(camera.data, bpy.types.Camera)
+        assert bpy.context.scene
         camera.data.lens = 26
         camera.name = "4D Camera"
         camera.location = mathutils.Vector((15, 0, 15))
diff --git a/src/bonsai/bonsai/tool/snap.py b/src/bonsai/bonsai/tool/snap.py
index cae1c512b0..599d805d7f 100644
--- a/src/bonsai/bonsai/tool/snap.py
+++ b/src/bonsai/bonsai/tool/snap.py
@@ -18,6 +18,7 @@
 
 import bpy
 import ifcopenshell
+import ifcopenshell.util.unit
 import bonsai.core.tool
 import bonsai.tool as tool
 from bonsai.bim.module.model.decorator import PolylineDecorator
@@ -44,8 +45,9 @@ class Snap(bonsai.core.tool.Snap):
         cls.snap_plane_method = value
 
     @classmethod
-    def get_increment_snap_value(cls, context):
+    def get_increment_snap_value(cls, context: bpy.types.Context) -> Union[float, None]:
         rv3d = context.region_data
+        assert rv3d
 
         factor = 1
         fractions = [100, 20, 10, 2]
diff --git a/src/bonsai/test/tool/test_drawing.py b/src/bonsai/test/tool/test_drawing.py
index 17e2de20ef..37a6f8b2e8 100644
--- a/src/bonsai/test/tool/test_drawing.py
+++ b/src/bonsai/test/tool/test_drawing.py
@@ -58,6 +58,7 @@ class TestCreateCamera(NewFile):
         obj = subject.create_camera("Name", mathutils.Matrix(), "PERSPECTIVE")
         assert obj.name == "Name"
         assert obj.matrix_world == mathutils.Matrix()
+        assert isinstance(obj.data, bpy.types.Camera)
         assert obj.data.type == "PERSP"
         assert obj.data.ortho_scale == 50
         assert obj.data.clip_end == 10