diff --git a/securedrop_client/gui/__init__.py b/securedrop_client/gui/__init__.py
index 24cc2f0e3..c342b7e8f 100644
--- a/securedrop_client/gui/__init__.py
+++ b/securedrop_client/gui/__init__.py
@@ -38,7 +38,7 @@ class SvgToggleButton(QPushButton):
         The display size of the SVG, defaults to filling the entire size of the widget.
     """
 
-    def __init__(self, on: str, off: str, svg_size: str=None):
+    def __init__(self, on: str, off: str, svg_size: str = None):
         super().__init__()
 
         # Set layout
@@ -87,7 +87,8 @@ class SvgPushButton(QPushButton):
         The display size of the SVG, defaults to filling the entire size of the widget.
     """
 
-    def __init__(self, normal: str, disabled: str=None, active: str=None, selected: str=None, svg_size:str=None) -> None:
+    def __init__(self, normal: str, disabled: str = None, active: str = None,
+                 selected: str = None, svg_size: str = None) -> None:
         super().__init__()
 
         # Set layout
@@ -122,7 +123,7 @@ class SvgLabel(QLabel):
         The display size of the SVG, defaults to filling the entire size of the widget.
     """
 
-    def __init__(self, filename: str, svg_size: str=None) -> None:
+    def __init__(self, filename: str, svg_size: str = None) -> None:
         super().__init__()
 
         # Remove margins and spacing
diff --git a/securedrop_client/resources/__init__.py b/securedrop_client/resources/__init__.py
index ec78e7731..23e29a7e1 100644
--- a/securedrop_client/resources/__init__.py
+++ b/securedrop_client/resources/__init__.py
@@ -63,7 +63,7 @@ def load_toggle_icon(on: str, off: str) -> QIcon:
     return icon
 
 
-def load_icon(normal: str, disabled: str=None, active: str=None, selected: str=None) -> QIcon:
+def load_icon(normal: str, disabled: str = None, active: str = None, selected: str = None) -> QIcon:
     """
     Add the contents of Scalable Vector Graphics (SVG) files provided for associated icon modes,
     see https://doc.qt.io/qt-5/qicon.html#Mode-enum.