diff --git a/securedrop_client/gui/widgets.py b/securedrop_client/gui/widgets.py
index bced5295fd..c4ba32d2f3 100644
--- a/securedrop_client/gui/widgets.py
+++ b/securedrop_client/gui/widgets.py
@@ -1293,7 +1293,7 @@ class SpeechBubble(QWidget):
     """
 
     CSS = '''
-    #speech-bubble {
+    #speech_bubble {
         font-family: 'Source Sans Pro';
         font-weight: 400;
         font-size: 15px;
@@ -1303,7 +1303,7 @@ class SpeechBubble(QWidget):
         border-bottom: 0;
         background-color: #fff;
     }
-    #color-bar {
+    #color_bar {
         padding: 0px;
         background-color: #102781;
         min-height: 5px;
@@ -1322,13 +1322,13 @@ def __init__(self, message_id: str, text: str, update_signal) -> None:
         layout.setSpacing(0)
         self.setLayout(layout)
         self.message = SecureQLabel(text)
-        self.message.setObjectName('speech-bubble')
+        self.message.setObjectName('speech_bubble')
         self.message.setWordWrap(True)
         self.message.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Minimum)
         layout.addWidget(self.message)
 
         self.color_bar = QWidget()
-        self.color_bar.setObjectName('color-bar')
+        self.color_bar.setObjectName('color_bar')
         self.color_bar.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Minimum)
         layout.addWidget(self.color_bar)
 
@@ -1397,11 +1397,11 @@ class ReplyWidget(ConversationWidget):
     """
 
     CSS_COLOR_BAR_REPLY_FAIL = '''
-    background-color: #ff3366;
+    background_color: #ff3366;
     '''
 
     CSS_COLOR_BAR_REPLY = '''
-    background-color: #0065db;
+    background_color: #0065db;
     '''
 
     def __init__(
@@ -1418,9 +1418,6 @@ def __init__(
                          align="right")
         self.message_id = message_id
 
-        # Set css id
-        self.setObjectName('reply-widget')
-
         # Set styles
         self.speech_bubble.color_bar.setStyleSheet(self.CSS_COLOR_BAR_REPLY)
 
diff --git a/tests/gui/test_widgets.py b/tests/gui/test_widgets.py
index a1bd37df24..1662a4c257 100644
--- a/tests/gui/test_widgets.py
+++ b/tests/gui/test_widgets.py
@@ -1101,9 +1101,12 @@ def test_SpeechBubble_init(mocker):
     mock_connect = mocker.Mock()
     mock_signal.connect = mock_connect
 
-    SpeechBubble('mock id', 'hello', mock_signal)
+    sb = SpeechBubble('mock id', 'hello', mock_signal)
+    ss = sb.styleSheet()
+
     mock_label.assert_called_once_with('hello')
     assert mock_connect.called
+    assert 'background-color' in ss
 
 
 def test_SpeechBubble_update_text(mocker):
@@ -1186,10 +1189,8 @@ def test_MessageWidget_init(mocker):
     mock_connected = mocker.Mock()
     mock_signal.connect = mock_connected
 
-    mw = MessageWidget('mock id', 'hello', mock_signal)
-    ss = mw.styleSheet()
+    MessageWidget('mock id', 'hello', mock_signal)
 
-    assert 'background-color' in ss
     assert mock_connected.called
 
 
@@ -1209,16 +1210,14 @@ def test_ReplyWidget_init(mocker):
     mock_failure_connected = mocker.Mock()
     mock_failure_signal.connect = mock_failure_connected
 
-    rw = ReplyWidget(
+    ReplyWidget(
         'mock id',
         'hello',
         mock_update_signal,
         mock_success_signal,
         mock_failure_signal,
     )
-    ss = rw.styleSheet()
 
-    assert 'background-color' in ss
     assert mock_update_connected.called
     assert mock_success_connected.called
     assert mock_failure_connected.called