diff --git a/web/chat/composed-message.react.js b/web/chat/composed-message.react.js
--- a/web/chat/composed-message.react.js
+++ b/web/chat/composed-message.react.js
@@ -76,8 +76,6 @@
     });
     const messageBoxContainerClassName = classNames({
       [css.messageBoxContainer]: true,
-      [css.viewerMessageBoxContainer]: isViewer,
-      [css.nonViewerMessageBoxContainer]: !isViewer,
       [css.fixedWidthMessageBoxContainer]: this.props.fixedWidth,
     });
     const messageBoxClassName = classNames({
diff --git a/web/chat/message-action-button.js b/web/chat/message-action-button.js
--- a/web/chat/message-action-button.js
+++ b/web/chat/message-action-button.js
@@ -134,28 +134,24 @@
   if (tooltipPosition === tooltipPositions.TOP_RIGHT) {
     className = classNames(
       css.messageActionTopRightTooltip,
-      css.messageTopRightTooltip,
       css.messageActionExtraAreaTop,
       css.messageActionExtraAreaTopRight,
     );
   } else if (tooltipPosition === tooltipPositions.TOP_LEFT) {
     className = classNames(
       css.messageActionTopLeftTooltip,
-      css.messageTopLeftTooltip,
       css.messageActionExtraAreaTop,
       css.messageActionExtraAreaTopLeft,
     );
   } else if (tooltipPosition === tooltipPositions.RIGHT) {
     className = classNames(
       css.messageActionRightTooltip,
-      css.messageRightTooltip,
       css.messageActionExtraArea,
       css.messageActionExtraAreaRight,
     );
   } else if (tooltipPosition === tooltipPositions.LEFT) {
     className = classNames(
       css.messageActionLeftTooltip,
-      css.messageLeftTooltip,
       css.messageActionExtraArea,
       css.messageActionExtraAreaLeft,
     );