diff --git a/packages/terra-navigation-side-menu/src/MenuItem.module.scss b/packages/terra-navigation-side-menu/src/MenuItem.module.scss
index c9e82d86c2..921e1bb21c 100644
--- a/packages/terra-navigation-side-menu/src/MenuItem.module.scss
+++ b/packages/terra-navigation-side-menu/src/MenuItem.module.scss
@@ -6,7 +6,6 @@
 :local {
   .list-item {
     background-color: var(--terra-navigation-side-menu-list-item-background-color);
-    border-bottom: var(--terra-navigation-side-menu-list-item-border-bottom, none);
     border-left: var(--terra-navigation-side-menu-list-item-border-left, none);
     border-right: var(--terra-navigation-side-menu-list-item-border-right, none);
     border-top: var(--terra-navigation-side-menu-list-item-border-top, none);
diff --git a/packages/terra-navigation-side-menu/src/NavigationSideMenu.jsx b/packages/terra-navigation-side-menu/src/NavigationSideMenu.jsx
index 177846ddfe..e4717153f4 100644
--- a/packages/terra-navigation-side-menu/src/NavigationSideMenu.jsx
+++ b/packages/terra-navigation-side-menu/src/NavigationSideMenu.jsx
@@ -340,7 +340,7 @@ class NavigationSideMenu extends Component {
         isDisabled={item.isDisabled}
         text={item.text}
         key={key}
-        onClick={(event) => { (!(item.isDisabled)) ? this.handleItemClick(event, key) : undefined; }}
+        onClick={!item.isDisabled ? event => this.handleItemClick(event, key) : undefined}
         onKeyDown={onKeyDown}
         data-menu-item={key}
         tabIndex={(tabIndex === 0 && !(this.onBack)) ? '0' : '-1'}
@@ -395,7 +395,7 @@ class NavigationSideMenu extends Component {
     }
 
     const headerStyles = cx([
-      { headerStyle: true },
+      { 'header-style': (variant === 'drill-in') },
       theme.className,
     ]);
 
diff --git a/packages/terra-navigation-side-menu/src/NavigationSideMenu.module.scss b/packages/terra-navigation-side-menu/src/NavigationSideMenu.module.scss
index 00710c69b2..dd4504a15a 100644
--- a/packages/terra-navigation-side-menu/src/NavigationSideMenu.module.scss
+++ b/packages/terra-navigation-side-menu/src/NavigationSideMenu.module.scss
@@ -19,8 +19,8 @@
     }
   }
 
-  .headerStyle {
-    border-bottom: var(--terra-navigation-side-menu-list-item-border-bottom, 1px solid #D3D4D5);
+  .header-style {
+    border-bottom: var(--terra-navigation-side-menu-list-border-bottom, 1px solid #d3d4d5);
   }
 
   .side-menu-list {
diff --git a/packages/terra-navigation-side-menu/src/orion-fusion-theme/NavigationSideMenuItem.module.scss b/packages/terra-navigation-side-menu/src/orion-fusion-theme/NavigationSideMenuItem.module.scss
index ef33322506..94b884e24d 100644
--- a/packages/terra-navigation-side-menu/src/orion-fusion-theme/NavigationSideMenuItem.module.scss
+++ b/packages/terra-navigation-side-menu/src/orion-fusion-theme/NavigationSideMenuItem.module.scss
@@ -51,6 +51,6 @@
     --terra-navigation-side-menu-focus-outline-offset: 0;
     --terra-navigation-side-menu-item-focus-box-shadow: 0 0 0 1px rgba(76, 178, 233, 0.5), 0 0 4px 3px rgba(76, 178, 233, 0.35);
     --terra-navigation-side-menu-outline-view-item-hover-background-color: #F2F9FE;
-    --terra-navigation-side-menu-outline-view-item-focus-background-color: #FFFFFF;
+    --terra-navigation-side-menu-outline-view-item-focus-background-color: #FFF;
   }
 }