diff --git a/static/styles/message_edit_history.scss b/static/styles/message_edit_history.scss
index 4fabce2dfc..8f013ece64 100644
--- a/static/styles/message_edit_history.scss
+++ b/static/styles/message_edit_history.scss
@@ -17,19 +17,20 @@
     .messagebox-content {
         padding: 0px 10px;
     }
-}
 
-.rendered_markdown {
-    /* Highlighting for message edit history */
-    .highlight_text_inserted {
-        color: hsl(122, 72%, 30%);
-        background-color: hsl(120, 64%, 95%);
-    }
+    .message_edit_history_content {
+        .highlight_text_inserted {
+            color: hsl(122, 72%, 30%);
+            background-color: hsl(120, 64%, 95%);
+        }
 
-    .highlight_text_deleted {
-        color: hsl(0, 100%, 50%);
-        background-color: hsl(7, 90%, 92%);
-        text-decoration: line-through;
-        word-break: break-all;
+        .highlight_text_deleted {
+            color: hsl(0, 100%, 50%);
+            background-color: hsl(7, 90%, 92%);
+            text-decoration: line-through;
+            word-break: break-all;
+        }
     }
 }
+
+
diff --git a/static/styles/night_mode.scss b/static/styles/night_mode.scss
index fc34989f13..66e5981f48 100644
--- a/static/styles/night_mode.scss
+++ b/static/styles/night_mode.scss
@@ -479,16 +479,20 @@ on a dark background, and don't change the dark labels dark either. */
             background-color: hsla(355, 37%, 31%, 1);
             box-shadow: 0px 0px 0px 1px hsla(330, 40%, 20%, 1);
         }
+    }
 
-        .highlight_text_inserted {
-            color: hsl(122, 100%, 81%);
-            background-color: hsla(120, 64%, 95%, 0.3);
-        }
+    #message-edit-history {
+        .message_edit_history_content {
+            .highlight_text_inserted {
+                color: hsl(122, 100%, 81%);
+                background-color: hsla(120, 64%, 95%, 0.3);
+            }
 
-        .highlight_text_deleted {
-            text-decoration: line-through;
-            background-color: hsla(7, 54%, 62%, 0.38);
-            color: hsl(0, 90%, 67%);
+            .highlight_text_deleted {
+                color: hsl(0, 90%, 67%);
+                background-color: hsla(7, 54%, 62%, 0.38);
+                text-decoration: line-through;
+            }
         }
     }