diff --git a/static/styles/alerts.scss b/static/styles/alerts.scss
index 91bd97ffd9..8a42f33d16 100644
--- a/static/styles/alerts.scss
+++ b/static/styles/alerts.scss
@@ -123,7 +123,6 @@ $alert-error-red: hsl(0, 80%, 40%);
         .code-context {
             color: hsl(0, 7%, 15%);
             background-color: hsl(0, 7%, 98%);
-            background-color: hsl(0, 7%, 98%);
             box-shadow: inset 0px 11px 10px -10px hsl(0, 7%, 70%),
                 inset 0px -11px 10px -10px hsl(0, 7%, 70%);
 
diff --git a/static/styles/app_components.scss b/static/styles/app_components.scss
index 9a00aa2b84..a9c83f7a45 100644
--- a/static/styles/app_components.scss
+++ b/static/styles/app_components.scss
@@ -281,7 +281,6 @@
     left: 0;
     width: 100%;
     height: 100%;
-    overflow: auto;
     -webkit-overflow-scrolling: touch;
 
     background-color: hsla(0, 0%, 13%, 0.8);
diff --git a/static/styles/left-sidebar.scss b/static/styles/left-sidebar.scss
index 116c53290a..203d76281c 100644
--- a/static/styles/left-sidebar.scss
+++ b/static/styles/left-sidebar.scss
@@ -428,7 +428,6 @@ ul.topic-list {
 
 ul.expanded_private_messages {
     list-style-type: none;
-    font-weight: 300;
     font-size: 13px;
     font-weight: 400;
     margin-left: 0px;
diff --git a/static/styles/lightbox.scss b/static/styles/lightbox.scss
index acc496ec79..202d567113 100644
--- a/static/styles/lightbox.scss
+++ b/static/styles/lightbox.scss
@@ -43,7 +43,6 @@
 
         color: hsla(0, 0%, 100%, 0.8);
         font-size: 2rem;
-        font-weight: 200;
         margin: 24px 20px 0px 0px;
 
         transform: scaleY(0.75);
diff --git a/static/styles/portico/landing-page.scss b/static/styles/portico/landing-page.scss
index 4336fc43dd..b0113ba85c 100644
--- a/static/styles/portico/landing-page.scss
+++ b/static/styles/portico/landing-page.scss
@@ -1170,7 +1170,6 @@ nav {
     margin: -300px auto 0px auto;
 
     width: 600px;
-    background-color: hsl(0, 0%, 98%);
     height: 350px;
 
     padding: 10px 30px 10px 30px;
@@ -2467,7 +2466,6 @@ nav {
     top: auto;
     bottom: 10px;
     left: calc(50% - 17.5px);
-    background-color: hsl(0, 0%, 80%);
 
     border-radius: 8px;
     background-color: hsl(0, 0%, 13%);
@@ -2552,7 +2550,6 @@ nav {
 }
 
 .portico-landing.plans .main .padded-content > h2 {
-    color: hsl(0, 0%, 27%);
     text-align: center;
 
     font-size: 1.5em;
diff --git a/static/styles/recent_topics.scss b/static/styles/recent_topics.scss
index 4ceca2a892..cc3629d36c 100644
--- a/static/styles/recent_topics.scss
+++ b/static/styles/recent_topics.scss
@@ -158,7 +158,6 @@
             font-weight: 400;
             letter-spacing: 0.6px;
             border-radius: 4px;
-            background-color: hsl(0, 0%, 89%);
             padding: 0 4px;
             margin-right: 10px;
             align-self: center;
diff --git a/static/styles/right-sidebar.scss b/static/styles/right-sidebar.scss
index 4633aaff70..5ef04e99e6 100644
--- a/static/styles/right-sidebar.scss
+++ b/static/styles/right-sidebar.scss
@@ -119,7 +119,6 @@
         float: right;
         padding: 0 4px;
         background-color: hsl(105, 2%, 50%);
-        border-radius: 0px;
         color: hsl(0, 0%, 100%);
         font-size: 12px;
         line-height: 14px;
diff --git a/static/styles/settings.scss b/static/styles/settings.scss
index 76b98555b5..56faf92fa6 100644
--- a/static/styles/settings.scss
+++ b/static/styles/settings.scss
@@ -889,7 +889,6 @@ input[type="checkbox"] {
     .api_key .api-key-value-and-button {
         display: block;
         margin-left: 0px;
-        white-space: pre-wrap;
         word-wrap: break-word;
         word-break: break-all;
         white-space: normal;
@@ -906,7 +905,6 @@ input[type="checkbox"] {
     }
 
     .field {
-        font-weight: 300;
         text-transform: uppercase;
         font-weight: 600;
         color: hsl(0, 0%, 67%);
@@ -1010,7 +1008,6 @@ input[type="checkbox"] {
 
     .alert_word_listing .value {
         display: block;
-        white-space: pre-wrap;
         word-wrap: break-word;
         word-break: break-all;
         white-space: normal;
diff --git a/static/styles/subscriptions.scss b/static/styles/subscriptions.scss
index 2c2277aaba..d8f7f00c53 100644
--- a/static/styles/subscriptions.scss
+++ b/static/styles/subscriptions.scss
@@ -129,7 +129,6 @@
 .stream-email .email-address {
     display: block;
     margin: auto;
-    white-space: pre-wrap;
     word-wrap: break-word;
     word-break: break-all;
     white-space: normal;
@@ -1152,7 +1151,6 @@ ul.grey-box {
         left: 101%;
 
         top: 45px;
-        border-top: 1px solid hsl(0, 0%, 87%);
         background-color: hsl(0, 0%, 100%);
         border-top: none;
 
diff --git a/stylelint.config.js b/stylelint.config.js
index 88a3625e71..2225214846 100644
--- a/stylelint.config.js
+++ b/stylelint.config.js
@@ -8,7 +8,6 @@ module.exports = {
         "property-no-unknown": [true, {ignoreProperties: [/^mso-/]}],
 
         // Disable recommended rules we don't comply with yet
-        "declaration-block-no-duplicate-properties": null,
         "declaration-block-no-shorthand-property-overrides": null,
         "font-family-no-missing-generic-family-keyword": null,
         "no-descending-specificity": null,