diff --git a/src/nationalarchives/components/card/card.scss b/src/nationalarchives/components/card/card.scss
index bbdb6801..5d885435 100644
--- a/src/nationalarchives/components/card/card.scss
+++ b/src/nationalarchives/components/card/card.scss
@@ -27,7 +27,6 @@
   &__image-container {
     height: 0;
     margin-bottom: 1rem;
-    // padding-bottom: #{math.div(9, 16) * 100%};
     padding-bottom: #{math.div(2, 3) * 100%};
 
     position: relative;
diff --git a/src/nationalarchives/components/hero/hero.scss b/src/nationalarchives/components/hero/hero.scss
index 3b52f49d..a29c9b26 100644
--- a/src/nationalarchives/components/hero/hero.scss
+++ b/src/nationalarchives/components/hero/hero.scss
@@ -162,9 +162,6 @@
   }
 
   &--tint .tna-hero__figure {
-    // @include colour.colour-border("keyline-dark", 1px, solid, top);
-    // @include colour.colour-border("keyline-dark", 1px, solid, bottom);
-
     &::before,
     &::after {
       position: absolute;
@@ -193,14 +190,6 @@
     .tna-hero__image {
       filter: grayscale(1) contrast(1.75) brightness(1.2);
     }
-
-    .tna-hero__content-inner {
-      // @include colour.colour-border("keyline-dark", 1px);
-
-      @include media.on-mobile {
-        // border: none;
-      }
-    }
   }
 
   @include media.on-mobile {
diff --git a/src/nationalarchives/utilities/_forms.scss b/src/nationalarchives/utilities/_forms.scss
index c321b1ab..ea7587be 100644
--- a/src/nationalarchives/utilities/_forms.scss
+++ b/src/nationalarchives/utilities/_forms.scss
@@ -71,7 +71,6 @@
     &--xs {
       font-size: 1em;
       @include typography.main-font;
-      // @include typography.main-font-weight-bold;
     }
   }
 
diff --git a/src/nationalarchives/utilities/_lists.scss b/src/nationalarchives/utilities/_lists.scss
index efff54c6..20cc9121 100644
--- a/src/nationalarchives/utilities/_lists.scss
+++ b/src/nationalarchives/utilities/_lists.scss
@@ -94,15 +94,12 @@
   &--plain {
     dt {
       padding-top: 0;
-      // padding-bottom: 0;
       padding-left: 0;
     }
 
     dd {
-      // margin-bottom: 0.5rem;
       padding-top: 0;
       padding-right: 0;
-      // padding-bottom: 0;
     }
   }
 
diff --git a/src/nationalarchives/variables/_colour.scss b/src/nationalarchives/variables/_colour.scss
index e9a90817..80be6415 100644
--- a/src/nationalarchives/variables/_colour.scss
+++ b/src/nationalarchives/variables/_colour.scss
@@ -123,7 +123,6 @@ $colour-palette-dark: map.merge(
     "contrast-background": #111,
     "contrast-link-visited":
       map.get($colour-palette-default, "contrast-link-visited"),
-    // "accent-background-light": brand-colour("light-grey"),
   )
 ) !default;
 
diff --git a/tasks/test-package.js b/tasks/test-package.js
index f893f182..2eaae3fe 100644
--- a/tasks/test-package.js
+++ b/tasks/test-package.js
@@ -247,4 +247,23 @@ Object.keys(componentsWithJavaScript).forEach((component) => {
 
 console.log("\n");
 
-// TODO: Test CSS for contents
+console.log(`Testing compiled CSS files`);
+const cssAllPackage = fs
+  .readFileSync("package/nationalarchives/all.css")
+  .toString();
+const checkForClasses = ["tna-template", "tna-template__body"];
+checkForClasses.forEach((cssClass) => {
+  const escapedClass = cssClass.replace("-", "\\-");
+  const regExp = cssAllPackage.match(new RegExp(`.${escapedClass}\{`, "g"));
+  if (regExp) {
+    pass(
+      `${cssClass.replace(/`{$/, "")} selector occurs ${regExp.length} time${
+        regExp.length === 1 ? "" : "s"
+      } in compiled CSS`,
+    );
+  } else {
+    fail(`${cssClass.replace(/`{$/, "")} selector missing from compiled CSS`);
+    process.exitCode = 1;
+    throw new Error("CSS test failed");
+  }
+});