diff --git a/core/modules/simpletest/css/simpletest.module.css b/core/modules/simpletest/css/simpletest.module.css
index 71f7eea..0ecb2a9 100644
--- a/core/modules/simpletest/css/simpletest.module.css
+++ b/core/modules/simpletest/css/simpletest.module.css
@@ -1,9 +1,9 @@
 
 /* Test Table */
-#simpletest-form-table th.select-all {
+.simpletest-test-form .select-all {
   width: 1em;
 }
-th.simpletest-test-label {
+.simpletest-test-label {
   width: 40%;
 }
 
@@ -22,65 +22,61 @@ th.simpletest-test-label {
 .simpletest-test-description .description {
   margin: 0;
 }
-#simpletest-form-table tr td {
-  background-color: white;
-  color: #494949;
-}
-#simpletest-form-table tr.simpletest-group td {
+.simpletest-test-form .simpletest-group td {
   background-color: #edf5fa;
   color: #494949;
 }
 
-table#simpletest-form-table tr.simpletest-group label {
+.simpletest-test-form .simpletest-group label {
   display: inline;
 }
 
-div.message > div.item-list {
+.message > .item-list {
   font-weight: normal;
 }
 
-div.simpletest-pass {
+.simpletest-pass {
   color: #33a333;
 }
 .simpletest-fail {
   color: #981010;
 }
 
-tr.simpletest-pass.odd {
+.simpletest-pass.odd {
   background-color: #b6ffb6;
 }
-tr.simpletest-pass.even {
+.simpletest-pass.even {
   background-color: #9bff9b;
 }
-tr.simpletest-fail.odd {
+.simpletest-fail.odd {
   background-color: #ffc9c9;
 }
-tr.simpletest-fail.even {
+.simpletest-fail.even {
   background-color: #ffacac;
 }
-tr.simpletest-exception.odd {
+.simpletest-exception.odd {
   background-color: #f4ea71;
 }
-tr.simpletest-exception.even {
+.simpletest-exception.even {
   background-color: #f5e742;
 }
-tr.simpletest-debug.odd {
+.simpletest-debug.odd {
   background-color: #eee;
 }
-tr.simpletest-debug.even {
+.simpletest-debug.even {
   background-color: #fff;
 }
 
-a.simpletest-collapse {
+.simpletest-collapse {
   height: 0;
   width: 0;
   top: -99em;
   position: absolute;
 }
-a.simpletest-collapse:focus,
-a.simpletest-collapse:hover {
+.simpletest-collapse:focus,
+.simpletest-collapse:hover {
   font-size: 80%;
-  top: 0px;
+  top: 0;
   height: auto;
   width: auto;
   overflow: visible;