diff --git a/core/themes/seven/css/style.css b/core/themes/seven/css/style.css
index aa78e66..4fa4a81 100644
--- a/core/themes/seven/css/style.css
+++ b/core/themes/seven/css/style.css
@@ -1581,3 +1581,13 @@ details.fieldset-no-legend {
   border: none;
   text-decoration: underline;
 }
+
+/**
+ * Simpletest styles.
+ *
+ * Remove the default uppercase transformation for summaries in the results form
+ * as the summaries are fully-qualified class names.
+ */
+.simpletest-results-form summary {
+  text-transform: none;
+}