diff --git a/lib/jasmine-core/jasmine.css b/lib/jasmine-core/jasmine.css
index 6543aab4..81dd5b3e 100644
--- a/lib/jasmine-core/jasmine.css
+++ b/lib/jasmine-core/jasmine.css
@@ -1,7 +1,7 @@
 @charset "UTF-8";
 body { overflow-y: scroll; }
 
-.jasmine_html-reporter { background-color: #eee; padding: 5px; margin: -8px; font-size: 11px; font-family: Monaco, "Lucida Console", monospace; line-height: 14px; color: #333; }
+.jasmine_html-reporter { width: 100%; background-color: #eee; padding: 5px; margin: -8px; font-size: 11px; font-family: Monaco, "Lucida Console", monospace; line-height: 14px; color: #333; }
 
 .jasmine_html-reporter a { text-decoration: none; }
 
diff --git a/src/html/_HTMLReporter.scss b/src/html/_HTMLReporter.scss
index 1ea2a030..2b128a04 100644
--- a/src/html/_HTMLReporter.scss
+++ b/src/html/_HTMLReporter.scss
@@ -27,6 +27,7 @@ body {
 }
 
 .jasmine_html-reporter {
+  width: 100%;
   background-color: $page-background-color;
   padding: 5px;
   margin: -8px;
@@ -305,7 +306,7 @@ body {
 
       &.jasmine-excluded a {
         color: $neutral-color;
-      } 
+      }
     }
   }
 
@@ -329,7 +330,7 @@ body {
 
       &.jasmine-excluded a:before {
         content: $passing-mark + $space;
-      } 
+      }
     }
   }