diff --git a/app/assets/stylesheets/statistics.css.scss b/app/assets/stylesheets/statistics.css.scss
index 631de920..ebabe3f7 100644
--- a/app/assets/stylesheets/statistics.css.scss
+++ b/app/assets/stylesheets/statistics.css.scss
@@ -26,3 +26,26 @@
     margin-top: auto;
     margin-bottom: auto;
 }
+
+div.unit-test-result {
+  float: left;
+  margin-right: 10px;
+  width: 10px;
+  height: 10px;
+}
+
+div.positive-result {
+  border-radius: 50%;
+  background-color: #8efa00;
+  -webkit-box-shadow: 0px 0px 11px 1px rgba(44,222,0,1);
+  -moz-box-shadow: 0px 0px 11px 1px rgba(44,222,0,1);
+  box-shadow: 0px 0px 11px 1px rgba(44,222,0,1);
+}
+
+div.negative-result {
+  border-radius: 50%;
+  background-color: #ff2600;
+  -webkit-box-shadow: 0px 0px 11px 1px rgba(222,0,0,1);
+  -moz-box-shadow: 0px 0px 11px 1px rgba(222,0,0,1);
+  box-shadow: 0px 0px 11px 1px rgba(222,0,0,1);
+}
diff --git a/app/views/exercises/external_users/statistics.html.slim b/app/views/exercises/external_users/statistics.html.slim
index 456b0439..da898ddd 100644
--- a/app/views/exercises/external_users/statistics.html.slim
+++ b/app/views/exercises/external_users/statistics.html.slim
@@ -47,7 +47,12 @@ h1 = "#{@exercise} (external user #{@external_user})"
               td.clickable = submission.created_at.strftime("%F %T")
               td = submission.cause
               td = submission.score
-              td = submission.testruns.map{|run| run.passed ? 'p' : 'f'}.join(' ')
+              td
+                -submission.testruns.each do |run|
+                  - if run.passed
+                    .unit-test-result.positive-result
+                  - else
+                    .unit-test-result.negative-result
               td = Time.at(deltas[1..index].inject(:+)).utc.strftime("%H:%M:%S") if index > 0
     p = t('.addendum')