diff --git a/app/assets/javascripts/editor.js.erb b/app/assets/javascripts/editor.js.erb
index 4164eb80..2e171bf5 100644
--- a/app/assets/javascripts/editor.js.erb
+++ b/app/assets/javascripts/editor.js.erb
@@ -703,7 +703,8 @@ $(function() {
     panel.find('.row .col-sm-9').eq(1).find('.number').eq(0).text((result.score * result.weight).toFixed(2));
     panel.find('.row .col-sm-9').eq(1).find('.number').eq(1).text(result.weight);
     panel.find('.row .col-sm-9').eq(2).text(result.message);
-    panel.find('.row .col-sm-9').eq(3).find('a').attr('href', '#output-' + index);
+    panel.find('.row .col-sm-9').eq(3).text(result.error_messages.join(', '));
+    panel.find('.row .col-sm-9').eq(4).find('a').attr('href', '#output-' + index);
   };
 
   var chunkBuffer = [{streamedResponse: true}];
diff --git a/app/views/exercises/implement.html.slim b/app/views/exercises/implement.html.slim
index 6ede6d68..728492b6 100644
--- a/app/views/exercises/implement.html.slim
+++ b/app/views/exercises/implement.html.slim
@@ -66,6 +66,7 @@
                   = row(label: '.passed_tests', value: t('shared.out_of', maximum_value: 0, value: 0).html_safe)
                   = row(label: 'activerecord.attributes.submission.score', value: t('shared.out_of', maximum_value: 0, value: 0).html_safe)
                   = row(label: '.feedback')
+                  = row(label: '.error_messages')
                   = row(label: '.output', value: link_to(t('shared.show'), '#'))
           #score data-maximum-score=@exercise.maximum_score data-score=@submission.try(:score)
             h4
diff --git a/config/locales/de.yml b/config/locales/de.yml
index a6ab22c8..f35a5442 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -222,6 +222,7 @@ de:
         text: 'Ihr Browser unterstützt nicht alle Funktionalitäten, die %{application_name} benötigt. Bitte nutzen Sie einen modernen Browser, um %{application_name} zu besuchen.'
         title: Ihr Browser wird nicht unterstützt!
       default_feedback: Sehr gut. Alle Tests waren erfolgreich.
+      error_messages: Fehlermeldungen
       feedback: Feedback
       file: 'Test-Datei <span class="number">%{number}</span> (<span class="filename">%{filename}</span>)'
       hint: Tipp
diff --git a/config/locales/en.yml b/config/locales/en.yml
index b9f7ca80..399e6c66 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -222,6 +222,7 @@ en:
         text: 'Your browser does not support features required for using %{application_name}. Please access %{application_name} using a modern browser.'
         title: Your browser is not supported!
       default_feedback: Well done. All tests have been passed.
+      error_messages: Error Messages
       feedback: Feedback
       file: 'Test File <span class="number">%{number}</span> (<span class="filename">%{filename}</span>)'
       hint: Hint
diff --git a/lib/py_unit_adapter.rb b/lib/py_unit_adapter.rb
index 0e80c593..68cdd200 100644
--- a/lib/py_unit_adapter.rb
+++ b/lib/py_unit_adapter.rb
@@ -1,6 +1,7 @@
 class PyUnitAdapter < TestingFrameworkAdapter
   COUNT_REGEXP = /Ran (\d+) test/
   FAILURES_REGEXP = /FAILED \(failures=(\d+)\)/
+  ASSERTION_ERROR_REGEXP = /AssertionError:\s(.*)/
 
   def self.framework_name
     'PyUnit'
@@ -10,6 +11,7 @@ class PyUnitAdapter < TestingFrameworkAdapter
     count = COUNT_REGEXP.match(output[:stderr]).captures.first.to_i
     matches = FAILURES_REGEXP.match(output[:stderr])
     failed = matches ? matches.captures.try(:first).to_i : 0
-    {count: count, failed: failed}
+    error_matches = ASSERTION_ERROR_REGEXP.match(output[:stderr]).captures
+    {count: count, failed: failed, error_messages: error_matches}
   end
 end