diff --git a/puppetboard/app.py b/puppetboard/app.py
index a709ed2..f236306 100644
--- a/puppetboard/app.py
+++ b/puppetboard/app.py
@@ -121,7 +121,7 @@ def bad_request(e):
 @app.errorhandler(403)
 def forbidden(e):
     envs = environments()
-    return render_template('403.html', envs=envs), 400
+    return render_template('403.html', envs=envs), 403
 
 
 @app.errorhandler(404)
diff --git a/puppetboard/templates/412.html b/puppetboard/templates/412.html
index caa0867..5b829d4 100644
--- a/puppetboard/templates/412.html
+++ b/puppetboard/templates/412.html
@@ -1,11 +1,5 @@
 {% extends 'layout.html' %}
-{% block row_fluid %}
-<div class="container" style="margin-bottom:55px;">
-  <div class="row">
-    <div class="span12">
-      <h2>Feature unavailable</h2>
-      <p>You've configured Puppetboard with an API version that does not support this feature.</p>
-    </div>
-  </div>
-</div>
+{% block content %}
+<h1>Feature unavailable</h1>
+<p>You've configured Puppetboard with an API version that does not support this feature.</p>
 {% endblock %}
diff --git a/test/test_app_error.py b/test/test_app_error.py
new file mode 100644
index 0000000..7b20d84
--- /dev/null
+++ b/test/test_app_error.py
@@ -0,0 +1,73 @@
+import pytest
+from flask import Flask, current_app
+from puppetboard import app
+
+from bs4 import BeautifulSoup
+
+
+@pytest.fixture
+def mock_puppetdb_environments(mocker):
+    environemnts = [
+        {'name': 'production'},
+        {'name': 'staging'}
+    ]
+
+    return mocker.patch.object(app.puppetdb, 'environments',
+                               return_value=environemnts)
+
+
+def test_error_no_content():
+    result = app.no_content(None)
+    assert result[0] == ''
+    assert result[1] == 204
+
+
+def test_error_bad_request(mock_puppetdb_environments):
+    with app.app.test_request_context():
+        (output, error_code) = app.bad_request(None)
+        soup = BeautifulSoup(output, 'html.parser')
+
+        assert 'The request sent to PuppetDB was invalid' in soup.p.text
+        assert error_code == 400
+
+
+def test_error_forbidden(mock_puppetdb_environments):
+    with app.app.test_request_context():
+        (output, error_code) = app.forbidden(None)
+        soup = BeautifulSoup(output, 'html.parser')
+
+        long_string = "%s %s" % ('What you were looking for has',
+                                 'been disabled by the administrator')
+        assert long_string in soup.p.text
+        assert error_code == 403
+
+
+def test_error_not_found(mock_puppetdb_environments):
+    with app.app.test_request_context():
+        (output, error_code) = app.not_found(None)
+        soup = BeautifulSoup(output, 'html.parser')
+
+        long_string = "%s %s" % ('What you were looking for could not',
+                                 'be found in PuppetDB.')
+        assert long_string in soup.p.text
+        assert error_code == 404
+
+
+def test_error_precond(mock_puppetdb_environments):
+    with app.app.test_request_context():
+        (output, error_code) = app.precond_failed(None)
+        soup = BeautifulSoup(output, 'html.parser')
+
+        long_string = "%s %s" % ('You\'ve configured Puppetboard with an API',
+                                 'version that does not support this feature.')
+        assert long_string in soup.p.text
+        assert error_code == 412
+
+
+def test_error_server(mock_puppetdb_environments):
+    with app.app.test_request_context():
+        (output, error_code) = app.server_error(None)
+        soup = BeautifulSoup(output, 'html.parser')
+
+        assert 'Internal Server Error' in soup.h2.text
+        assert error_code == 500