Forgot to add twig file.

plugins/Installation/templates/cannotConnectToDb.twig

+<p>{{ 'Installation_CannotConnectToDb'|translate }}:</p>
+
+<p><strong>{{ exceptionMessage }}</strong></p>
+
+<p>{{ 'Installation_CannotConnectToDbResolvingExplanation'|translate('<a href="javascript:window.location.reload()">', '</a>')|raw }}</p>
\ No newline at end of file

tests/PHPUnit/Integration/LabelFilterTest.php

@@ -9,6 +9,8 @@
 /**
  * Tests the class LabelFilter.
  * This is not possible as unit test, since it loads data from the archive.
+ *
+ * @group LabelFilterTest
  */
 class Test_Piwik_Integration_LabelFilter extends IntegrationTestCase
 {