diff --git a/tests/PHPUnit/Fixture.php b/tests/PHPUnit/Fixture.php
index 24cc9782ef034a83959579074e7d93a147b6ca04..cde82728f5f6ac4a96d45b0e800176c1183d4194 100644
--- a/tests/PHPUnit/Fixture.php
+++ b/tests/PHPUnit/Fixture.php
@@ -295,7 +295,7 @@ class Fixture extends PHPUnit_Framework_Assert
 
         // Manually set the website creation date to a day earlier than the earliest day we record stats for
         Db::get()->update(Common::prefixTable("site"),
-            array('ts_created' => Date::factory($dateTime)->subDay(30)->getDatetime()),
+            array('ts_created' => Date::factory($dateTime)->subDay(1)->getDatetime()),
             "idsite = $idSite"
         );
 
diff --git a/tests/PHPUnit/Fixtures/UITestFixture.php b/tests/PHPUnit/Fixtures/UITestFixture.php
index 4b6d22fcd3c616d9a367fd3a7365ae5c5fdbede9..4c70599fffa317ee2d53ecdb8596af929d270745 100644
--- a/tests/PHPUnit/Fixtures/UITestFixture.php
+++ b/tests/PHPUnit/Fixtures/UITestFixture.php
@@ -28,6 +28,12 @@ class UITestFixture extends OmniFixture
     {
         parent::setUp();
 
+        // make sure site has an early enough creation date (for period selector tests)
+        Db::get()->update(Common::prefixTable("site"),
+            array('ts_created' => '2011-01-01'),
+            "idsite = 1"
+        );
+
         $this->addOverlayVisits();
         $this->addNewSitesForSiteSelector();
         $this->createEmptyDashboard();