diff --git a/tests/model/DbDatetimeTest.php b/tests/model/DbDatetimeTest.php
index add4c1c27..31ce19dfe 100644
--- a/tests/model/DbDatetimeTest.php
+++ b/tests/model/DbDatetimeTest.php
@@ -54,8 +54,8 @@ class DbDatetimeTest extends FunctionalTest {
 
 	function testCorrectNow() {
 		if($this->supportDbDatetime) {
-			$query = new SQLQuery($this->adapter->formattedDatetimeClause('now', '%U'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->formattedDatetimeClause('now', '%U');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->assertRegExp('/^\d*$/', (string) $result);
 			$this->assertTrue($result>0);
 		}
@@ -63,17 +63,16 @@ class DbDatetimeTest extends FunctionalTest {
 
 	function testDbDatetimeFormat() {
 		if($this->supportDbDatetime) {
-			$query = new SQLQuery($this->adapter->formattedDatetimeClause('1973-10-14 10:30:00', '%H:%i, %d/%m/%Y'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->formattedDatetimeClause('1973-10-14 10:30:00', '%H:%i, %d/%m/%Y');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, date('H:i, d/m/Y', strtotime('1973-10-14 10:30:00')), 'nice literal time');
 
-			$query = new SQLQuery($this->adapter->formattedDatetimeClause('now', '%d'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->formattedDatetimeClause('now', '%d');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, date('d', $this->getDbNow()), 'todays day');
 
-			$query = new SQLQuery($this->adapter->formattedDatetimeClause('"Created"', '%U') . ' AS test FROM "DbDateTimeTest_Team"');
-			$result = $query->execute()->value();
-
+			$clause = $this->adapter->formattedDatetimeClause('"Created"', '%U') . ' AS test FROM "DbDateTimeTest_Team"';
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, strtotime(DataObject::get_one('DbDateTimeTest_Team')->Created), 'fixture ->Created as timestamp');
 		}
 	}
@@ -81,12 +80,12 @@ class DbDatetimeTest extends FunctionalTest {
 	function testDbDatetimeInterval() {
 		if($this->supportDbDatetime) {
 
-			$query = new SQLQuery($this->adapter->datetimeIntervalClause('1973-10-14 10:30:00', '+18 Years'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->datetimeIntervalClause('1973-10-14 10:30:00', '+18 Years');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, '1991-10-14 10:30:00', 'add 18 years');
 
-			$query = new SQLQuery($this->adapter->datetimeIntervalClause('now', '+1 Day'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->datetimeIntervalClause('now', '+1 Day');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, date('Y-m-d H:i:s', strtotime('+1 Day', $this->getDbNow())), 'tomorrow');
 
 			$query = new SQLQuery();
@@ -102,16 +101,16 @@ class DbDatetimeTest extends FunctionalTest {
 	function testDbDatetimeDifference() {
 		if($this->supportDbDatetime) {
 
-			$query = new SQLQuery($this->adapter->datetimeDifferenceClause('1974-10-14 10:30:00', '1973-10-14 10:30:00'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->datetimeDifferenceClause('1974-10-14 10:30:00', '1973-10-14 10:30:00');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result/86400, 365, '1974 - 1973 = 365 * 86400 sec');
 
-			$query = new SQLQuery($this->adapter->datetimeDifferenceClause(date('Y-m-d H:i:s', strtotime('-15 seconds')), 'now'));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->datetimeDifferenceClause(date('Y-m-d H:i:s', strtotime('-15 seconds')), 'now');
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, -15, '15 seconds ago - now');
 
-			$query = new SQLQuery($this->adapter->datetimeDifferenceClause('now', $this->adapter->datetimeIntervalClause('now', '+45 Minutes')));
-			$result = $query->execute()->value();
+			$clause = $this->adapter->datetimeDifferenceClause('now', $this->adapter->datetimeIntervalClause('now', '+45 Minutes'));
+			$result = DB::query('SELECT ' . $clause)->value();
 			$this->matchesRoughly($result, -45 * 60, 'now - 45 minutes ahead');
 
 			$query = new SQLQuery();