diff --git a/tests/lib/db.php b/tests/lib/db.php
index 96d5f873b5..f0b271a36f 100644
--- a/tests/lib/db.php
+++ b/tests/lib/db.php
@@ -137,10 +137,10 @@ class Test_DB extends PHPUnit_Framework_TestCase {
 		$query = OC_DB::prepare('SELECT `fullname`, `uri`, `carddata` FROM `*PREFIX*'.$this->table2.'` WHERE `uri` = ?');
 		$result = $query->execute(array($uri));
 		$this->assertTrue((bool)$result);
-		$row = $result->fetchRow();
-		$this->assertArrayHasKey('carddata', $row);
-		$this->assertEquals($carddata, $row['carddata']);
-		$this->assertEquals(1, $result->numRows());
+		$rowset = $result->fetchAll();
+		$this->assertEquals(1, count($rowset));
+		$this->assertArrayHasKey('carddata', $rowset[0]);
+		$this->assertEquals($carddata, $rowset[0]['carddata']);
 
 		// Try to insert a new row
 		$result = OC_DB::insertIfNotExist('*PREFIX*'.$this->table2,
@@ -153,13 +153,12 @@ class Test_DB extends PHPUnit_Framework_TestCase {
 		$query = OC_DB::prepare('SELECT `fullname`, `uri`, `carddata` FROM `*PREFIX*'.$this->table2.'` WHERE `uri` = ?');
 		$result = $query->execute(array($uri));
 		$this->assertTrue((bool)$result);
-		$row = $result->fetchRow();
-		$this->assertArrayHasKey('carddata', $row);
 		// Test that previously inserted data isn't overwritten
-		$this->assertEquals($carddata, $row['carddata']);
 		// And that a new row hasn't been inserted.
-		$this->assertEquals(1, $result->numRows());
-
+		$rowset = $result->fetchAll();
+		$this->assertEquals(1, count($rowset));
+		$this->assertArrayHasKey('carddata', $rowset[0]);
+		$this->assertEquals($carddata, $rowset[0]['carddata']);
 	}
 
 	public function testUtf8Data() {
diff --git a/tests/lib/dbschema.php b/tests/lib/dbschema.php
index 7de90c047c..4a7b7f7aac 100644
--- a/tests/lib/dbschema.php
+++ b/tests/lib/dbschema.php
@@ -103,7 +103,7 @@ class Test_DBSchema extends PHPUnit_Framework_TestCase {
 				break;
 		}
 		
-		$name = $result->fetchOne(); //FIXME checking with '$result->numRows() === 1' does not seem to work?
+		$name = $result->fetchOne();
 		if ($name === $table) {
 			return true;
 		} else {
diff --git a/tests/lib/preferences.php b/tests/lib/preferences.php
index 68b794e9ea..a8236909de 100644
--- a/tests/lib/preferences.php
+++ b/tests/lib/preferences.php
@@ -101,28 +101,28 @@ class Test_Preferences extends PHPUnit_Framework_TestCase {
 		$this->assertTrue(\OC_Preferences::deleteKey('Deleteuser', 'deleteapp', 'deletekey'));
 		$query = \OC_DB::prepare('SELECT `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ? AND `appid` = ? AND `configkey` = ?');
 		$result = $query->execute(array('Deleteuser', 'deleteapp', 'deletekey'));
-		$this->assertEquals(0, $result->numRows());
+		$this->assertEquals(0, count($result->fetchAll()));
 	}
 
 	public function testDeleteApp() {
 		$this->assertTrue(\OC_Preferences::deleteApp('Deleteuser', 'deleteapp'));
 		$query = \OC_DB::prepare('SELECT `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ? AND `appid` = ?');
 		$result = $query->execute(array('Deleteuser', 'deleteapp'));
-		$this->assertEquals(0, $result->numRows());
+		$this->assertEquals(0, count($result->fetchAll()));
 	}
 
 	public function testDeleteUser() {
 		$this->assertTrue(\OC_Preferences::deleteUser('Deleteuser'));
 		$query = \OC_DB::prepare('SELECT `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?');
 		$result = $query->execute(array('Deleteuser'));
-		$this->assertEquals(0, $result->numRows());
+		$this->assertEquals(0, count($result->fetchAll()));
 	}
 
 	public function testDeleteAppFromAllUsers() {
 		$this->assertTrue(\OC_Preferences::deleteAppFromAllUsers('someapp'));
 		$query = \OC_DB::prepare('SELECT `configvalue` FROM `*PREFIX*preferences` WHERE `appid` = ?');
 		$result = $query->execute(array('someapp'));
-		$this->assertEquals(0, $result->numRows());
+		$this->assertEquals(0, count($result->fetchAll()));
 	}
 }