diff --git a/tests/cache/apc_driver_test.php b/tests/cache/apc_driver_test.php
index c8b8f82b67..3380762878 100644
--- a/tests/cache/apc_driver_test.php
+++ b/tests/cache/apc_driver_test.php
@@ -50,42 +50,4 @@ class phpbb_cache_apc_driver_test extends phpbb_cache_common_test_case
 		$this->driver = new phpbb_cache_driver_apc;
 		$this->driver->purge();
 	}
-
-	public function test_cache_sql()
-	{
-		global $db, $cache;
-		$db = $this->new_dbal();
-		$cache = new phpbb_cache_service($this->driver);
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-
-		$key = $this->driver->key_prefix . 'sql_' . md5(preg_replace('/[\n\r\s\t]+/', ' ', $sql));
-		$this->assertFalse(apc_fetch($key));
-
-		$result = $db->sql_query($sql, 300);
-		$first_result = $db->sql_fetchrow($result);
-		$expected = array('config_name' => 'foo', 'config_value' => '23', 'is_dynamic' => 0);
-		$this->assertEquals($expected, $first_result);
-
-		$this->assertTrue((bool) apc_fetch($key));
-
-		$sql = 'DELETE FROM phpbb_config';
-		$result = $db->sql_query($sql);
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-		$result = $db->sql_query($sql, 300);
-
-		$this->assertEquals($expected, $db->sql_fetchrow($result));
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-		$result = $db->sql_query($sql);
-
-		$no_cache_result = $db->sql_fetchrow($result);
-		$this->assertSame(false, $no_cache_result);
-
-		$db->sql_close();
-	}
 }
diff --git a/tests/cache/common_test_case.php b/tests/cache/common_test_case.php
index 45cf80e424..fa298ec9ae 100644
--- a/tests/cache/common_test_case.php
+++ b/tests/cache/common_test_case.php
@@ -61,4 +61,37 @@ abstract class phpbb_cache_common_test_case extends phpbb_database_test_case
 			$this->driver->get('second_key')
 		);
 	}
+
+	public function test_cache_sql()
+	{
+		global $db, $cache;
+		$db = $this->new_dbal();
+		$cache = new phpbb_cache_service($this->driver);
+
+		$sql = "SELECT * FROM phpbb_config
+			WHERE config_name = 'foo'";
+
+		$result = $db->sql_query($sql, 300);
+		$first_result = $db->sql_fetchrow($result);
+		$expected = array('config_name' => 'foo', 'config_value' => '23', 'is_dynamic' => 0);
+		$this->assertEquals($expected, $first_result);
+
+		$sql = 'DELETE FROM phpbb_config';
+		$result = $db->sql_query($sql);
+
+		$sql = "SELECT * FROM phpbb_config
+			WHERE config_name = 'foo'";
+		$result = $db->sql_query($sql, 300);
+
+		$this->assertEquals($expected, $db->sql_fetchrow($result));
+
+		$sql = "SELECT * FROM phpbb_config
+			WHERE config_name = 'foo'";
+		$result = $db->sql_query($sql);
+
+		$no_cache_result = $db->sql_fetchrow($result);
+		$this->assertSame(false, $no_cache_result);
+
+		$db->sql_close();
+	}
 }
diff --git a/tests/cache/file_driver_test.php b/tests/cache/file_driver_test.php
index 2353940277..745c6bb081 100644
--- a/tests/cache/file_driver_test.php
+++ b/tests/cache/file_driver_test.php
@@ -66,42 +66,4 @@ class phpbb_cache_file_driver_test extends phpbb_cache_common_test_case
 		}
 		rmdir($this->cache_dir);
 	}
-
-	public function test_cache_sql()
-	{
-		global $db, $cache;
-		$db = $this->new_dbal();
-		$cache = new phpbb_cache_service($this->driver);
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-
-		$cache_path = $this->cache_dir . 'sql_' . md5(preg_replace('/[\n\r\s\t]+/', ' ', $sql)) . '.php';
-		$this->assertFileNotExists($cache_path);
-
-		$result = $db->sql_query($sql, 300);
-		$first_result = $db->sql_fetchrow($result);
-		$expected = array('config_name' => 'foo', 'config_value' => '23', 'is_dynamic' => 0);
-		$this->assertEquals($expected, $first_result);
-
-		$this->assertFileExists($cache_path);
-
-		$sql = 'DELETE FROM phpbb_config';
-		$result = $db->sql_query($sql);
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-		$result = $db->sql_query($sql, 300);
-
-		$this->assertEquals($expected, $db->sql_fetchrow($result));
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-		$result = $db->sql_query($sql);
-
-		$no_cache_result = $db->sql_fetchrow($result);
-		$this->assertSame(false, $no_cache_result);
-
-		$db->sql_close();
-	}
 }
diff --git a/tests/cache/redis_driver_test.php b/tests/cache/redis_driver_test.php
index a90a750460..1308519a18 100644
--- a/tests/cache/redis_driver_test.php
+++ b/tests/cache/redis_driver_test.php
@@ -46,46 +46,4 @@ class phpbb_cache_redis_driver_test extends phpbb_cache_common_test_case
 		$this->driver = new phpbb_cache_driver_redis(self::$config['host'], self::$config['port']);
 		$this->driver->purge();
 	}
-
-	public function test_cache_sql()
-	{
-		global $db, $cache;
-		$db = $this->new_dbal();
-		$cache = new phpbb_cache_service($this->driver);
-
-		$redis = new Redis();
-		$ok = $redis->connect(self::$config['host'], self::$config['port']);
-		$this->assertTrue($ok);
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-
-		$key = $this->driver->key_prefix . 'sql_' . md5(preg_replace('/[\n\r\s\t]+/', ' ', $sql));
-		$this->assertFalse($redis->exists($key));
-
-		$result = $db->sql_query($sql, 300);
-		$first_result = $db->sql_fetchrow($result);
-		$expected = array('config_name' => 'foo', 'config_value' => '23', 'is_dynamic' => 0);
-		$this->assertEquals($expected, $first_result);
-
-		$this->assertTrue($redis->exists($key));
-
-		$sql = 'DELETE FROM phpbb_config';
-		$result = $db->sql_query($sql);
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-		$result = $db->sql_query($sql, 300);
-
-		$this->assertEquals($expected, $db->sql_fetchrow($result));
-
-		$sql = "SELECT * FROM phpbb_config
-			WHERE config_name = 'foo'";
-		$result = $db->sql_query($sql);
-
-		$no_cache_result = $db->sql_fetchrow($result);
-		$this->assertSame(false, $no_cache_result);
-
-		$db->sql_close();
-	}
 }