diff --git a/test/test_classes.php b/test/test_classes.php
index 6af1a760..e912f018 100644
--- a/test/test_classes.php
+++ b/test/test_classes.php
@@ -80,6 +80,44 @@ public function prepare($statement, $driver_options = array()) {
         }
     }
 
+    /**
+     * Another mock PDOStatement class, for testing multiple connections
+     */
+    class DummyDifferentPDOStatement extends PDOStatement {
+
+        private $current_row = 0;
+        /**
+         * Return some dummy data
+         */
+        public function fetch(
+            $fetch_style = PDO::FETCH_BOTH,
+            $cursor_orientation = PDO::FETCH_ORI_NEXT,
+            $cursor_offset = 0
+        ) {
+            if ($this->current_row == 5) {
+                return false;
+            } else {
+                $this->current_row++;
+                return array('name' => 'Steve', 'age' => 80, 'id' => "{$this->current_row}");
+            }
+        }
+    }
+
+    /**
+     * A different mock database class, for testing multiple connections
+     * Mock database class implementing a subset of the PDO API.
+     */
+    class DummyDifferentPDO extends PDO {
+
+        /**
+         * Return a dummy PDO statement
+         */
+        public function prepare($statement, $driver_options = array()) {
+            $this->last_query = new DummyDifferentPDOStatement($statement);
+            return $this->last_query;
+        }
+    }
+
     /**
      *
      * Class to provide simple testing functionality