     
     func nPairs(_ n: Int) async throws -> [[Any]] {
         guard let db = db else {
-            print("\(Date.now) Database reference is not existent, failed to open / create database")
+            print("\(Date.secondsSinceReferenceDate) Database reference is not existent, failed to open / create database")
             return [[]]
         }
         var pairs = [[Any]]()

        await asyncSetup()
        XCTAssertNotNil(db, "Database should not be nil")
        guard db != nil else {
            print("\(Date.now) Database reference is not existent, failed to open / create database")
            XCTFail()
            return
        }

    func testBackwardKeyEnumerations() async throws {
        await asyncSetup()
        guard let db = db else {
            print("\(Date.secondsSinceReferenceDate) Database reference is not existent, failed to open / create database")
            XCTFail()
            return
        }
