         // END
         
         assertNoError {
-            dbConfiguration.trace = { print($0) }
             do {
                 let dbQueue = try makeDatabaseQueue(filename: "test.sqlite")
                 try dbQueue.inDatabase { db in

        }
    }
    
    func testConcurrentRead() {
        assertNoError {
            let dbPool = try makeDatabasePool()

        }
    }
    
    func testReadFromCurrentStateOpensATransaction() {
        assertNoError {
            let dbPool = try makeDatabasePool()
            let s = DispatchSemaphore(value: 0)
            try dbPool.write { db in
                try dbPool.readFromCurrentState { db in
                    XCTAssertTrue(db.isInsideTransaction)
                    do {
                        try db.execute("BEGIN DEFERRED TRANSACTION")
                        XCTFail("Expected error")
                    } catch {
                    }
                    s.signal()
                }
            }
            _ = s.wait(timeout: .distantFuture)
        }
    }
    
    func testReadFromCurrentStateOutsideOfTransaction() {
        assertNoError {
            let dbPool = try makeDatabasePool()
            try dbPool.write { db in
                try db.create(table: "persons") { t in
