Ethereum core developers announced a delay in plans to launch Constantinople, ethereum's upcoming system-wide upgrade, on the test network.
Ethereum developers have confirmed an upcoming upgrade will activate on Ropsten around October 9.
Ethereum developers say Constantinople may be subject to delays following Saturday's test network release.
A version of the ethereum blockchain being used by developers to test a forthcoming network upgrade is under an ongoing spam attack.
The testing of a forthcoming ethereum upgrade is now underway, with the process expected to last up to three weeks.