# Where are all the testnet contract addresses?

**URL:** <https://gov.yearn.fi/t/where-are-all-the-testnet-contract-addresses/10253>\
**Category:** Technical Discussion\
**Created:** [26 March 2021 15:05 UTC](https://gov.yearn.fi/t/where-are-all-the-testnet-contract-addresses/10253 "2021-03-26T15:05:58Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![barnyard](https://avatars.discourse-cdn.com/v4/letter/b/ec9cab/32.png) [@barnyard](https://gov.yearn.fi/u/barnyard)\
**Post date:** [26 March 2021 15:05 UTC](https://gov.yearn.fi/t/where-are-all-the-testnet-contract-addresses/10253/1 "2021-03-26T15:05:58Z")

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I have looked on Github, the Yearn docs, Etherscan and a few other places to find all of the Yearn core contracts on the Ethereum testnet (ropsten, kovan etc). I can’t seem to find where these contracts are all tested? Could someone please point me in the right direction 🙂

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**Author:** ![Deepcryptodive](https://avatars.discourse-cdn.com/v4/letter/d/4da419/32.png) [@Deepcryptodive](https://gov.yearn.fi/u/Deepcryptodive)\
**Post date:** [26 March 2021 17:26 UTC](https://gov.yearn.fi/t/where-are-all-the-testnet-contract-addresses/10253/2 "2021-03-26T17:26:39Z")

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I was under the impression most testing actually took place using a fork of mainnet.

E.g. [Forking Ethereum mainnet with Ganache CLI – Chainstack Support](https://support.chainstack.com/hc/en-us/articles/900001783063-Forking-Ethereum-mainnet-with-Ganache-CLI)  
[https://medium.com/@samajammin/how-to-interact-with-ethereums-mainnet-in-a-development-environment-with-ganache-3d8649df0876](https://medium.com/@samajammin/how-to-interact-with-ethereums-mainnet-in-a-development-environment-with-ganache-3d8649df0876)

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**Author:** ![barnyard](https://avatars.discourse-cdn.com/v4/letter/b/ec9cab/32.png) [@barnyard](https://gov.yearn.fi/u/barnyard)\
**Post date:** [26 March 2021 17:37 UTC](https://gov.yearn.fi/t/where-are-all-the-testnet-contract-addresses/10253/3 "2021-03-26T17:37:11Z")

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Ok thank you, I think my question was too vague. I am wondering how exactly vaults are tested against other DeFi platforms for things such as strategy development.

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**Author:** ![system](https://europe1.discourse-cdn.com/flex013/uploads/yearn/original/2X/9/9ae7183c96201b2e9a60ad06d0d7664a3e90aeb0.png) [@system](https://gov.yearn.fi/u/system)\
**Post date:** [2 April 2021 17:37 UTC](https://gov.yearn.fi/t/where-are-all-the-testnet-contract-addresses/10253/4 "2021-04-02T17:37:12Z")

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