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@@ -38,6 +38,12 @@ Or whatever version your `@chainlink` and `@openzeppelin` contracts need. For ex
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## Integration Testing Issues
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- In some integration tests, we do something like `time.sleep(60)`. Sometimes, you'll have to do much longer, we've had reports go up to `time.sleep(300)`. So, if you want to try that, go get a coffee break while your integration test runs!
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## Python related issues
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- In some environments Web3.py may not work due to the **Cytools** error, which means your computer lacks some `C` language libraries in order to execute.
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[Here](https://medium.com/@cromewar/the-mighty-cytools-error-at-web3-smart-contract-development-with-brownie-63335d50f230) you can find a detailed guide about how to solve the problem.
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## Lesson 3:
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-[2:37:05](https://youtu.be/M576WGiDBdQ?t=9425) Kovan vs Rinkeby
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- Our `FundMe.sol` needs to be deployed to the *rinkeby* chain to work, but if you go to try the price feeds from the Chainlink docs using the remix link, that one has the *kovan* price feeds in it, so needs to be deployed to kovan.
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