Updated README

README.md

@@ -10,8 +10,6 @@ Install the library in an existing Truffle project:
 npm install --save-dev truffle-migrate-off-chain
 ```
 
-The `Migrations.sol` contract can be removed because it is no longer needed.
-
 # Usage
 
 To run your migrations call the command:
@@ -83,6 +81,8 @@ The key here is that the Truffle build artifact network addresses are derived fr
 
 - It's currently built against Truffle 4.1.5, but it's likely that it will work with older versions of Truffle as well.  If you want to test it and submit a PR that would be fantastic!
 
+- You still need to keep the `Migrations.sol` contract and migration around so that the `truffle test` command works.
+
 # License
 
 Note that this project borrows code heavily from `truffle-migrate` and `truffle-core`.  This code is similarly licensed under the MIT license.