diff --git a/tests/README.md b/tests/README.md
index d58ddf8..891b975 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -1,6 +1,6 @@
## tests in solidity
-### tl; dr
+
#### assert vs. require
@@ -8,7 +8,7 @@
* Require() should be used to ensure valid conditions are met that cannot be detected until execution time.
* You may optionally provide a message for require, but not for assert.
-
+
#### unit testing
@@ -27,6 +27,7 @@
### resources
+
* [how to mock solidity contracts](https://ethereum.org/en/developers/tutorials/how-to-mock-solidity-contracts-for-testing/)
* [truffle smart contract test framework](https://ethereum.org/en/developers/tutorials/how-to-mock-solidity-contracts-for-testing/)