diff --git a/Code-Style.md b/Code-Style.md
index 93e24be..a0f8dbf 100644
--- a/Code-Style.md
+++ b/Code-Style.md
@@ -321,6 +321,10 @@ The following are additional general rules to apply when writing Javadoc:
 
 Each test class must end with a `Tests` suffix.
 
+### Assertions
+
+Use AssertJ for assertions.
+
 ### Mocking
 
 Use the BDD Mockito support.
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