diff --git a/Running-Unit-Tests.md b/Running-Unit-Tests.md
index ddfa63b..9388c3b 100644
--- a/Running-Unit-Tests.md
+++ b/Running-Unit-Tests.md
@@ -26,7 +26,7 @@ There are a few ways to run the tests:
   UnitTests
   ```
 
-## Running tests on CMake-based systems (Linux / OS X)
+## Running tests on CMake-based systems (Linux / macOS)
 ---
 
 Use the `unittests` build target: