diff --git a/spec/README.md b/spec/README.md
index a1464bfb..4da194b6 100644
--- a/spec/README.md
+++ b/spec/README.md
@@ -14,7 +14,7 @@ To run one set of tests:
 npm test spec/basic.tests.spec.js
 ```
 
-By default the zip tests only run on manifest files which have changed.
+By default the **zip** tests only run on manifest files which have changed.
 
 To force the zip tests to run for certain manifest files:
 ```