diff --git a/README.md b/README.md
index e731e5f..0ad06a8 100644
--- a/README.md
+++ b/README.md
@@ -336,7 +336,9 @@
 
 ## Running the tests
 
-The tests are all built from the tests/ directory.
+The tests are all built from the tests/ directory. There is a separate
+directory `benchmarks/` containing benchmarks, and that has its own
+documentation on [running the benchmarks](benchmarks/README.md).
 
 ### Device tests