diff --git a/README.md b/README.md
index 2fc9605..6640918 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,13 @@
 # acid
 
 Tests to identify faults and incorrect behavior in the Redox microkernel.
+
+### Tests
+
+- `acid switch` - test to see the context switch time (500/500 for P/C acronyms).
+
+P - Parent context switch count (500 by deafult)
+C - Child context switch count (500 by deafult)
+T - Timestamp counter difference
+
+(timestamp counter is not reliable on every system).