diff --git a/README.md b/README.md
index 7d304b7..e40182c 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ The following assumes that the Firedrake virtual environment is already activate
 
 Test with
 
-    python3 -m pytest sapphire/
+    python3 -m pytest sapphire/tests/
 
 Install with