diff --git a/web/gui/src/main/webapp/tests/README.txt b/web/gui/src/main/webapp/tests/README.txt
index 6cd2255..54830ab 100644
--- a/web/gui/src/main/webapp/tests/README.txt
+++ b/web/gui/src/main/webapp/tests/README.txt
@@ -1 +1,7 @@
 # Unit and integration tests for code under the /app directory
+
+To run these tests, karma, node.js etc needs to be installed in the
+build environment.
+
+[Details to follow]
+