tests: sync global configuration with NFD

Change-Id: I29fafbf63300d65c967958f48123ea888d14b9b2
Refs: #4255
diff --git a/tests/README.md b/tests/README.md
index ddcd0c5..83cab77 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -1,5 +1,5 @@
-ndn-tool unit tests
-===================
+ndn-tools unit tests
+====================
 
 ## Assumptions