diff --git a/README b/README
new file mode 100644
index 0000000..56dc989
--- /dev/null
+++ b/README
@@ -0,0 +1,8 @@
+Experimental support for greenlets in Tulip (PEP 3156).
+
+Requires Tulip, greenlet and Python 3.3.
+
+See examples and unittests for details.
+To run tests: "$ python3 runtests.py"
+
+License: Apache 2.0
diff --git a/runtests.py b/runtests.py
index cd33442..f3af4c8 100644
--- a/runtests.py
+++ b/runtests.py
@@ -1,3 +1,6 @@
+# Copied from Tulip codebase, covered by Apache 2.0 License
+#
+
 """Run all unittests.
 
 Usage: