diff --git a/test-requirements.txt b/test-requirements.txt
index 500eec70..6b4e5084 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,3 +9,6 @@ os-testr
 
 # for computable inputs
 lupa
+
+# to test if everything works on gevent
+gevent