diff --git a/tests/test_requirements.txt b/tests/test_requirements.txt
index 2c1ebbb..3330107 100644
--- a/tests/test_requirements.txt
+++ b/tests/test_requirements.txt
@@ -2,3 +2,4 @@ mock==2.0.0
 pymongo==3.0.1
 pytest==3.0.3
 responses==0.5.0
+pyasn1==0.2.3