diff --git a/test-requirements.txt b/test-requirements.txt
index f8ae5e5c..44e66eca 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +1,5 @@
-pytest
+pytest==3.9.1
 pycodestyle
-
+pexpect
+asn1crypto
+setuptools>=61.0.0