diff --git a/requirements.txt b/requirements.txt
index 6d900998..e9865975 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,4 +10,5 @@ pandas>=0.25.3
 torch>=1.1.0
 sphinx-tabs
 pymc>=5.1.0
-arviz==0.13.0
\ No newline at end of file
+arviz==0.13.0
+pytest
\ No newline at end of file