diff --git a/pyproject.toml b/pyproject.toml
index a44591e1e861b5262e47b03392d129e855098b84..df2ee2190aeefe3e06fc139d5cf07b41ef356164 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ websocket-client = "^0.57"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.3"
+pytest-cov = "^2.12.0"
 black = {version = "^21.4b2", allow-prereleases = true}
 mypy = "^0.790"
 pylint = "^2.7.2"