diff --git a/pyproject.toml b/pyproject.toml
index b23d100152f23d7884e48d12e9e4813f65eb14fd..7b8aaa264b9e5f5b456584490612dbfb74ddc116 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,6 +36,9 @@ graphql-core = "^3.1.2"
 websocket-client = "^0.57"
 
 [tool.poetry.dev-dependencies]
+pytest = "^6.2.3"
+pytest-cov = "^2.12.0"
+pytest-sugar = "^0.9.4"
 black = {version = "^21.4b2", allow-prereleases = true}
 mypy = "^0.790"
 pylint = "^2.7.2"