diff --git a/pyproject.toml b/pyproject.toml
index 1567e82..ac72ea8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ classifiers = [
 dependencies = []
 
 [project.optional-dependencies]
-dev = ["black", "isort", "coverage", "pylint", "pytest", "pytest-random-order"]
+dev = ["black", "isort", "coverage", "pylint", "pytest", "pytest-random-order", "ophyd_devices"]
 
 [project.entry-points."bec"]
 plugin_bec = "tomcat_bec"