diff --git a/pyproject.toml b/pyproject.toml
index cce4b6e..52f50ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ dev = [
     "nox",
 ]
 testing = [
-    # "bmi-tester>=0.5.7",
+    "bmi-tester>=0.5.7",
     "coveralls",
     "pytest",
     "pytest-cov",