diff --git a/tests/test_models.py b/tests/test_models.py
index 488c301..8c105f1 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -272,7 +272,7 @@ def test_linear_regression(intercept, slope, sigma) -> None:
         beta=10,
     )
 
-    posterior = linear_regression(X, y, prior=prior)
+    posterior = linear_regression(X=X, y=y, prior=prior)
 
     beta_samples, variance_samples = posterior.sample_beta(
         size=500, return_variance=True, random_state=rng