diff --git a/chi/tests/test_predictive_models.py b/chi/tests/test_predictive_models.py
index 61826c16..029a9c3c 100644
--- a/chi/tests/test_predictive_models.py
+++ b/chi/tests/test_predictive_models.py
@@ -1700,6 +1700,23 @@ def test_sample_bad_input(self):
         with self.assertRaisesRegex(ValueError, 'The length of parameters'):
             self.model.sample(parameters, times)
 
+        # Raises error when number of covariates and does not match model
+        seed = 100
+        times = [1, 2, 3, 4, 5]
+        parameters = [1, 1, 1, 1, 1, 1, 1, 0.1, 0.1, 2, 3]
+        covariates = [1.3, 2.4, 1]
+        with self.assertRaisesRegex(ValueError, 'Provided covariates do not'):
+            self.model2.sample(
+                parameters, times, seed=seed, covariates=covariates)
+
+        # Raises error when the covariates per sample do not match n_samples
+        n_samples = 3
+        covariates = np.ones(shape=(5, 2))
+        with self.assertRaisesRegex(ValueError, 'Provided covariates cannot'):
+            self.model2.sample(
+                parameters, times, seed=seed, covariates=covariates,
+                n_samples=n_samples)
+
 
 class TestPriorPredictiveModel(unittest.TestCase):
     """