diff --git a/package/samplers/ctpe/components.py b/package/samplers/ctpe/components.py
index 71a8d6d1..c2018d4f 100644
--- a/package/samplers/ctpe/components.py
+++ b/package/samplers/ctpe/components.py
@@ -18,7 +18,7 @@ def __call__(self, x: int) -> int:
         elif self._strategy == "sqrt":
             n = int(np.ceil(self._beta * np.sqrt(x)))
         else:
-            assert "Should not reach."
+            assert False, "Should not reach."
 
         return min(n, 25)
 
@@ -45,4 +45,4 @@ def __call__(self, x: int) -> np.ndarray:
             weights[:-25] = 1e-12
             return weights
         else:
-            assert "Should not reach."
+            assert False, "Should not reach."