diff --git a/src/pyinterp/tests/core/test_interpolate1d.py b/src/pyinterp/tests/core/test_interpolate1d.py
index 12a03d49..c6dd86b9 100644
--- a/src/pyinterp/tests/core/test_interpolate1d.py
+++ b/src/pyinterp/tests/core/test_interpolate1d.py
@@ -17,5 +17,5 @@ def test_interpolate1d():
 
     assert pytest.approx(numpy.cos(-x**2 / 9.0), rel=1e-6) == yi[index]
 
-    with pytest.raises(RuntimeError):
+    with pytest.raises(ValueError):
         core.interpolate1d(core.Axis(x), y, xi, half_window_size=0)