diff --git a/tests/stochastic/test_jump.py b/tests/stochastic/test_jump.py
index 737b2c14..d3b8cf6c 100644
--- a/tests/stochastic/test_jump.py
+++ b/tests/stochastic/test_jump.py
@@ -311,7 +311,7 @@ def test_kou_jump_mean_up(self):
         jump_mean_up = 1.1
         with (
             pytest.raises(
-                ValueError,match="jump_mean_up must be postive and smaller than 1"
+                ValueError, match="jump_mean_up must be postive and smaller than 1"
             )
         ):
             generate_kou_jump(n_paths, n_steps, jump_mean_up=jump_mean_up)