diff --git a/tests/unit_tests/analysis/test_es_update.py b/tests/unit_tests/analysis/test_es_update.py
index b58992b600c..c7ad734dabf 100644
--- a/tests/unit_tests/analysis/test_es_update.py
+++ b/tests/unit_tests/analysis/test_es_update.py
@@ -504,7 +504,7 @@ def test_update_multiple_param(copy_case):
 def test_correlated_parameter_response_pair():
     p = 4
     m = 2
-    N = 1000
+    N = 2000
     rho = 0.9
     # Correlation matrix or AR(1) model
     R = toeplitz([rho**i for i in range(p + m)])