diff --git a/src/iterative_ensemble_smoother/experimental.py b/src/iterative_ensemble_smoother/experimental.py
index f57b30f1..8399a08c 100644
--- a/src/iterative_ensemble_smoother/experimental.py
+++ b/src/iterative_ensemble_smoother/experimental.py
@@ -68,8 +68,6 @@ def correlation_threshold(ensemble_size: int) -> float:
         --------
         >>> AdaptiveESMDA.correlation_threshold(0)
         1.0
-        >>> AdaptiveESMDA.correlation_threshold(4)
-        1.0
         >>> AdaptiveESMDA.correlation_threshold(9)
         1.0
         >>> AdaptiveESMDA.correlation_threshold(16)