diff --git a/tests/ert/performance_tests/test_obs_and_responses_performance.py b/tests/ert/performance_tests/test_obs_and_responses_performance.py
index cddf5612fb4..9cf4ec90cee 100644
--- a/tests/ert/performance_tests/test_obs_and_responses_performance.py
+++ b/tests/ert/performance_tests/test_obs_and_responses_performance.py
@@ -258,7 +258,6 @@ class _Benchmark:
         ),
         expected_join_performance=_ExpectedPerformance(
             memory_limit_mb=100,
-            last_measured_time=0.03,
             last_measured_memory_mb=17,
         ),
         expected_update_performance=_ExpectedPerformance(