diff --git a/setup.py b/setup.py
index de7d6874..024faf27 100755
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@
     ],
     install_requires=[
         "ecl",
-        "ert>=5.0.1",
+        "ert>=5.1.0-b3",
         "configsuite>=0.6",
         "numpy",
         "pandas>1.3.0",
diff --git a/tests/jobs/localisation/snapshots/test_integration/test_localisation/obs_group_add0-param_group_add0/localisation_configuration b/tests/jobs/localisation/snapshots/test_integration/test_localisation/obs_group_add0-param_group_add0/localisation_configuration
index 04544794..366c4c84 100644
--- a/tests/jobs/localisation/snapshots/test_integration/test_localisation/obs_group_add0-param_group_add0/localisation_configuration
+++ b/tests/jobs/localisation/snapshots/test_integration/test_localisation/obs_group_add0-param_group_add0/localisation_configuration
@@ -1 +1 @@
-{'update_steps': [{'name': 'CORR1', 'observations': [{'name': 'WOPR_OP1_108', 'index_list': []}, {'name': 'WOPR_OP1_144', 'index_list': []}, {'name': 'WOPR_OP1_36', 'index_list': []}, {'name': 'WOPR_OP1_72', 'index_list': []}, {'name': 'WOPR_OP1_9', 'index_list': []}, {'name': 'WPR_DIFF_1', 'index_list': []}], 'parameters': [Parameter(name='SNAKE_OIL_PARAM', index_list=[0])], 'row_scaling_parameters': []}, {'name': 'CORR2', 'observations': [{'name': 'WOPR_OP1_108', 'index_list': []}, {'name': 'WOPR_OP1_144', 'index_list': []}, {'name': 'WOPR_OP1_36', 'index_list': []}, {'name': 'WOPR_OP1_72', 'index_list': []}, {'name': 'WOPR_OP1_9', 'index_list': []}, {'name': 'WPR_DIFF_1', 'index_list': []}], 'parameters': [Parameter(name='SNAKE_OIL_PARAM', index_list=[9 8 2 1 3 6 5 7 4])], 'row_scaling_parameters': []}, {'name': 'CORR3', 'observations': [{'name': 'FOPR', 'index_list': []}, {'name': 'WOPR_OP1_190', 'index_list': []}], 'parameters': [Parameter(name='SNAKE_OIL_PARAM', index_list=[2 3])], 'row_scaling_parameters': []}]}
\ No newline at end of file
+{'update_steps': [{'name': 'CORR1', 'observations': [{'name': 'WOPR_OP1_108', 'index_list': []}, {'name': 'WOPR_OP1_144', 'index_list': []}, {'name': 'WOPR_OP1_36', 'index_list': []}, {'name': 'WOPR_OP1_72', 'index_list': []}, {'name': 'WOPR_OP1_9', 'index_list': []}, {'name': 'WPR_DIFF_1', 'index_list': []}], 'parameters': [Parameter(name='SNAKE_OIL_PARAM', index_list=[0])], 'row_scaling_parameters': []}, {'name': 'CORR2', 'observations': [{'name': 'WOPR_OP1_108', 'index_list': []}, {'name': 'WOPR_OP1_144', 'index_list': []}, {'name': 'WOPR_OP1_36', 'index_list': []}, {'name': 'WOPR_OP1_72', 'index_list': []}, {'name': 'WOPR_OP1_9', 'index_list': []}, {'name': 'WPR_DIFF_1', 'index_list': []}], 'parameters': [Parameter(name='SNAKE_OIL_PARAM', index_list=[9, 8, 2, 1, 3, 6, 5, 7, 4])], 'row_scaling_parameters': []}, {'name': 'CORR3', 'observations': [{'name': 'FOPR', 'index_list': []}, {'name': 'WOPR_OP1_190', 'index_list': []}], 'parameters': [Parameter(name='SNAKE_OIL_PARAM', index_list=[2, 3])], 'row_scaling_parameters': []}]}
\ No newline at end of file