diff --git a/tests/forward_models/replace_string/test_integration.py b/tests/forward_models/replace_string/test_integration.py
index f6969634..6bf7481d 100644
--- a/tests/forward_models/replace_string/test_integration.py
+++ b/tests/forward_models/replace_string/test_integration.py
@@ -13,6 +13,7 @@
 """
 
 
+@pytest.mark.ert_integration
 @pytest.mark.parametrize(
     "input_text, replace_from, replace_to, expected",
     [
diff --git a/tests/test_ert_integration.py b/tests/test_ert_integration.py
index f4852556..0be57e0d 100644
--- a/tests/test_ert_integration.py
+++ b/tests/test_ert_integration.py
@@ -39,6 +39,7 @@ def test_console_scripts_exit_code(script_runner, entry_point, options):
     assert script_runner.run(entry_point, options).returncode != 0
 
 
+@pytest.mark.ert_integration
 @pytest.mark.parametrize(
     "forward_model, configuration, expected_error",
     [