diff --git a/kepler/.coverage b/kepler/.coverage
new file mode 100644
index 0000000..9b9d1a8
Binary files /dev/null and b/kepler/.coverage differ
diff --git a/kepler/pyproject.toml b/kepler/pyproject.toml
index 3b3da6f..30fc3cd 100644
--- a/kepler/pyproject.toml
+++ b/kepler/pyproject.toml
@@ -58,6 +58,8 @@ show_missing = true
 [tool.pytest.ini_options]
 minversion = "6.0"
 log_cli_level = "INFO"
+# Retain INFO logs in the "Captured log call" section when run interactively.
+log_level = "INFO"
 
 # Linting tools configuration
 [tool.ruff]
diff --git a/kepler/tests/integration/test_charm.py b/kepler/tests/integration/test_charm.py
index f3852e5..62d61fa 100644
--- a/kepler/tests/integration/test_charm.py
+++ b/kepler/tests/integration/test_charm.py
@@ -39,3 +39,22 @@ def test_deploy(charm: pathlib.Path, juju: jubilant.Juju):
     }
     juju.deploy(charm, app=APP_NAME, resources=resources)
     juju.wait(jubilant.all_active)
+
+
+def test_jubilant_info_logs_captured(
+    charm: pathlib.Path, juju: jubilant.Juju, caplog: pytest.LogCaptureFixture
+):
+    """Jubilant's INFO logs must be retained in pytest's captured-log section."""
+    juju.wait(jubilant.all_active)
+    # Force Jubilant's logger to emit at INFO (the level the doc claim concerns) so the
+    # assertion is deterministic regardless of how Jubilant configures its own logger.
+    jubilant_logger = logging.getLogger("jubilant")
+    jubilant_logger.setLevel(logging.INFO)
+    jubilant_logger.info("integration test info probe")
+    captured_info = [
+        record
+        for record in caplog.records
+        if (record.name == "jubilant" or record.name.startswith("jubilant."))
+        and record.levelno >= logging.INFO
+    ]
+    assert captured_info, "expected Jubilant INFO logs to be retained in caplog"
diff --git a/kosmos/.coverage b/kosmos/.coverage
new file mode 100644
index 0000000..72b63e9
Binary files /dev/null and b/kosmos/.coverage differ
diff --git a/kosmos/tests/integration/test_charm.py b/kosmos/tests/integration/test_charm.py
index f3852e5..5d815a7 100644
--- a/kosmos/tests/integration/test_charm.py
+++ b/kosmos/tests/integration/test_charm.py
@@ -39,3 +39,26 @@ def test_deploy(charm: pathlib.Path, juju: jubilant.Juju):
     }
     juju.deploy(charm, app=APP_NAME, resources=resources)
     juju.wait(jubilant.all_active)
+
+
+@pytest.mark.xfail(
+    strict=True,
+    reason="without log_level=INFO, Jubilant INFO logs are not captured",
+)
+def test_jubilant_info_logs_captured(
+    charm: pathlib.Path, juju: jubilant.Juju, caplog: pytest.LogCaptureFixture
+):
+    """Jubilant's INFO logs must be retained in pytest's captured-log section."""
+    juju.wait(jubilant.all_active)
+    # Force Jubilant's logger to emit at INFO (the level the doc claim concerns) so the
+    # assertion is deterministic regardless of how Jubilant configures its own logger.
+    jubilant_logger = logging.getLogger("jubilant")
+    jubilant_logger.setLevel(logging.INFO)
+    jubilant_logger.info("integration test info probe")
+    captured_info = [
+        record
+        for record in caplog.records
+        if (record.name == "jubilant" or record.name.startswith("jubilant."))
+        and record.levelno >= logging.INFO
+    ]
+    assert captured_info, "expected Jubilant INFO logs to be retained in caplog"