diff --git a/scopesim/__init__.py b/scopesim/__init__.py
index 2a7b71df..97946132 100644
--- a/scopesim/__init__.py
+++ b/scopesim/__init__.py
@@ -34,6 +34,7 @@
 top_logger.setLevel(logging.WARNING)
 sim_logger = top_logger.getChild(__package__)
 sim_logger.setLevel(logging.DEBUG)
+top_logger.propagate = False
 formatter = logging.Formatter("%(name)s - %(levelname)s: %(message)s")
 
 log_dict = rc.__config__["!SIM.logging"]
diff --git a/scopesim/tests/conftest.py b/scopesim/tests/conftest.py
index 52469428..fab44def 100644
--- a/scopesim/tests/conftest.py
+++ b/scopesim/tests/conftest.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 """Global fixtures for pytest."""
 
+import logging
 from pathlib import Path
 
 import pytest
@@ -15,6 +16,20 @@
 sim.rc.__currsys__["!SIM.file.error_on_missing_file"] = True
 
 
+@pytest.fixture(scope="package", autouse=True)
+def configure_logging():
+    top_logger = logging.getLogger("astar")
+    handlers = top_logger.handlers
+    # Disable handlers
+    top_logger.handlers = []
+    # Make sure logging can reach pytest's caplog
+    top_logger.propagate = True
+    yield
+    # Restore
+    top_logger.handlers = handlers
+    top_logger.propagate = False
+
+
 @pytest.fixture(scope="package")
 def mock_dir():
     """Path to mock directory."""