Import TLJH only when needed in conftest.py

integration-tests/conftest.py

@@ -4,12 +4,14 @@ import os
 
 from pytest import fixture
 
-from tljh.config import CONFIG_FILE, reload_component
 
 
 @fixture
 def preserve_config(request):
     """Fixture to save and restore config around tests"""
+    # Import TLJH only when needed. This lets us run tests in places
+    # where TLJH is not installed - particularly, the 'distro check' test.
+    from tljh.config import CONFIG_FILE, reload_component
     if os.path.exists(CONFIG_FILE):
         with open(CONFIG_FILE) as f:
             save_config = f.read()