diff --git a/my/core/common.py b/my/core/common.py
index fcbeabb..985ca67 100644
--- a/my/core/common.py
+++ b/my/core/common.py
@@ -246,3 +246,10 @@ def isoparse(s: str) -> tzdatetime:
     assert s.endswith('Z'), s
     s = s[:-1] + '+00:00'
     return fromisoformat(s)
+
+
+import re
+# https://stackoverflow.com/a/295466/706389
+def get_valid_filename(s: str) -> str:
+    s = str(s).strip().replace(' ', '_')
+    return re.sub(r'(?u)[^-\w.]', '', s)
diff --git a/tests/extra/polar.py b/tests/extra/polar.py
index 3ed0342..1656132 100644
--- a/tests/extra/polar.py
+++ b/tests/extra/polar.py
@@ -1,19 +1,49 @@
 from pathlib import Path
+import sys
+from importlib import reload
+from my.core.common import get_valid_filename
 
 ROOT = Path(__file__).parent.absolute()
+OUTPUTS = ROOT / 'outputs'
 
 
 import pytest # type: ignore
 
-# todo maybe search fot info.json recursively?
-@pytest.mark.parametrize('dotpolar', [
+
+def test_hpi(prepare: str) -> None:
+    import my.reading.polar as polar
+    reload(polar)
+    from my.reading.polar import get_entries
+    assert len(list(get_entries())) > 1
+
+
+def test_orger(prepare: str, tmp_path: Path) -> None:
+    import my.reading.polar as polar
+    reload(polar)
+    # TODO hmm... ok, need to document reload()
+
+    from my.core.common import import_from, import_file
+    om = import_file(ROOT / 'orger/modules/polar.py')
+    # reload(om)
+
+    pv = om.PolarView() # type: ignore
+    # TODO hmm. worth making public?
+    OUTPUTS.mkdir(exist_ok=True)
+    out = OUTPUTS / (get_valid_filename(prepare) + '.org')
+    pv._run(to=out)
+
+
+PARAMS = [
     '',
     'data/polar/BojanKV_polar/.polar',
     'data/polar/TheCedarPrince_KnowledgeRepository',
     'data/polar/coelias_polardocs',
     'data/polar/warkdarrior_polar-document-repository'
-])
-def test_hpi(dotpolar: str):
+]
+
+@pytest.fixture(params=PARAMS)
+def prepare(request):
+    dotpolar = request.param
     if dotpolar != '':
         pdir = Path(ROOT / dotpolar)
         class user_config:
@@ -22,12 +52,4 @@ def test_hpi(dotpolar: str):
         import my.config
         setattr(my.config, 'polar', user_config)
 
-    import sys
-    M = 'my.reading.polar'
-    if M in sys.modules:
-        del sys.modules[M]
-    # TODO maybe set config directly against polar module?
-
-    import my.reading.polar as polar
-    from my.reading.polar import get_entries
-    assert len(list(get_entries())) > 1
+    yield dotpolar