diff --git a/oggm/shop/rgitopo.py b/oggm/shop/rgitopo.py
index 300fc2655..42561b8ce 100644
--- a/oggm/shop/rgitopo.py
+++ b/oggm/shop/rgitopo.py
@@ -23,6 +23,7 @@
 DEMS_URL = 'https://cluster.klima.uni-bremen.de/data/gdirs/dems_v2/default'
 DEMS_HR_URL = 'https://cluster.klima.uni-bremen.de/data/gdirs/dems_v1/highres/'
 
+
 def init_glacier_directories_from_rgitopo(rgidf=None, dem_source=None,
                                           resolution='default',
                                           keep_dem_folders=False,
diff --git a/oggm/tests/test_utils.py b/oggm/tests/test_utils.py
index 62b6b9496..81add04c1 100644
--- a/oggm/tests/test_utils.py
+++ b/oggm/tests/test_utils.py
@@ -2509,6 +2509,8 @@ def test_find_dem_zone(self):
         assert utils.default_dem_source('RGI60-11.00897') == 'NASADEM'
         assert utils.default_dem_source('RGI60-11.00897_merged') == 'NASADEM'
         assert utils.default_dem_source('RGI60-19.01251') == 'COPDEM90'
+        assert utils.default_dem_source('RGI60-06.00483') == 'COPDEM90'
+        assert utils.default_dem_source('RGI60-19.01405') == 'COPDEM90'
         assert utils.default_dem_source('RGI60-19.00970') == 'REMA'
         assert utils.default_dem_source('RGI60-05.10315') == 'GIMP'
         assert utils.default_dem_source('RGI60-19.01820') == 'MAPZEN'
diff --git a/oggm/tests/test_workflow.py b/oggm/tests/test_workflow.py
index 9a51d542d..6d69271a0 100644
--- a/oggm/tests/test_workflow.py
+++ b/oggm/tests/test_workflow.py
@@ -52,10 +52,10 @@ def up_to_climate(reset=False, use_mp=None):
     cfg.initialize()
 
     # Use multiprocessing
-    # if use_mp is None:
-    #     cfg.PARAMS['use_multiprocessing'] = use_multiprocessing()
-    # else:
-    #     cfg.PARAMS['use_multiprocessing'] = use_mp
+    if use_mp is None:
+        cfg.PARAMS['use_multiprocessing'] = use_multiprocessing()
+    else:
+        cfg.PARAMS['use_multiprocessing'] = use_mp
 
     # Working dir
     cfg.PATHS['working_dir'] = _TEST_DIR
diff --git a/oggm/utils/_downloads.py b/oggm/utils/_downloads.py
index deb57d67f..2968dd712 100644
--- a/oggm/utils/_downloads.py
+++ b/oggm/utils/_downloads.py
@@ -69,7 +69,7 @@
 # The given commit will be downloaded from github and used as source for
 # all sample data
 SAMPLE_DATA_GH_REPO = 'OGGM/oggm-sample-data'
-SAMPLE_DATA_COMMIT = 'f94ba47fc7c3d0355b806e622e330106e08cc16f'
+SAMPLE_DATA_COMMIT = '8a3c41a36d190c6c78029b5032648ce94ee2026c'
 
 GDIR_L1L2_URL = ('https://cluster.klima.uni-bremen.de/~oggm/gdirs/oggm_v1.4/'
                  'L1-L2_files/centerlines/')
@@ -2206,17 +2206,15 @@ def default_dem_source(rgi_id):
     rgi_id = rgi_id[:14]
     if cfg.DEM_SOURCE_TABLE.get(rgi_reg) is None:
         fp = get_demo_file('rgi62_dem_frac.h5')
-        cfg.DEM_SOURCE_TABLE[rgi_reg] = pd.read_hdf(fp, key=rgi_reg)
+        cfg.DEM_SOURCE_TABLE[rgi_reg] = pd.read_hdf(fp)
 
     sel = cfg.DEM_SOURCE_TABLE[rgi_reg].loc[rgi_id]
-    for s in ['NASADEM', 'COPDEM', 'GIMP', 'REMA', 'TANDEM', 'MAPZEN']:
+    for s in ['NASADEM', 'COPDEM90', 'COPDEM30', 'GIMP', 'REMA',
+              'RAMP', 'TANDEM', 'MAPZEN']:
         if sel.loc[s] > 0.75:
-            # this can go as soon as 'rgi62_dem_frac.h5' is updated:
-            if s == 'COPDEM':
-                s = 'COPDEM90'
             return s
-
-    return None
+    # If nothing works, try COPDEM again
+    return 'COPDEM90'
 
 
 def get_topo_file(lon_ex=None, lat_ex=None, rgi_id=None, *,