conftest.py: Changed r2b6 test case into r2b4.

pyicon/tests/conftest.py

@@ -33,11 +33,11 @@ def examp_icon_dataset():
     #fpath_data = cur_dir / "test_data/icon_example_data_r2b6.nc"
     path_data = Path(pyic.params['path_example_data'])
     path_data.mkdir(parents=True, exist_ok=True)
-    fpath_data = path_data / "icon_example_data_r2b6.nc"
+    fpath_data = path_data / "icon_example_data_r2b4.nc"
 
     if not fpath_data.exists():
         import requests
-        download_link = "https://swift.dkrz.de/v1/dkrz_07387162e5cd4c81b1376bd7c648bb60/pyicon_example_data/icon_example_data_r2b6.nc"
+        download_link = "https://swift.dkrz.de/v1/dkrz_07387162e5cd4c81b1376bd7c648bb60/pyicon_example_data/icon_example_data_r2b4.nc"
         try:
             r = requests.get(download_link, allow_redirects=True)
             with open(fpath_data, "wb") as fobj: