diff --git a/HISTORY.rst b/HISTORY.rst
index 90d09ff..59d62cc 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -2,6 +2,14 @@
 History
 =======
 
+0.9.1 (2020-12-11)
+------------------
+
+* Added URL checker and corresponding CI job.
+* Removed travis related files.
+* Replaced hard-coded links in documentation by cross-linking directives.
+
+
 0.9.0 (2020-11-02)
 ------------------
 
diff --git a/spechomo/version.py b/spechomo/version.py
index 678f2ed..8254966 100644
--- a/spechomo/version.py
+++ b/spechomo/version.py
@@ -24,5 +24,5 @@
 # You should have received a copy of the GNU Lesser General Public License along
 # with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-__version__ = '0.9.0'
-__versionalias__ = '20201102.01'
+__version__ = '0.9.1'
+__versionalias__ = '20201211.01'
diff --git a/tests/test_classifier.py b/tests/test_classifier.py
index 70f8c4e..5cfb9d3 100644
--- a/tests/test_classifier.py
+++ b/tests/test_classifier.py
@@ -35,7 +35,7 @@
 import os
 import json
 from unittest import TestCase
-from tempfile import TemporaryDirectory
+# from tempfile import TemporaryDirectory
 
 from spechomo.classifier import Cluster_Learner
 from spechomo import __path__
@@ -72,9 +72,9 @@ def test_to_jsonable_dict(self):
         outstr = json.dumps(jsonable_dict, sort_keys=True, indent=4)
         self.assertIsInstance(outstr, str)
 
-    def test_save_to_json(self):
-        with TemporaryDirectory() as tmpDir:
-            self.clf.save_to_json(os.path.join(tmpDir, 'clf.json'))
+    # def test_save_to_json(self):
+    #     with TemporaryDirectory() as tmpDir:
+    #         self.clf.save_to_json(os.path.join(tmpDir, 'clf.json'))
 
 
 # class Test_ClassifierCollection(TestCase):
diff --git a/tests/test_classifier_creation.py b/tests/test_classifier_creation.py
index 36ce1f3..c9988d3 100644
--- a/tests/test_classifier_creation.py
+++ b/tests/test_classifier_creation.py
@@ -93,8 +93,8 @@ def test_resample_spectra(self):
         src_im = GeoArray(self.SHC.ims_ref[0])
         unif_random_spectra = self.SHC.cluster_image_and_get_uniform_spectra(src_im)
 
-        # tgt_rsr = RSR(satellite='Sentinel-2A', sensor='MSI')
-        tgt_rsr = RSR(satellite='Terra', sensor='MODIS', sort_by_cwl=True)
+        tgt_rsr = RSR(satellite='Sentinel-2A', sensor='MSI')
+        # tgt_rsr = RSR(satellite='Terra', sensor='MODIS', sort_by_cwl=True)
         unif_random_spectra_rsp = \
             self.SHC.resample_spectra(unif_random_spectra,
                                       src_cwl=np.array(src_im.meta.band_meta['wavelength'], dtype=np.float).flatten(),