diff --git a/requirements.txt b/requirements.txt
index bba9eeb..ad82f14 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ numpy>=1.9
 rasterio>=0.27
 cligj>=0.4
 fiona
+simplejson
diff --git a/src/rasterstats/cli.py b/src/rasterstats/cli.py
index cd85e68..d365439 100644
--- a/src/rasterstats/cli.py
+++ b/src/rasterstats/cli.py
@@ -3,13 +3,9 @@
 from __future__ import division
 import logging
 
-try:
-    import simplejson as json
-except:
-    import json
-
 import click
 import cligj
+import simplejson as json
 
 from rasterstats import gen_zonal_stats, gen_point_query
 from rasterstats._version import __version__ as version
diff --git a/src/rasterstats/io.py b/src/rasterstats/io.py
index e1529ea..8138655 100644
--- a/src/rasterstats/io.py
+++ b/src/rasterstats/io.py
@@ -20,9 +20,9 @@
 
 PY3 = sys.version_info[0] >= 3
 if PY3:
-    string_types = str,
+    string_types = str,  # pragma: no cover
 else:
-    string_types = basestring,
+    string_types = basestring,  # pragma: no cover
 
 def wrap_geom(geom):
     """ Wraps a geometry dict in an GeoJSON Feature
diff --git a/src/rasterstats/main.py b/src/rasterstats/main.py
index 96b6700..247f63f 100644
--- a/src/rasterstats/main.py
+++ b/src/rasterstats/main.py
@@ -125,12 +125,6 @@ def gen_zonal_stats(
         if not affine:
             affine = Affine.from_gdal(*transform)
 
-    ndv = kwargs.get('nodata_value')
-    if ndv:
-        warnings.warn("Use `nodata` instead of `nodata_value`", DeprecationWarning)
-        if not nodata:
-            nodata = ndv
-
     cp = kwargs.get('copy_properties')
     if cp:
         warnings.warn("Use `geojson_out` to preserve feature properties",
diff --git a/src/rasterstats/utils.py b/src/rasterstats/utils.py
index d5d529e..9987789 100644
--- a/src/rasterstats/utils.py
+++ b/src/rasterstats/utils.py
@@ -12,6 +12,7 @@
     ['sum', 'std', 'median', 'majority', 'minority', 'unique', 'range', 'nodata']
 #  also percentile_{q} but that is handled as special case
 
+
 def get_percentile(stat):
     if not stat.startswith('percentile_'):
         raise ValueError("must start with 'percentile_'")
@@ -50,9 +51,10 @@ def rasterize_geom(geom, like, all_touched=False):
 
 def stats_to_csv(stats):
     if sys.version_info[0] >= 3:
-        from io import StringIO as IO
+        from io import StringIO as IO  # pragma: no cover
     else:
-        from cStringIO import StringIO as IO
+        from cStringIO import StringIO as IO  # pragma: no cover
+
     import csv
 
     csv_fh = IO()
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 5431b15..a6edc06 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,7 +1,9 @@
 import sys
 import os
 import pytest
-from rasterstats.utils import stats_to_csv, get_percentile, remap_categories
+from shapely.geometry import LineString
+from rasterstats.utils import \
+    stats_to_csv, get_percentile, remap_categories, boxify_points
 from rasterstats import zonal_stats
 from rasterstats.utils import VALID_STATS
 
@@ -31,6 +33,13 @@ def test_get_percentile():
     assert get_percentile('percentile_100') == 100.0
     assert get_percentile('percentile_13.2') == 13.2
 
+def test_get_bad_percentile():
+    with pytest.raises(ValueError):
+        get_percentile('foo')
+
+    with pytest.raises(ValueError):
+        get_percentile('percentile_101')
+
     with pytest.raises(ValueError):
         get_percentile('percentile_101')
 
@@ -48,3 +57,9 @@ def test_remap_categories():
     assert 1 not in new_stats.keys()
     assert 'grassland' in new_stats.keys()
     assert 3 in new_stats.keys()
+
+
+def test_boxify_non_point():
+    line = LineString([(0, 0), (1, 1)])
+    with pytest.raises(ValueError):
+        boxify_points(line, None)