diff --git a/pecos/__init__.py b/pecos/__init__.py
index 406b65e..e05b372 100644
--- a/pecos/__init__.py
+++ b/pecos/__init__.py
@@ -6,7 +6,7 @@
 from pecos import utils
 from pecos import pv
 
-__version__ = '0.3.0'
+__version__ = '0.3.1'
 
 __copyright__ = """Copyright 2016 National Technology & Engineering 
     Solutions of Sandia, LLC (NTESS). Under the terms of Contract 
diff --git a/pecos/tests/test_monitoring.py b/pecos/tests/test_monitoring.py
index 7ce0c92..47433ac 100644
--- a/pecos/tests/test_monitoring.py
+++ b/pecos/tests/test_monitoring.py
@@ -348,7 +348,7 @@ def test_check_exact_times_true(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=1, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
 
     def test_check_exact_times_false(self):
         self.pm.check_timestamp(3600, exact_times=False)
@@ -358,7 +358,7 @@ def test_check_exact_times_false(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=1, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
 
     def test_check_exact_times_true_with_start_time(self):
         self.pm.check_timestamp(3600, expected_start_time=pd.Timestamp('2016-10-17 01:00:00'), 
@@ -370,7 +370,7 @@ def test_check_exact_times_true_with_start_time(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=1, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
 
 
 class Test_check_delta(unittest.TestCase):
@@ -401,7 +401,7 @@ def test_deadsensor(self):
             index=pd.RangeIndex(start=0, stop=2, step=1)
             )
         #pecos.graphics.plot_test_results(self.pm.df, self.pm.test_results, filename_root='test_deadsensor')
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
         
     def test_increment_deadsensor(self):
         # As expected, check_increment does not produce the same results as check_delta
@@ -418,7 +418,7 @@ def test_abrupt_change(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=3, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
 
     def test_abrupt_positive_change(self):
         # abrupt positive change = > 7 in 3 hours
@@ -429,7 +429,7 @@ def test_abrupt_positive_change(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=2, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
         
     def test_abrupt_negative_change(self):
         # abrupt negative change = < 7 in 3 hours
@@ -439,7 +439,7 @@ def test_abrupt_negative_change(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=1, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
 
     def test_delta_scale(self, output=False):
         # The following function was used to test scalability of the delta test
@@ -545,7 +545,7 @@ def test_outlier(self):
             columns=['Variable Name', 'Start Time', 'End Time', 'Timesteps', 'Error Flag'],
             index=pd.RangeIndex(start=0, stop=2, step=1)
             )
-        assert_frame_equal(expected, self.pm.test_results)
+        assert_frame_equal(expected, self.pm.test_results, check_dtype=False)
         
         # Functional tests
         results = pecos.monitoring.check_outlier(self.pm.data, [None, 1.9], window=None, absolute_value=True )