diff --git a/solventmapcreator/test/iotest/polynomialdatareadertest.py b/solventmapcreator/test/iotest/polynomialdatareadertest.py
index 4867ed8954fddba04704b3ce5eb6f3974f77330c..bf2d0d20d3191a9f53af9e54069cefdaa30274d3 100644
--- a/solventmapcreator/test/iotest/polynomialdatareadertest.py
+++ b/solventmapcreator/test/iotest/polynomialdatareadertest.py
@@ -22,9 +22,10 @@ class PolynomialDataReaderTestCase(unittest.TestCase):
         """Set up for tests.
         """
         self.expected_list = [['Order','Fit Range', 'RMSE', 'Covariance', 'Coefficients'],
-                              ['1', 'All', '0.0154303', '0.0007143', '-0.0500000', '1.0714286']]
+                              ['1', 'All', '0.0154303350', '7.142857142857E-04',
+                               '-5.000000000000E-02', '1.071428571429E+00']]
         self.expected_data_by_solvent_id = {"expected,poly,fit":{1:{"coefficients":np.array([-0.05, 
-                                                                                             1.07142857]),
+                                                                                             1.071428571429]),
                                                                     "RMSE":0.015430334996209221,
                                                                     "order":1,
                                                                     "covar":0.0007143}}}
diff --git a/solventmapcreator/test/iotest/polynomialdatawritertest.py b/solventmapcreator/test/iotest/polynomialdatawritertest.py
index 17895114371e8f5069b1272ca07e7813561bc64f..50154421a3d20a84e7567ce06671e994a3306974 100644
--- a/solventmapcreator/test/iotest/polynomialdatawritertest.py
+++ b/solventmapcreator/test/iotest/polynomialdatawritertest.py
@@ -36,10 +36,10 @@ class PolynomialDataWriterTestCase(unittest.TestCase):
                                                       Value(0.5, 'Log(Sw)', Units.dimensionless), 'EXAMPLE3')])
         self.datapoints.createDataArrays()
         self.expected_polynomial_data = {1:{"coefficients":np.array([-0.05, 
-                                                                     1.07142857]),
+                                                                     1.071428571429]),
                                             "RMSE":0.015430334996209221,
                                             "order":1,
-                                            "covar":np.array([0.0007143])}}
+                                            "covar":np.array([0.0007142857142857])}}
         self.expected_file_name = "resources/expected_poly_fit.csv"
     def tearDown(self):
         """Tear down after tests
@@ -66,10 +66,10 @@ class PolynomialDataWriterTestCase(unittest.TestCase):
                                                                                       'EXAMPLE3'])
         self.assertEqual(0, poly_file_out)
         with open(expected_file_name, 'r') as exp_file:
-            exp_file_lines = exp_file.readlines()
+            exp_file_lines = exp_file.read()
             with open(actual_file_name, 'r') as act_file:
-                act_file_lines = act_file.readlines()
-                self.assertListEqual(act_file_lines, exp_file_lines)
+                act_file_lines = act_file.read()
+                self.assertMultiLineEqual(act_file_lines, exp_file_lines)
     def test_write_poly_data_to_file(self):
         """Test to see if expected file is produced.
         """
@@ -78,10 +78,10 @@ class PolynomialDataWriterTestCase(unittest.TestCase):
                                                                      [1], actual_file_name)
         self.assertEqual(0, poly_file_out)
         with open(self.expected_file_name, 'r') as exp_file:
-            exp_file_lines = exp_file.readlines()
+            exp_file_lines = exp_file.read()
             with open(actual_file_name, 'r') as act_file:
-                act_file_lines = act_file.readlines()
-                self.assertListEqual(act_file_lines, exp_file_lines)
+                act_file_lines = act_file.read()
+                self.assertMultiLineEqual(act_file_lines, exp_file_lines)
     def test_write_poly_fit_data_to_file(self):
         """Test to see if expected file is produced.
         """
@@ -90,10 +90,10 @@ class PolynomialDataWriterTestCase(unittest.TestCase):
                                                                          actual_file_name)
         self.assertEqual(0, poly_file_out)
         with open(self.expected_file_name, 'r') as exp_file:
-            exp_file_lines = exp_file.readlines()
+            exp_file_lines = exp_file.read()
             with open(actual_file_name, 'r') as act_file:
-                act_file_lines = act_file.readlines()
-                self.assertListEqual(act_file_lines, exp_file_lines)
+                act_file_lines = act_file.read()
+                self.assertMultiLineEqual(act_file_lines, exp_file_lines)
     def test_generate_poly_fit_data_order_list_split_fit(self):
         """Test to see if expected dictionary is returned.
         """
diff --git a/solventmapcreator/test/resources/expected_poly_fit.csv b/solventmapcreator/test/resources/expected_poly_fit.csv
index 7dade0215094f9d975604b171147262a1bc1c83f..29022a7d08e47d8cbb08492b0372c4096d7309c6 100644
--- a/solventmapcreator/test/resources/expected_poly_fit.csv
+++ b/solventmapcreator/test/resources/expected_poly_fit.csv
@@ -1,2 +1,2 @@
 Order	Fit Range	RMSE	Covariance	Coefficients
-1	All	0.0154303	0.0007143	-0.0500000	1.0714286
+1	All	0.0154303350	7.142857142857E-04	-5.000000000000E-02	1.071428571429E+00
diff --git a/solventmapcreator/test/resources/expected_poly_fit2.csv b/solventmapcreator/test/resources/expected_poly_fit2.csv
index bf4273c23e1cf499c8f34fa93f446849460878b6..088ca9956c79b8f37aad94e1189e3b30656b51f3 100644
--- a/solventmapcreator/test/resources/expected_poly_fit2.csv
+++ b/solventmapcreator/test/resources/expected_poly_fit2.csv
@@ -1,3 +1,3 @@
 Order	Fit Range	RMSE	Covariance	Coefficients
-1	positive	0.0154303	0.0007143	-0.0500000	1.0714286
-1	negative	0.0154303	0.0007143	-0.0500000	1.0714286
+1	positive	0.0154303350	7.142857142857E-04	-5.000000000000E-02	1.071428571429E+00
+1	negative	0.0154303350	7.142857142857E-04	-5.000000000000E-02	1.071428571429E+00
diff --git a/solventmapcreator/test/resources/water_poly_fit.csv b/solventmapcreator/test/resources/water_poly_fit.csv
index 828ee4dbfaab0ee3c122b80b24a71c225732a0fa..b44510e0e76360c9c7edd44e4b9754a54e738c7d 100644
--- a/solventmapcreator/test/resources/water_poly_fit.csv
+++ b/solventmapcreator/test/resources/water_poly_fit.csv
@@ -1,3 +1,3 @@
 Order	Fit Range	RMSE	Covariance	Coefficients
-2	All	4.0483148	180.2773802	-3.5005663	-0.7862852	-0.2194883
-4	All	0.3415296	1.2830673	0.5181064	0.2546154	-0.3766517	-0.0206377	-0.0003760
+2	All	4.0483148029	1.802773801770E+02	-3.500566341820E+00	-7.862851828746E-01	-2.194883219214E-01
+4	All	0.3415296254	1.283067334917E+00	5.181063564258E-01	2.546154441813E-01	-3.766516658949E-01	-2.063766915193E-02	-3.760100956862E-04
diff --git a/solventmapcreator/test/resources/water_poly_fit_split.csv b/solventmapcreator/test/resources/water_poly_fit_split.csv
index 39d3f9a05af6c14892d24bb6be23e2684a7431b1..6c10c3052864deb06bede93fca278e8dbb4840fb 100644
--- a/solventmapcreator/test/resources/water_poly_fit_split.csv
+++ b/solventmapcreator/test/resources/water_poly_fit_split.csv
@@ -1,5 +1,5 @@
 Order	Fit Range	RMSE	Covariance	Coefficients
-2	positive	0.0000000	1.2077460	-0.8992891	-0.3969325
-2	negative	0.0188857	0.0017833	6.3245323	2.8927088	-0.0017566
-4	positive	0.0000000	1.3515748	-1.3179762	-0.1267861	-0.0151557	-0.0020380
-4	negative	0.0000000	5.0388427	2.2906276	-0.0985583	-0.0064807	-0.0001546
+2	positive	0.0000000000	1.207745983893E+00	-8.992891495144E-01	-3.969324545381E-01
+2	negative	0.0188856511	1.783339090217E-03	6.324532283352E+00	2.892708835890E+00	-1.756642146001E-03
+4	positive	0.0000000000	1.351574765483E+00	-1.317976202630E+00	-1.267861157836E-01	-1.515573075910E-02	-2.037974009318E-03
+4	negative	0.0000000000	5.038842703124E+00	2.290627584013E+00	-9.855829501750E-02	-6.480660276549E-03	-1.545673352234E-04
diff --git a/solventmapcreator/test/resources/water_poly_fit_subset.csv b/solventmapcreator/test/resources/water_poly_fit_subset.csv
index e5b49042b960fbd86f2a1c12d498cf28bc9ed459..cfddb0e542fe82701204c89d46bf4540a246d107 100644
--- a/solventmapcreator/test/resources/water_poly_fit_subset.csv
+++ b/solventmapcreator/test/resources/water_poly_fit_subset.csv
@@ -1,3 +1,3 @@
 Order	Fit Range	RMSE	Covariance	Coefficients
-2	All	0.0188857	0.0017833	6.3245323	2.8927088	-0.0017566
-4	All	0.0000000	5.0388427	2.2906276	-0.0985583	-0.0064807	-0.0001546
+2	All	0.0188856511	1.783339090217E-03	6.324532283352E+00	2.892708835890E+00	-1.756642146001E-03
+4	All	0.0000000000	5.038842703124E+00	2.290627584013E+00	-9.855829501750E-02	-6.480660276549E-03	-1.545673352234E-04