diff --git a/Makefile b/Makefile
index 9a148de..12a9397 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@ unit_tests:
 	${PYTHON} testsuite/read-write-df_test.py
 	${PYTHON} testsuite/parameter_test.py
 	${PYTHON} testsuite/henderson_hasselbalch_tests.py
+	${PYTHON} testsuite/analysis_tests.py
 
 functional_tests:
 	${PYTHON} testsuite/cph_ideal_tests.py
diff --git a/testsuite/analysis_tests.py b/testsuite/analysis_tests.py
new file mode 100644
index 0000000..f8c7fdf
--- /dev/null
+++ b/testsuite/analysis_tests.py
@@ -0,0 +1,19 @@
+import io
+import json
+import contextlib
+import unittest as ut
+import numpy as np
+import pandas as pd
+import pyMBE
+import lib.analysis as ana
+
+
+class Serialization(ut.TestCase):
+
+    def test_get_dt(self):
+        data = pd.DataFrame.from_dict( {'time': [0, 1, 2,], 'obs': ['1.0', '2.0', '4.0']} )
+        dt = ana.get_dt(data)
+        self.assertAlmostEqual(dt, 1.0, delta = 1e-7)
+
+if __name__ == "__main__":
+    ut.main()