diff --git a/tests/test_recall.py b/tests/test_recall.py
index 31b2514..8a0c4db 100644
--- a/tests/test_recall.py
+++ b/tests/test_recall.py
@@ -15,6 +15,28 @@ def test_recall_inherited_BaseTimeSeriesMetrics(self):
             isinstance(recall, BaseTimeSeriesMetrics)
         )
 
+    def test_RecallClass_init(self):
+        """ Test of init function.
+        """
+
+        test_case_1 = {'alpha': 0.0, 'cardinality': 'one', 'bias': 'flat'}
+        test_case_2 = {'alpha': 0.0, 'cardinality': 'one', 'bias': None}
+        test_case_3 = {'alpha': 10.0, 'cardinality': 'one', 'bias': 'flat'}
+
+        # test of the normal call
+        obj = TimeSeriesRecall(**test_case_1)
+        self.assertEqual(obj.alpha, test_case_1['alpha'])
+        self.assertEqual(obj.cardinality, test_case_1['cardinality'])
+        self.assertEqual(obj.bias, test_case_1['bias'])
+
+        # test of the invalid bias
+        with self.assertRaises(Exception):
+            obj = TimeSeriesRecall(**test_case_2)
+
+        # test of the invalid alpha
+        with self.assertRaises(Exception):
+            obj = TimeSeriesRecall(**test_case_3)
+
     def test_recall_function(self):
         """Teest of ts_recall function.
         """