diff --git a/tests/test_costs.py b/tests/test_costs.py
deleted file mode 100644
index 535f168..0000000
--- a/tests/test_costs.py
+++ /dev/null
@@ -1,9 +0,0 @@
-import unittest
-from costs.cost import Cost
-
-
-class TestCosts(unittest.TestCase):
-  def test_costs(self):
-    cost = Cost()
-    self.assertEqual(True, False)  # add assertion here
-
diff --git a/tests/unit_tests.py b/tests/unit_tests.py
index 5c4bbdc..22a8c06 100644
--- a/tests/unit_tests.py
+++ b/tests/unit_tests.py
@@ -49,7 +49,7 @@ class UnitTests(unittest.TestCase):
     for building in self._city.buildings:
       result = Cost(building).life_cycle
       self.assertIsNotNone(result)
-      self.assertEqual(0, result.values[0])
+      self.assertEqual(1, result.values[0])
 
   def test_scenario_1(self):
     for building in self._city.buildings: