diff --git a/powersimdata/tests/test_mocks.py b/powersimdata/tests/test_mocks.py
new file mode 100644
index 000000000..eaa42730b
--- /dev/null
+++ b/powersimdata/tests/test_mocks.py
@@ -0,0 +1,100 @@
+import unittest
+
+import pandas as pd
+
+from powersimdata.tests.mock_scenario import MockScenario
+from powersimdata.tests.mock_grid import MockGrid
+
+
+# plant_id is the index
+mock_plant = {
+    'plant_id': [101, 102, 103, 104, 105, 106],
+    'bus_id': [1001, 1002, 1003, 1004, 1005, 1006],
+    'type': ['solar', 'wind', 'ng', 'coal', 'dfo', 'hydro'],
+    'zone_id': [1, 2, 3, 1, 3, 2],
+    'GenFuelCost': [0, 0, 3.3, 4.4, 5.5, 0],
+    'Pmin': [0, 0, 0, 0, 0, 0],
+    'Pmax': [40, 80, 50, 150, 80, 60],
+}
+
+
+class TestMocks(unittest.TestCase):
+
+    def setUp(self):
+        self.period_num = 4
+        self.mock_pg = pd.DataFrame({
+            plant_id: [(i+1)*p for p in range(self.period_num)]
+            for i, plant_id in enumerate(mock_plant['plant_id'])})
+        self.mock_pg.set_index(pd.date_range(
+            start='2016-01-01', periods=self.period_num, freq='H'),
+            inplace=True)
+        self.mock_pg.index.name = 'UTC'
+
+        solar_plant_id = [plant_id
+                          for i, plant_id in enumerate(mock_plant['plant_id'])
+                          if mock_plant['type'][i] == 'solar']
+        self.mock_solar = self.mock_pg[solar_plant_id] * 2
+
+        wind_plant_id = [plant_id
+                         for i, plant_id in enumerate(mock_plant['plant_id'])
+                         if mock_plant['type'][i] == 'wind']
+        self.mock_wind = self.mock_pg[wind_plant_id] * 4
+
+        hydro_plant_id = [plant_id
+                          for i, plant_id in enumerate(mock_plant['plant_id'])
+                          if mock_plant['type'][i] == 'hydro']
+        self.mock_hydro = self.mock_pg[hydro_plant_id] * 1.5
+    
+    # check that MockGrid is working correctly
+    def test_mock_grid_successes(self):
+        grid = MockGrid(grid_attrs={'plant': mock_plant})
+        self.assertTrue(isinstance(grid, object),
+                        'MockGrid should return an object')
+        self.assertTrue(hasattr(grid, 'plant'),
+                        'Plant property should be in the MockGrid')
+        self.assertEqual(len(grid.branch), 0, 
+                         'Branch dataframe should be empty in the MockGrid')
+    
+    def test_mock_grid_failures(self):
+        with self.assertRaises(TypeError):
+            MockGrid(grid_attrs='foo')
+        with self.assertRaises(TypeError):
+            MockGrid(grid_attrs={1: 'foo'})
+        with self.assertRaises(ValueError):
+            MockGrid(grid_attrs={'foo': 'bar'})
+
+    def test_mock_pg_stored_properly(self):
+        scenario = MockScenario(
+            grid_attrs={'plant': mock_plant},
+            pg=self.mock_pg)
+        pg = scenario.state.get_pg()
+        err_msg = 'pg should have dimension (periodNum * len(plant))'
+        self.assertEqual(pg.shape, self.mock_pg.shape, err_msg)
+
+    def test_mock_solar_stored_properly(self):
+        scenario = MockScenario(
+            grid_attrs={'plant': mock_plant},
+            solar=self.mock_solar)
+        solar = scenario.state.get_solar()
+        err_msg = 'solar should have dimension (periodNum * len(solar_plant))'
+        self.assertEqual(solar.shape, self.mock_solar.shape, err_msg)
+
+    def test_mock_wind_stored_properly(self):
+        scenario = MockScenario(
+            grid_attrs={'plant': mock_plant},
+            wind=self.mock_wind)
+        wind = scenario.state.get_wind()
+        err_msg = 'wind should have dimension (periodNum * len(wind_plant))'
+        self.assertEqual(wind.shape, self.mock_wind.shape, err_msg)
+
+    def test_mock_hydro_stored_properly(self):
+        scenario = MockScenario(
+            grid_attrs={'plant': mock_plant},
+            hydro=self.mock_hydro)
+        hydro = scenario.state.get_hydro()
+        err_msg = 'hydro should have dimension (periodNum * len(hydro_plant))'
+        self.assertEqual(hydro.shape, self.mock_hydro.shape, err_msg)
+
+
+if __name__ == '__main__':
+    unittest.main()