diff --git a/python/tests/tsdf_tests.py b/python/tests/tsdf_tests.py
index 00567bf4..1f0a5756 100644
--- a/python/tests/tsdf_tests.py
+++ b/python/tests/tsdf_tests.py
@@ -869,7 +869,14 @@ def test_withPartitionCols(self):
         self.assertEqual(init_tsdf.partitionCols, [])
         self.assertEqual(actual_tsdf.partitionCols, ["symbol"])
 
-    def test_tsdf_interpolate(self): ...
+    # def test_tsdf_interpolate(self):
+    #     # TODO: wicked slow
+    #     init_tsdf = self.get_test_df_builder("init").as_tsdf()
+    #     expected_tsdf = self.get_test_df_builder("expected").as_tsdf()
+    #
+    #     actual_tsdf = init_tsdf.interpolate("zero", "minute", "floor")
+    #
+    #     self.assertDataFrameEquality(actual_tsdf, expected_tsdf)
 
 
 class FourierTransformTest(SparkTest):
diff --git a/python/tests/unit_test_data/tsdf_tests.json b/python/tests/unit_test_data/tsdf_tests.json
index 6d352fd8..0c4b7a28 100644
--- a/python/tests/unit_test_data/tsdf_tests.json
+++ b/python/tests/unit_test_data/tsdf_tests.json
@@ -1057,6 +1057,41 @@
           }
         }
       }
+    },
+    "test_tsdf_interpolate": {
+      "init": {
+        "tsdf": {
+          "ts_col": "event_ts"
+        },
+        "df": {
+          "schema": "symbol string, event_ts string, trade_pr float",
+          "ts_convert": [
+            "event_ts"
+          ],
+          "data": {
+            "$ref": "#/__SharedData/temp_slice_init_data/df/data"
+          }
+        }
+      },
+      "expected": {
+        "tsdf": {
+          "ts_col": "event_ts"
+        },
+        "df": {
+          "schema": "event_ts string, trade_pr float",
+          "ts_convert": [
+            "event_ts"
+          ],
+          "data": [
+            ["2020-09-01 00:20:38", 0.0],
+            ["2020-09-01 00:20:39", 0.0],
+            ["2020-09-01 00:20:40", 0.0],
+            ["2020-09-01 00:20:41", 0.0],
+            ["2020-09-01 00:20:42", 762.33]
+          ]
+        }
+
+      }
     }
   },
   "FourierTransformTest": {