diff --git a/tests/e2e/test_client.py b/tests/e2e/test_client.py
index e4e7b6b..4733a8a 100644
--- a/tests/e2e/test_client.py
+++ b/tests/e2e/test_client.py
@@ -35,6 +35,18 @@ def setUp(self) -> None:
         )
         self.valid_api_key = os.environ["DUNE_API_KEY"]
 
+    def copy_query_and_change_parameters(self) -> QueryBase:
+        new_query = copy.copy(self.query)
+        new_query.params = [
+            # Using all different values for parameters.
+            QueryParameter.text_type(name="TextField", value="different word"),
+            QueryParameter.number_type(name="NumberField", value=22),
+            QueryParameter.date_type(name="DateField", value="1991-01-01 00:00:00"),
+            QueryParameter.enum_type(name="ListField", value="Option 2"),
+        ]
+        self.assertNotEqual(self.query.parameters(), new_query.parameters())
+        return new_query
+
     def test_from_env_constructor(self):
         try:
             DuneClient.from_env()
@@ -66,19 +78,9 @@ def test_run_query_dataframe(self):
         self.assertGreater(len(pd), 0)
 
     def test_parameters_recognized(self):
-        query = copy.copy(self.query)
-        new_params = [
-            # Using all different values for parameters.
-            QueryParameter.text_type(name="TextField", value="different word"),
-            QueryParameter.number_type(name="NumberField", value=22),
-            QueryParameter.date_type(name="DateField", value="1991-01-01 00:00:00"),
-            QueryParameter.enum_type(name="ListField", value="Option 2"),
-        ]
-        query.params = new_params
-        self.assertEqual(query.parameters(), new_params)
-
+        new_query = self.copy_query_and_change_parameters()
         dune = DuneClient(self.valid_api_key)
-        results = dune.run_query(query)
+        results = dune.run_query(new_query)
         self.assertEqual(
             results.get_rows(),
             [
@@ -197,16 +199,30 @@ def test_upload_csv_success(self):
 
     def test_download_csv_success_by_id(self):
         client = DuneClient(self.valid_api_key)
+        new_query = self.copy_query_and_change_parameters()
+        # Run query with new parameters
+        client.run_query(new_query)
+        # Download CSV by query_id
         result_csv = client.download_csv(self.query.query_id)
+        # Expect that the csv returns the latest execution results (i.e. those that were just run)
         self.assertEqual(
             pandas.read_csv(result_csv.data).to_csv(index=False),
             "text_field,number_field,date_field,list_field\n"
-            "Word,3.1415926535,2022-05-04 00:00:00.000,Option 1\n",
+            "different word,22,1991-01-01 00:00:00.000,Option 2\n",
         )
 
     def test_download_csv_success_with_params(self):
         client = DuneClient(self.valid_api_key)
+        # Download CSV with query and given parameters.
         result_csv = client.download_csv(self.query)
+        # Expect the result to be relative to values of given parameters.
+        #################################################################
+        # Note that we could compare results with
+        #    ",".join([p.value for p in self.query.parameters()]) + "\n"
+        # but there seems to be a discrepancy with the date string values.
+        # Specifically 1991-01-01 00:00:00.000
+        #           vs 1991-01-01 00:00:00
+        #################################################################
         self.assertEqual(
             pandas.read_csv(result_csv.data).to_csv(index=False),
             "text_field,number_field,date_field,list_field\n"