diff --git a/airflow/providers/papermill/operators/papermill.py b/airflow/providers/papermill/operators/papermill.py
index 3326b2e3c93a8..b89266d130889 100644
--- a/airflow/providers/papermill/operators/papermill.py
+++ b/airflow/providers/papermill/operators/papermill.py
@@ -81,26 +81,23 @@ def __init__(
 
         if not input_nb:
             raise ValueError("Input notebook is not specified")
-        elif not isinstance(input_nb, NoteBook):
-            self.input_nb = NoteBook(url=input_nb, parameters=self.parameters)
-        else:
-            self.input_nb = input_nb
+        self.input_nb = input_nb
 
         if not output_nb:
             raise ValueError("Output notebook is not specified")
-        elif not isinstance(output_nb, NoteBook):
-            self.output_nb = NoteBook(url=output_nb)
-        else:
-            self.output_nb = output_nb
+        self.output_nb = output_nb
 
         self.kernel_name = kernel_name
         self.language_name = language_name
         self.kernel_conn_id = kernel_conn_id
 
+    def execute(self, context: Context):
+        if not isinstance(self.input_nb, NoteBook):
+            self.input_nb = NoteBook(url=self.input_nb, parameters=self.parameters)
+        if not isinstance(self.output_nb, NoteBook):
+            self.output_nb = NoteBook(url=self.output_nb)
         self.inlets.append(self.input_nb)
         self.outlets.append(self.output_nb)
-
-    def execute(self, context: Context):
         remote_kernel_kwargs = {}
         kernel_hook = self.hook
         if kernel_hook:
diff --git a/tests/providers/papermill/operators/test_papermill.py b/tests/providers/papermill/operators/test_papermill.py
index 03fd0dc74e17b..e734bb8ed61a4 100644
--- a/tests/providers/papermill/operators/test_papermill.py
+++ b/tests/providers/papermill/operators/test_papermill.py
@@ -69,12 +69,21 @@ def test_mandatory_attributes(self):
             pytest.param(NoteBook(TEST_INPUT_URL), id="input-as-notebook-object"),
         ],
     )
-    def test_notebooks_objects(self, input_nb, output_nb):
+    @patch("airflow.providers.papermill.operators.papermill.pm")
+    @patch("airflow.providers.papermill.operators.papermill.PapermillOperator.hook")
+    def test_notebooks_objects(self, mock_papermill, mock_hook, input_nb, output_nb):
         """Test different type of Input/Output notebooks arguments."""
         op = PapermillOperator(task_id="test_notebooks_objects", input_nb=input_nb, output_nb=output_nb)
+
+        op.execute(None)
+
         assert op.input_nb.url == TEST_INPUT_URL
         assert op.output_nb.url == TEST_OUTPUT_URL
 
+        # Test render Lineage inlets/outlets
+        assert op.inlets[0] == op.input_nb
+        assert op.outlets[0] == op.output_nb
+
     @patch("airflow.providers.papermill.operators.papermill.pm")
     def test_execute(self, mock_papermill):
         in_nb = "/tmp/does_not_exist"
@@ -173,19 +182,9 @@ def test_render_template(self, create_task_instance_of_operator):
         task = ti.render_templates()
 
         # Test render Input/Output notebook attributes
-        assert task.input_nb.url == "/tmp/test_render_template.ipynb"
-        assert task.input_nb.parameters == {
-            "msgs": "dag id is test_render_template!",
-            "test_dt": DEFAULT_DATE.date().isoformat(),
-        }
-        assert task.output_nb.url == "/tmp/out-test_render_template.ipynb"
-        assert task.output_nb.parameters == {}
+        assert task.input_nb == "/tmp/test_render_template.ipynb"
+        assert task.output_nb == "/tmp/out-test_render_template.ipynb"
 
         # Test render other templated attributes
-        assert task.parameters == task.input_nb.parameters
         assert "python3" == task.kernel_name
         assert "python" == task.language_name
-
-        # Test render Lineage inlets/outlets
-        assert task.inlets[0] == task.input_nb
-        assert task.outlets[0] == task.output_nb