diff --git a/src/openflexure_microscope_server/server/__init__.py b/src/openflexure_microscope_server/server/__init__.py
index 546f7118..afcf7e8b 100644
--- a/src/openflexure_microscope_server/server/__init__.py
+++ b/src/openflexure_microscope_server/server/__init__.py
@@ -93,8 +93,8 @@ def customise_server(
         lt.logs.configure_thing_logger(logging.DEBUG)
 
     # Add an endpoint to get the logs - (directly calling the FastAPI decorator)
-    server.app.get(str(server._api_prefix.rstrip("/")) + "/log/")(retrieve_log)
-    server.app.get(str(server._api_prefix.rstrip("/")) + "/logfile/")(
+    server.app.get(str(server.api_prefix.rstrip("/")) + "/log/")(retrieve_log)
+    server.app.get(str(server.api_prefix.rstrip("/")) + "/logfile/")(
         retrieve_log_from_file
     )
 
diff --git a/src/openflexure_microscope_server/server/serve_static_files.py b/src/openflexure_microscope_server/server/serve_static_files.py
index 0d360a73..f34bc93e 100644
--- a/src/openflexure_microscope_server/server/serve_static_files.py
+++ b/src/openflexure_microscope_server/server/serve_static_files.py
@@ -74,7 +74,7 @@ def add_static_files(server: lt.ThingServer, data_folder: str) -> None:
     if not os.path.isdir(data_folder):
         os.makedirs(data_folder)
     app.mount(
-        server._api_prefix.rstrip("/") + "/data/",
+        server.api_prefix.rstrip("/") + "/data/",
         StaticFiles(directory=data_folder),
         name="data",
     )
diff --git a/tests/unit_tests/test_serve_static_files.py b/tests/unit_tests/test_serve_static_files.py
index 62a741d0..c62331bf 100644
--- a/tests/unit_tests/test_serve_static_files.py
+++ b/tests/unit_tests/test_serve_static_files.py
@@ -126,7 +126,7 @@ def test_add_static_files(mock_static_dir, mocker):
     )
     mock_server = mocker.Mock()
     mock_server.app = mock_app
-    mock_server._api_prefix = "/api/v3"
+    mock_server.api_prefix = "/api/v3"
     # Get the wrapper function from the mocked decorator
     wrapper = mock_app.get.return_value
     with tempfile.TemporaryDirectory() as datadir:
diff --git a/tests/unit_tests/test_server_config.py b/tests/unit_tests/test_server_config.py
index 25dea30f..5ce1cac9 100644
--- a/tests/unit_tests/test_server_config.py
+++ b/tests/unit_tests/test_server_config.py
@@ -63,7 +63,7 @@ def test_customise_server(mocker):
     mocked_retrieve_log = mocker.patch.object(ofm_server, "retrieve_log")
     mocked_retrieve_log_file = mocker.patch.object(ofm_server, "retrieve_log_from_file")
 
-    mock_server._api_prefix = "/api/v3/"
+    mock_server.api_prefix = "/api/v3/"
     mock_app = mock_server.app
     # The wrapper returned for app.get so we can see what functions are decorated.
     wrapper = mock_app.get.return_value