diff --git a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/Path.test.tsx b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/Path.test.tsx
new file mode 100644
index 00000000000..96f7ca4e760
--- /dev/null
+++ b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/Path.test.tsx
@@ -0,0 +1,120 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+// eslint-disable-next-line import/no-extraneous-dependencies
+import '@testing-library/jest-dom';
+
+jest.mock('../../DeckGLContainer', () => ({
+  DeckGLContainerStyledWrapper: ({ children }: any) => (
+    <div data-testid="deckgl-container">{children}</div>
+  ),
+}));
+
+jest.mock('../../factory', () => ({
+  createDeckGLComponent: jest.fn(() => () => null),
+  GetLayerType: {},
+}));
+
+import { getLayer, getPoints, getHighlightLayer } from './Path';
+
+const mockFormData = {
+  datasource: 'test_datasource',
+  viz_type: 'deck_path',
+  color_picker: { r: 0, g: 122, b: 135, a: 1 },
+  line_width: 150,
+  line_width_unit: 'meters',
+  slice_id: 1,
+};
+
+const mockPayload = {
+  data: {
+    features: [
+      {
+        path: [
+          [-122.4, 37.8],
+          [-122.5, 37.9],
+        ],
+      },
+    ],
+  },
+};
+
+test('getLayer uses line_width_unit from formData', () => {
+  const layer = getLayer({
+    formData: mockFormData,
+    payload: mockPayload,
+    onContextMenu: jest.fn(),
+    filterState: undefined,
+    setDataMask: jest.fn(),
+    setTooltip: jest.fn(),
+    emitCrossFilters: false,
+  });
+
+  expect(layer.props.widthUnits).toBe('meters');
+});
+
+test('getLayer uses pixels when line_width_unit is pixels', () => {
+  const layer = getLayer({
+    formData: { ...mockFormData, line_width_unit: 'pixels' },
+    payload: mockPayload,
+    onContextMenu: jest.fn(),
+    filterState: undefined,
+    setDataMask: jest.fn(),
+    setTooltip: jest.fn(),
+    emitCrossFilters: false,
+  });
+
+  expect(layer.props.widthUnits).toBe('pixels');
+});
+
+test('getHighlightLayer uses line_width_unit from formData', () => {
+  const layer = getHighlightLayer({
+    formData: mockFormData,
+    payload: mockPayload,
+    filterState: { value: [] },
+    onContextMenu: jest.fn(),
+    setDataMask: jest.fn(),
+    setTooltip: jest.fn(),
+    emitCrossFilters: false,
+  });
+
+  expect(layer.props.widthUnits).toBe('meters');
+});
+
+test('getPoints extracts points from path data', () => {
+  const data = [
+    {
+      path: [
+        [0, 0],
+        [1, 1],
+      ],
+    },
+    {
+      path: [
+        [2, 2],
+        [3, 3],
+      ],
+    },
+  ];
+
+  const points = getPoints(data);
+
+  expect(points).toHaveLength(4);
+  expect(points[0]).toEqual([0, 0]);
+  expect(points[2]).toEqual([2, 2]);
+});
diff --git a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/controlPanel.ts b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/controlPanel.ts
index 916ad8d7daa..194b9d92802 100644
--- a/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/controlPanel.ts
+++ b/superset-frontend/plugins/legacy-preset-chart-deckgl/src/layers/Path/controlPanel.ts
@@ -75,7 +75,7 @@ const config: ControlPanelConfig = {
             config: {
               type: 'SelectControl',
               label: t('Line width unit'),
-              default: 'pixels',
+              default: 'meters',
               choices: [
                 ['meters', t('meters')],
                 ['pixels', t('pixels')],
diff --git a/superset/examples/deckgl_demo/charts/Deck.gl_Path.yaml b/superset/examples/deckgl_demo/charts/Deck.gl_Path.yaml
index 993eb802ef5..c8292bf6e4d 100644
--- a/superset/examples/deckgl_demo/charts/Deck.gl_Path.yaml
+++ b/superset/examples/deckgl_demo/charts/Deck.gl_Path.yaml
@@ -35,6 +35,7 @@ params:
   line_column: path_json
   line_type: json
   line_width: 150
+  line_width_unit: meters
   mapbox_style: https://tile.openstreetmap.org/{z}/{x}/{y}.png
   reverse_long_lat: false
   row_limit: 5000