diff --git a/addons/web/static/src/views/graph/graph_arch_parser.js b/addons/web/static/src/views/graph/graph_arch_parser.js
index d951bcea0b7..caa1e021090 100644
--- a/addons/web/static/src/views/graph/graph_arch_parser.js
+++ b/addons/web/static/src/views/graph/graph_arch_parser.js
@@ -37,7 +37,7 @@ export class GraphArchParser extends XMLParser {
                     break;
                 }
                 case "field": {
-                    let fieldName = node.getAttribute("name"); // exists (rng validation)
+                    const fieldName = node.getAttribute("name"); // exists (rng validation)
                     if (fieldName === "id") {
                         break;
                     }
diff --git a/addons/web/static/tests/views/graph_view_tests.js b/addons/web/static/tests/views/graph_view_tests.js
index add22121e76..a97c4cca226 100644
--- a/addons/web/static/tests/views/graph_view_tests.js
+++ b/addons/web/static/tests/views/graph_view_tests.js
@@ -2101,7 +2101,7 @@ QUnit.module("Views", (hooks) => {
             mode: "line",
             order: "ASC",
         });
-        let arch2 = `<graph disable_linking="0" string="Title" stacked="False"/>`;
+        const arch2 = `<graph disable_linking="0" string="Title" stacked="False"/>`;
         propsFromArch = new GraphArchParser().parse(arch2, fields);
 
         assert.deepEqual(propsFromArch, {
@@ -2118,7 +2118,7 @@ QUnit.module("Views", (hooks) => {
         assert.expect(1);
         const fields = serverData.models.foo.fields;
         fields.fighters = { type: "text", string: "Fighters" };
-        let arch = `
+        const arch = `
             <graph type="pie">
                 <field name="revenue" type="measure"/>
                 <field name="date" interval="day"/>
@@ -2128,7 +2128,7 @@ QUnit.module("Views", (hooks) => {
                 <field name="fighters" string="FooFighters"/>
             </graph>
         `;
-        let propsFromArch = new GraphArchParser().parse(arch, fields);
+        const propsFromArch = new GraphArchParser().parse(arch, fields);
         assert.deepEqual(propsFromArch, {
             fields,
             fieldAttrs: {