diff --git a/front/src/app/components/Breadcrumbs.tsx b/front/src/app/components/Breadcrumbs.tsx
index 53b9259f03..864a6ec044 100644
--- a/front/src/app/components/Breadcrumbs.tsx
+++ b/front/src/app/components/Breadcrumbs.tsx
@@ -3,13 +3,15 @@ import { Breadcrumb } from "@codegouvfr/react-dsfr/Breadcrumb";
 import { slice } from "ramda";
 import React from "react";
 import { errors } from "shared";
-import { makeBreadcrumbsSegments } from "../contents/breadcrumbs/breadcrumbs";
+import { getBreadcrumbs } from "src/app/contents/breadcrumbs/breadcrumbs";
 import { useRoute } from "../routes/routes";
 
 export const Breadcrumbs = () => {
   const { name: currentRouteName } = useRoute();
   if (!currentRouteName) return null;
-  const segments = makeBreadcrumbsSegments(currentRouteName);
+  const segments = getBreadcrumbs({
+    currentRouteKey: currentRouteName,
+  });
   if (segments.length === 1)
     throw errors.breadcrumbs.notFound({ currentRouteName });
   const ancestors = slice(0, -1, segments);
diff --git a/front/src/app/contents/breadcrumbs/breadcrumbs.ts b/front/src/app/contents/breadcrumbs/breadcrumbs.ts
index 37e6d52185..0288a7bcb4 100644
--- a/front/src/app/contents/breadcrumbs/breadcrumbs.ts
+++ b/front/src/app/contents/breadcrumbs/breadcrumbs.ts
@@ -1,6 +1,5 @@
 import { BreadcrumbProps } from "@codegouvfr/react-dsfr/Breadcrumb";
-import { flatten } from "ramda";
-import { keys } from "shared";
+import { makeBreadcrumbsSegments } from "src/app/utils/breadcrumbs";
 import { Route } from "type-route";
 import { FrontRouteKeys, FrontRouteUnion, routes } from "../../routes/routes";
 
@@ -12,11 +11,16 @@ export type BreadcrumbsItem = {
   };
 };
 
-export type Breadcrumbs = {
-  [K in FrontRouteKeys]?: BreadcrumbsItem;
+export type Breadcrumbs<T extends string> = {
+  [K in T]?: BreadcrumbsItem;
 };
 
-export const breadcrumbs: Breadcrumbs = {
+export const defaultAncestor: BreadcrumbProps["segments"][0] = {
+  label: "Accueil",
+  linkProps: routes.home().link,
+};
+
+export const breadcrumbs: Breadcrumbs<FrontRouteKeys> = {
   homeAgencies: {
     label: "Organismes prescripteurs",
     route: routes.homeAgencies(),
@@ -75,78 +79,7 @@ export const breadcrumbs: Breadcrumbs = {
   },
 };
 
-export const makeBreadcrumbsSegments = (
-  currentRouteKey: FrontRouteKeys,
-): BreadcrumbProps["segments"] => {
-  const currentRouteAncestor = keys(breadcrumbs).find((key) => {
-    const currentRouteInBreadcrumbs = breadcrumbs[key];
-    if (!currentRouteInBreadcrumbs) return false;
-    return (
-      currentRouteInBreadcrumbs.route.name === currentRouteKey ||
-      isRouteInChildren(currentRouteKey, currentRouteInBreadcrumbs)
-    );
-  });
-  return [
-    {
-      label: "Accueil",
-      linkProps: routes.home().link,
-    },
-    ...(currentRouteAncestor && breadcrumbs[currentRouteAncestor]
-      ? formatToBreadcrumbsSegments(
-          breadcrumbs[currentRouteAncestor],
-          currentRouteKey,
-        )
-      : []),
-  ];
-};
-
-const isRouteInChildren = (
-  currentRouteKey: FrontRouteKeys,
-  breadcrumbsItem: BreadcrumbsItem,
-): boolean => {
-  const children = breadcrumbsItem.children;
-  if (!children) return false;
-  return keys(children).some((key) => {
-    const child = children[key];
-    if (!child) return false;
-    if (child.route.name === currentRouteKey) return true;
-    if (child.children) {
-      return isRouteInChildren(currentRouteKey, child);
-    }
-  });
-};
-
-const formatToBreadcrumbsSegments = (
-  ancestor: BreadcrumbsItem,
-  currentRouteKey: FrontRouteKeys,
-): BreadcrumbProps["segments"] => {
-  const { label, route, children } = ancestor;
-  const ancestorSegment = { label, linkProps: route.link };
-  if (!children || ancestor.route.name === currentRouteKey)
-    return [ancestorSegment];
-  const childSegments = flatten(
-    keys(children).map((key) => {
-      const child = children[key];
-
-      if (!child) return;
-
-      const { route, label, children: childChildren } = child;
-      const { name: routeName, link: linkProps } = route;
-
-      if (
-        isRouteInChildren(currentRouteKey, child) &&
-        routeName !== currentRouteKey &&
-        childChildren
-      ) {
-        return formatToBreadcrumbsSegments(child, currentRouteKey);
-      }
-      if (routeName !== currentRouteKey) return;
-
-      return {
-        label,
-        linkProps,
-      };
-    }),
-  ).filter((child) => child !== undefined);
-  return [ancestorSegment, ...childSegments];
-};
+export const getBreadcrumbs = makeBreadcrumbsSegments(
+  breadcrumbs,
+  defaultAncestor,
+);
diff --git a/front/src/app/utils/breadcrumbs.ts b/front/src/app/utils/breadcrumbs.ts
new file mode 100644
index 0000000000..18b9cb911d
--- /dev/null
+++ b/front/src/app/utils/breadcrumbs.ts
@@ -0,0 +1,86 @@
+import { BreadcrumbProps } from "@codegouvfr/react-dsfr/Breadcrumb";
+import { flatten, keys } from "ramda";
+import {
+  Breadcrumbs,
+  BreadcrumbsItem,
+} from "src/app/contents/breadcrumbs/breadcrumbs";
+
+export const makeBreadcrumbsSegments =
+  <K>(
+    breadcrumbsSet: Breadcrumbs<K extends string ? K : never>,
+    rootAncestor: BreadcrumbProps["segments"][0],
+  ) =>
+  ({
+    currentRouteKey,
+  }: {
+    currentRouteKey: K;
+  }): BreadcrumbProps["segments"] => {
+    const currentRouteAncestor = keys(breadcrumbsSet).find((key) => {
+      const currentRouteInBreadcrumbs = breadcrumbsSet[key];
+      if (!currentRouteInBreadcrumbs) return false;
+      return (
+        currentRouteInBreadcrumbs.route.name === currentRouteKey ||
+        isRouteInChildren(currentRouteKey, currentRouteInBreadcrumbs)
+      );
+    });
+    return [
+      rootAncestor,
+      ...(currentRouteAncestor && breadcrumbsSet[currentRouteAncestor]
+        ? formatToBreadcrumbsSegments(
+            breadcrumbsSet[currentRouteAncestor],
+            currentRouteKey,
+          )
+        : []),
+    ];
+  };
+
+const isRouteInChildren = <T>(
+  currentRouteKey: T,
+  breadcrumbsItem: BreadcrumbsItem,
+): boolean => {
+  const children = breadcrumbsItem.children;
+  if (!children) return false;
+  return keys(children).some((key) => {
+    const child = children[key];
+    if (!child) return false;
+    if (child.route.name === currentRouteKey) return true;
+    if (child.children) {
+      return isRouteInChildren(currentRouteKey, child);
+    }
+  });
+};
+
+const formatToBreadcrumbsSegments = <T>(
+  ancestor: BreadcrumbsItem,
+  currentRouteKey: T,
+): BreadcrumbProps["segments"] => {
+  const { label, route, children } = ancestor;
+  const ancestorSegment = { label, linkProps: route.link };
+  if (!children || ancestor.route.name === currentRouteKey)
+    return [ancestorSegment];
+  const childSegments = flatten(
+    keys(children).map((key) => {
+      const child = children[key];
+
+      if (!child) return;
+
+      const { route, label, children: childChildren } = child;
+      const { name: routeName, link: linkProps } = route;
+
+      if (
+        isRouteInChildren(currentRouteKey, child) &&
+        routeName !== currentRouteKey &&
+        childChildren
+      ) {
+        return formatToBreadcrumbsSegments(child, currentRouteKey);
+      }
+      if (routeName !== currentRouteKey) return;
+
+      return {
+        label,
+        linkProps,
+      };
+    }),
+  ).filter((child) => child !== undefined);
+  return [ancestorSegment, ...childSegments];
+};
diff --git a/front/src/app/utils/breadcrumbs.unit.test.ts b/front/src/app/utils/breadcrumbs.unit.test.ts
new file mode 100644
index 0000000000..a17047ae31
--- /dev/null
+++ b/front/src/app/utils/breadcrumbs.unit.test.ts
@@ -0,0 +1,141 @@
+import { BreadcrumbProps } from "@codegouvfr/react-dsfr/Breadcrumb";
+import { Route } from "type-route";
+import { makeBreadcrumbsSegments } from "./breadcrumbs";
+
+const makeFakeRoute = (name: string): Route<any> => ({
+  name,
+  link: {
+    href: `/${name}`,
+    onClick: () => {},
+  },
+  action: null,
+  params: {},
+  href: `/${name}`,
+  push: () => {},
+  replace: () => {},
+});
+
+describe("makeBreadcrumbsSegments", () => {
+  it("should returns segments for a route at level 1", () => {
+    const segments = getTestBreadcrumbs({
+      currentRouteKey: "homeCandidates",
+    });
+    expect(segments).toEqual([
+      {
+        label: "Accueil",
+        linkProps: {
+          href: "/",
+          onClick: expect.any(Function),
+        },
+      },
+      {
+        label: "Candidats",
+        linkProps: {
+          href: "/homeCandidates",
+          onClick: expect.any(Function),
+        },
+      },
+    ]);
+  });
+  it("should returns segments for a route at a deep level", () => {
+    const segments = getTestBreadcrumbs({
+      currentRouteKey: "searchDiagoriente",
+    });
+    expect(segments).toEqual([
+      {
+        label: "Accueil",
+        linkProps: {
+          href: "/",
+          onClick: expect.any(Function),
+        },
+      },
+      {
+        label: "Candidats",
+        linkProps: {
+          href: "/homeCandidates",
+          onClick: expect.any(Function),
+        },
+      },
+      {
+        label: "Recherche",
+        linkProps: {
+          href: "/search",
+          onClick: expect.any(Function),
+        },
+      },
+      {
+        label: "Recherche (langage naturel)",
+        linkProps: {
+          href: "/searchDiagoriente",
+          onClick: expect.any(Function),
+        },
+      },
+    ]);
+  });
+
+  it("should returns segments for a route without its siblings", () => {
+    const segments = getTestBreadcrumbs({
+      currentRouteKey: "beneficiaryDashboard",
+    });
+    expect(segments).toEqual([
+      {
+        label: "Accueil",
+        linkProps: {
+          href: "/",
+          onClick: expect.any(Function),
+        },
+      },
+      {
+        label: "Candidats",
+        linkProps: {
+          href: "/homeCandidates",
+          onClick: expect.any(Function),
+        },
+      },
+      {
+        label: "Tableau de bord",
+        linkProps: {
+          href: "/beneficiaryDashboard",
+          onClick: expect.any(Function),
+        },
+      },
+    ]);
+  });
+});
+
+const testBreadcrumbsSet = {
+  homeCandidates: {
+    label: "Candidats",
+    route: makeFakeRoute("homeCandidates"),
+    children: {
+      search: {
+        label: "Recherche",
+        route: makeFakeRoute("search"),
+        children: {
+          searchDiagoriente: {
+            label: "Recherche (langage naturel)",
+            route: makeFakeRoute("searchDiagoriente"),
+          },
+        },
+      },
+
+      beneficiaryDashboard: {
+        label: "Tableau de bord",
+        route: makeFakeRoute("beneficiaryDashboard"),
+      },
+    },
+  },
+};
+
+const testRootAncestor: BreadcrumbProps["segments"][0] = {
+  label: "Accueil",
+  linkProps: {
+    href: "/",
+    onClick: () => {},
+  },
+};
+
+const getTestBreadcrumbs = makeBreadcrumbsSegments(
+  testBreadcrumbsSet,
+  testRootAncestor,
+);